This document discusses the state of laser applications in dermatology. It notes that due to technological advances, the range of laser applications in dermatology has expanded rapidly. A variety of benign skin disorders can now be treated with lasers, targeting lesions originating from epithelial, adnexal, vascular or other tissue elements. Modern laser technology improves conditions by using appropriate wavelengths to target vascular or pigmented lesions or by laser ablation to remove superficial disorders or for skin resurfacing purposes in photodamaged skin areas. As a result, lasers can now be used to treat a broad number of dermatological indications.
What is laser; Its uses in dermatology; Types of lasers; Treatment options for acne scars, melasma; hyper pigmentation; wrinkles; warts; Dark skin, facial rejuvenation; stains; rosacea; hair removal options;
Lasers have been used successfully to treat a variety of vascular lesions including superficial vascular malformations (port-wine stains), facial telangiectases, haemangiomas, pyogenic granulomas, Kaposi sarcoma and poikiloderma of Civatte. Lasers that have been used to treat these conditions include argon, APTD, KTP, krypton, copper vapour, copper bromide, pulsed dye lasers and Nd:YAG. Argon (CW) causes a high degree of non-specific thermal injury and scarring and is now largely replaced by yellow-light quasi-CW and pulsed laser therapies.
The pulsed dye laser is considered the laser of choice for most vascular lesions because of its superior clinical efficacy and low-risk profile. It has a large spot size (5 to 10mm) allowing large lesions to be treated quickly. Side effects include postoperative bruising (purpura) that may last 1-2 weeks and transient pigmentary changes. Crusting, textural changes and scarring are rarely seen.
Fractional laser resurfacing modalities can be used to treat various signs of aging skin and acne scarring. Ablative fractional CO2 lasers work by creating microscopic thermal zones that stimulate collagen remodeling but cause more downtime. Non-ablative fractional lasers like Er:glass cause less injury and faster healing but may require more treatments. Both can improve acne scarring and wrinkles but ablative lasers carry higher risks of post-inflammatory hyperpigmentation which commonly occurs in Asian skin. Precise patient selection and education on risks and post-care are important when using lasers for skin rejuvenation.
The document provides a history of chemical peels, beginning in ancient Egypt and continuing through developments in the late 19th and 20th centuries. It describes the histological changes that occur with peeling, including the regeneration of epidermis and formation of new collagen. Medium peels are described as causing necrosis of the epidermis and inflammation within the papillary dermis, improving skin texture and removing lesions in moderately photodamaged skin. Various techniques and agents used for medium peels are outlined, including combinations of trichloroacetic acid, Jessner's solution, and glycolic acid.
This document discusses ablative and nonablative lasers for face rejuvenation. It provides details on how different laser wavelengths interact with tissue and the appropriate depth of penetration. It also discusses patient evaluation and pre/postoperative care for procedures like CO2 laser resurfacing. Complications can include prolonged erythema, milia, acne, and contact dermatitis. Selecting the right patient and laser settings is important to achieve results safely based on a person's skin type and goals.
Melasma is an acquired hyperpigmentation disorder that causes dark brown patches of skin discoloration, usually on the face. It is more common in females and often occurs during pregnancy due to increased estrogen and progesterone levels. Sun exposure triggers increased melanin production, worsening melasma. The goals of treatment are to decrease melanin production and restore an even skin tone using sunscreen, triple combination creams containing hydroquinone, retinoids, and mild corticosteroids. A dermatologist can diagnose melasma through visual examination, Wood's lamp, or skin biopsy.
This document provides an overview of laser therapy basics. It discusses the principles of lasers, including how they work by stimulating emission of radiation. It describes the different types of lasers categorized by their lasing medium (solid, gas, liquid) and wavelengths commonly used (CO2, Nd:YAG, excimer). The document explains principles of selective photothermolysis and how parameters like wavelength, pulse duration, and skin cooling can be optimized for specific clinical indications and target chromophores in the skin.
What is laser; Its uses in dermatology; Types of lasers; Treatment options for acne scars, melasma; hyper pigmentation; wrinkles; warts; Dark skin, facial rejuvenation; stains; rosacea; hair removal options;
Lasers have been used successfully to treat a variety of vascular lesions including superficial vascular malformations (port-wine stains), facial telangiectases, haemangiomas, pyogenic granulomas, Kaposi sarcoma and poikiloderma of Civatte. Lasers that have been used to treat these conditions include argon, APTD, KTP, krypton, copper vapour, copper bromide, pulsed dye lasers and Nd:YAG. Argon (CW) causes a high degree of non-specific thermal injury and scarring and is now largely replaced by yellow-light quasi-CW and pulsed laser therapies.
The pulsed dye laser is considered the laser of choice for most vascular lesions because of its superior clinical efficacy and low-risk profile. It has a large spot size (5 to 10mm) allowing large lesions to be treated quickly. Side effects include postoperative bruising (purpura) that may last 1-2 weeks and transient pigmentary changes. Crusting, textural changes and scarring are rarely seen.
Fractional laser resurfacing modalities can be used to treat various signs of aging skin and acne scarring. Ablative fractional CO2 lasers work by creating microscopic thermal zones that stimulate collagen remodeling but cause more downtime. Non-ablative fractional lasers like Er:glass cause less injury and faster healing but may require more treatments. Both can improve acne scarring and wrinkles but ablative lasers carry higher risks of post-inflammatory hyperpigmentation which commonly occurs in Asian skin. Precise patient selection and education on risks and post-care are important when using lasers for skin rejuvenation.
The document provides a history of chemical peels, beginning in ancient Egypt and continuing through developments in the late 19th and 20th centuries. It describes the histological changes that occur with peeling, including the regeneration of epidermis and formation of new collagen. Medium peels are described as causing necrosis of the epidermis and inflammation within the papillary dermis, improving skin texture and removing lesions in moderately photodamaged skin. Various techniques and agents used for medium peels are outlined, including combinations of trichloroacetic acid, Jessner's solution, and glycolic acid.
This document discusses ablative and nonablative lasers for face rejuvenation. It provides details on how different laser wavelengths interact with tissue and the appropriate depth of penetration. It also discusses patient evaluation and pre/postoperative care for procedures like CO2 laser resurfacing. Complications can include prolonged erythema, milia, acne, and contact dermatitis. Selecting the right patient and laser settings is important to achieve results safely based on a person's skin type and goals.
Melasma is an acquired hyperpigmentation disorder that causes dark brown patches of skin discoloration, usually on the face. It is more common in females and often occurs during pregnancy due to increased estrogen and progesterone levels. Sun exposure triggers increased melanin production, worsening melasma. The goals of treatment are to decrease melanin production and restore an even skin tone using sunscreen, triple combination creams containing hydroquinone, retinoids, and mild corticosteroids. A dermatologist can diagnose melasma through visual examination, Wood's lamp, or skin biopsy.
This document provides an overview of laser therapy basics. It discusses the principles of lasers, including how they work by stimulating emission of radiation. It describes the different types of lasers categorized by their lasing medium (solid, gas, liquid) and wavelengths commonly used (CO2, Nd:YAG, excimer). The document explains principles of selective photothermolysis and how parameters like wavelength, pulse duration, and skin cooling can be optimized for specific clinical indications and target chromophores in the skin.
BASICS OF LASER AND IT'S USE IN DERMATOLOGYRohit Singh
The document discusses lasers and their uses in dermatology. It begins with definitions and a brief history of lasers, describing some important early pioneers and dates. The basic components and working principles of lasers are then explained, including population inversion, stimulated emission, and the use of gain medium, pumping systems, and optical resonators. Different types of lasers are also categorized based on their gain medium, such as gas, solid state, and dye lasers. Applications of lasers in dermatology are enabled by their interactions with chromophores in the skin and ability to penetrate at varying depths depending on the wavelength. Thermal effects on tissue include photocoagulation and photo-vaporization.
This document discusses pulsed dye lasers used to treat vascular lesions. It describes how pulsed dye lasers work using selective photothermolysis to target hemoglobin in blood vessels. The optimal wavelength of 585nm is absorbed by oxyhemoglobin and penetrates deeply while being less absorbed by melanin. Treatment involves determining the minimum purpuric dose, testing the dose on a small area, and pulsing overlapping spots to effectively cover the treatment area. Post-treatment care includes sunscreen for 6 months and antibiotics until purpura resolves. Complications are generally minor and self-resolving. Examples are provided of port wine stains, telangiectasias, rosacea, and leg veins successfully treated with
Fractional co2 laser operation instructionMindy Ma
1) The document provides instructions for pre-operation, operation procedure, post-operation care for fractional CO2 laser treatment. Patients are advised to avoid medications and smoking before treatment and have someone accompany them after.
2) The operation involves cleaning the skin, applying anesthetic, using the fractional CO2 laser at various settings depending on the treatment area and condition, and applying cold air and post-treatment laser for comfort and healing.
3) Post-treatment patients can expect redness, peeling and a burning sensation that lasts hours while healing over days. They are advised to keep the area moisturized and avoid sun exposure while it heals.
Fractional radiofrequency microneedling in esthetic medicinepeternugraha
The document discusses fractional radiofrequency microneedling, a treatment for atrophic scars and acne. It begins with an outline of topics to be covered, including atrophic scars, microneedling, radiofrequency, and the effects of fractional radiofrequency microneedling. The document then reviews classification systems for acne scars and the basic science of radiofrequency. Several studies are cited that evaluated the efficacy of fractional radiofrequency microneedling in improving acne scars and decreasing acne lesions in comparison to other treatments.
PDO thread lifting is a minimally invasive procedure that lifts and smoothens skin using dissolvable PDO threads inserted into the hypodermis layer. The threads stimulate collagen production, increased blood flow, and natural hyaluronic acid production, resulting in subtle, long-lasting lifting effects without deformation. PDO threads work similarly to Botox but provide a longer duration of results without risk of drooping.
Microdermabrasion is a minimally invasive procedure used to renew overall skin tone and texture.It gently sand your skin, removing the thicker, uneven outer layer.
The procedure uses a special applicator with an abrasive surface to gently sand away the thick outer layer of the skin to rejuvenate it.
It helps to thicken your collagen, which results in a younger looking complexion. Collagen is a protein in your skin that's abundant when you're a child and makes skin appear taut and smooth. Collagen production declines as we age, resulting in looser, uneven skin.
Microdermabrasion helps to
-Improve age spots and black heads
-Improve hyperpigmentation (patches of darkened skin)
-Exfoliate your skin, resulting in a refreshed appearance
-Lessen the appearance of stretch marks.
-Reduce fine lines and wrinkles
-Reduce or eliminate enlarged pores
-Treat acne and the scars left by acne
Dr Sachdeva's Dental clinic and Facial aesthetic centre is one of the leading clinics performing microblading in Delhi. So hurry up and come book an appointment with us at Dr.Sachdeva’s Dental Institute, Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
www.dentalcoursesdelhi.com
Facebook- dentalcoursesdelhi
Youtube- drrajatsachdeva
Linkedin- drrajatsachdeva
Slideshare- Dr Rajat Sachdeva
Twitter Page- drrajatsachdeva
Instagram page- surgicalmasterrajat
Micro needling is a procedure that uses small needles to prick the skin which helps in generation of new collagen and makes the skin smoother,firmer and toned.It is also known as collagen induction therapy.It is used for the treatment of acne,wrinkles,scars, stretch marks,fine lines and other signs of ageing.As we age collagen content in our skin reduces and we lose our radiance. Micro needling is not a quick fix it might take weeks to months to show the desired results as it takes some time for the new skin to be formed.
Dr Sachdeva's Dental clinic and Facial aesthetic center is one of the leading clinics performing micro needling for anti ageing in Delhi. So hurry up and come book an appointment with us at Dr.Sachdeva’s Dental Institute, Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
www.dentalcoursesdelhi.com
Facebook- dentalcoursesdelhi
Youtube- drrajatsachdeva
Linkedin- drrajatsachdeva
Slideshare- Dr Rajat Sachdeva
Twitter Page- drrajatsachdeva
Instagram page- surgicalmasterrajat
This document provides information about radio frequency skin tightening treatments. It discusses how advances in non-invasive cosmetic treatments now allow people to reduce signs of aging without surgery. Radio frequency skin tightening uses thermal energy to stimulate collagen production and tighten skin in a non-invasive manner. While not as effective as surgery, it can provide mild to moderate skin tightening with little downtime. The document examines various radio frequency devices and how they work to tighten skin through collagen remodeling without surgery. It aims to help readers understand if a non-invasive treatment like radio frequency skin tightening may be right for their aesthetic goals and skin concerns.
This document discusses post inflammatory scarring, specifically acne scarring. It defines different types of scarring such as hypertrophic, keloid, and atrophic scarring. It further classifies atrophic scarring into icepick, boxcar, and rolling scars. The document then discusses various treatment options for acne scarring including chemical peels, microdermabrasion, subcision, and skin needling. It provides details on how these procedures work and reviews studies showing their effectiveness in improving acne scarring.
Dermatoscopy is a non-invasive diagnostic tool that allows visualization of subsurface skin structures using magnification and immersion fluids. It has various applications in dermatology including evaluation of pigmented and non-pigmented skin lesions. Primary criteria seen on dermatoscopy such as globules, dots, and pigment network patterns help distinguish benign lesions from malignant melanoma. Secondary criteria like blue-gray areas, depigmentation, and vascular patterns provide additional diagnostic information. Dermatoscopy is also used to evaluate hair, nail, and infectious skin conditions.
If aging, acne, or too much time in the sun has left your face with blotches, scars, wrinkles, or lines, laser skin resurfacing may help your skin look younger and healthier.
Laser skin resurfacing removes skin layer by layer with precision. The new skin cells that form during healing give the skin a tighter, younger looking surface.
Dr Sachdeva's Dental and Facial aesthetic center is one of the leading clinics in Delhi. So hurry up and come book an appointment with us Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
www.dentalcoursesdelhi.com
Facebook- dentalcoursesdelhi
Youtube- drrajatsachdeva
Linkedin- drrajatsachdeva
Slideshare- Dr Rajat Sachdeva
Twitter Page- drrajatsachdeva
Instagram page- surgicalmasterrajat
As the title mentions, learn how LASER's are useful for cosmetic and non cosmetic purposes. This is a purely medicine based topic. Not described in lay man terms.
Botulinum toxin is produced by Clostridium botulinum bacteria. It works by blocking the release of acetylcholine at neuromuscular junctions, preventing muscle contraction. It has been used since the 1980s to treat medical conditions involving muscle overactivity like strabismus and dystonia. In the 1990s, its use was explored for cosmetic purposes to reduce facial wrinkles. The FDA approved its use for frown lines in 2002 and excessive underarm sweating in 2004. It is injected into specific facial muscles to weaken them and smooth wrinkles. Common sites include the glabella, forehead, crow's feet, bunny lines, marionette lines and platysmal bands. Potential complications include
Derma fillers are gel like substances that are injected beneath the skin to restore lost volume,smooth lines and soften creases, or enhance facial contours.They can be used as "volumizers" plumping and lifting cheeks,chins,jawlines and temples, filling out thin lips.Mostly Hylarudonic acid fillers like Juvederm are used.The procedure takes around 30-45 minutes and patients can see results in about 10 days-2weeks.
Derma Fillers are done at Dr Sachdeva's Dental clinic and Facial aesthetic centre in Delhi. So hurry up and come book an appointment with us at Dr.Sachdeva’s Dental Institute, Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
www.dentalcoursesdelhi.com
Facebook- dentalcoursesdelhi
Youtube- drrajatsachdeva
Linkedin- drrajatsachdeva
Slideshare- Dr Rajat Sachdeva
Twitter Page- drrajatsachdeva
Instagram page- surgicalmasterrajat
This document discusses laser therapy and principles of laser use. It provides background on the history of lasers including early science fiction references. It describes the basic science of how lasers work through stimulated emission and outlines the key components of lasers. The document discusses principles of selective photothermolysis and factors that influence laser effectiveness such as wavelength, pulse duration, and energy density. It also reviews laser safety and how lasers are used in a clinical setting.
Laser hair removal is a safe laser technology that targets and destroys hair follicles to reduce unwanted hair growth from the face and body. It does not damage skin. Multiple sessions are typically needed for best results, as it reduces hair density and extends the time between regrowth. Some temporary redness or swelling may occur but fades quickly. Laser hair removal provides a near-permanent solution for unwanted hair and smooth skin without side effects like waxing or shaving.
Fractional lasers generate small columns of thermally denatured skin to stimulate collagen production. While generally safe, fractional laser procedures can potentially lead to infections like herpes or MRSA if proper infection control practices are not followed. Key aspects of infection control include screening patients, obtaining informed consent, proper cleaning and disinfection or replacement of laser components, and following post-operative care guidelines. The risk of infections varies depending on the specific laser wavelength used, with longer 1550nm wavelengths associated with fewer complications than shorter CO2 wavelengths.
Microdermabrasion is a non-invasive skin treatment that uses aluminum oxide crystals or diamond-tipped applicators to gently exfoliate the outermost layer of dead skin cells. It works by using vacuum suction and an abrasive material to remove the stratum corneum and stimulate collagen production, resulting in smoother skin texture, reduced wrinkles and hyperpigmentation. Microdermabrasion has been performed since ancient Egypt using various abrasive tools, and the modern procedure was invented in Italy in 1985 using vacuum suction and microcrystals. It is generally a safe, painless treatment with minimal side effects like temporary redness or flaking.
This document summarizes various methods for temporary and permanent hair removal. Temporary methods include shaving, tweezing, bleaching, and depilatory creams. Permanent methods discussed are electrolysis, thermolysis, and laser/IPL treatments. Key factors for effective laser hair removal include appropriate wavelength and pulse duration based on skin and hair characteristics. Multiple treatments spaced 1-3 months apart are typically needed to achieve significant hair reduction. Potential side effects include pain, pigmentary changes, and infection if not performed properly. Permanent hair removal is difficult to achieve and regrowth may still occur.
1) Laser hair removal works by emitting a gentle light beam that is absorbed by the hair follicle, transforming the light energy to heat to permanently destroy the follicle while leaving the skin unharmed.
2) It requires multiple treatments over 9-15 months as only 10-20% of hairs are in the treatable growth phase at a given time and there are hundreds of thousands of follicles in any body area.
3) The main risks are burns, scarring, and discoloration, which can be prevented by avoiding tanning before and after treatments and informing staff of any pain over level 4 during the procedure.
Laser resurfacing uses lasers to remove the outer layers of skin. Ablative laser resurfacing fully vaporizes skin to create new collagen and elastic tissue, treating conditions like wrinkles, scars, and sun damage. CO2 and Er:YAG lasers are commonly used. Side effects include erythema, hyperpigmentation, hypopigmentation, acne, and potential scarring. Precautions like antiviral use and hydrogel dressings minimize risks. Lasers provide effective skin rejuvenation but require post-operative management of side effects.
The document discusses the various medical applications of lasers. It begins by listing some common surgical and cosmetic uses of lasers, such as removing tumors, making incisions, resurfacing skin, and removing tattoos and birthmarks. It then provides more detail on the use of lasers in ophthalmology to perform procedures like removing cataracts and repairing retinas. The document goes on to explain the basic physics behind how lasers work, including atomic structure, light emission, population inversion, and stimulated emission. It describes the characteristics of lasers compared to other light sources, such as directionality, pure color, and temporal coherence. Finally, it discusses various mechanisms of laser-tissue interaction including phot
BASICS OF LASER AND IT'S USE IN DERMATOLOGYRohit Singh
The document discusses lasers and their uses in dermatology. It begins with definitions and a brief history of lasers, describing some important early pioneers and dates. The basic components and working principles of lasers are then explained, including population inversion, stimulated emission, and the use of gain medium, pumping systems, and optical resonators. Different types of lasers are also categorized based on their gain medium, such as gas, solid state, and dye lasers. Applications of lasers in dermatology are enabled by their interactions with chromophores in the skin and ability to penetrate at varying depths depending on the wavelength. Thermal effects on tissue include photocoagulation and photo-vaporization.
This document discusses pulsed dye lasers used to treat vascular lesions. It describes how pulsed dye lasers work using selective photothermolysis to target hemoglobin in blood vessels. The optimal wavelength of 585nm is absorbed by oxyhemoglobin and penetrates deeply while being less absorbed by melanin. Treatment involves determining the minimum purpuric dose, testing the dose on a small area, and pulsing overlapping spots to effectively cover the treatment area. Post-treatment care includes sunscreen for 6 months and antibiotics until purpura resolves. Complications are generally minor and self-resolving. Examples are provided of port wine stains, telangiectasias, rosacea, and leg veins successfully treated with
Fractional co2 laser operation instructionMindy Ma
1) The document provides instructions for pre-operation, operation procedure, post-operation care for fractional CO2 laser treatment. Patients are advised to avoid medications and smoking before treatment and have someone accompany them after.
2) The operation involves cleaning the skin, applying anesthetic, using the fractional CO2 laser at various settings depending on the treatment area and condition, and applying cold air and post-treatment laser for comfort and healing.
3) Post-treatment patients can expect redness, peeling and a burning sensation that lasts hours while healing over days. They are advised to keep the area moisturized and avoid sun exposure while it heals.
Fractional radiofrequency microneedling in esthetic medicinepeternugraha
The document discusses fractional radiofrequency microneedling, a treatment for atrophic scars and acne. It begins with an outline of topics to be covered, including atrophic scars, microneedling, radiofrequency, and the effects of fractional radiofrequency microneedling. The document then reviews classification systems for acne scars and the basic science of radiofrequency. Several studies are cited that evaluated the efficacy of fractional radiofrequency microneedling in improving acne scars and decreasing acne lesions in comparison to other treatments.
PDO thread lifting is a minimally invasive procedure that lifts and smoothens skin using dissolvable PDO threads inserted into the hypodermis layer. The threads stimulate collagen production, increased blood flow, and natural hyaluronic acid production, resulting in subtle, long-lasting lifting effects without deformation. PDO threads work similarly to Botox but provide a longer duration of results without risk of drooping.
Microdermabrasion is a minimally invasive procedure used to renew overall skin tone and texture.It gently sand your skin, removing the thicker, uneven outer layer.
The procedure uses a special applicator with an abrasive surface to gently sand away the thick outer layer of the skin to rejuvenate it.
It helps to thicken your collagen, which results in a younger looking complexion. Collagen is a protein in your skin that's abundant when you're a child and makes skin appear taut and smooth. Collagen production declines as we age, resulting in looser, uneven skin.
Microdermabrasion helps to
-Improve age spots and black heads
-Improve hyperpigmentation (patches of darkened skin)
-Exfoliate your skin, resulting in a refreshed appearance
-Lessen the appearance of stretch marks.
-Reduce fine lines and wrinkles
-Reduce or eliminate enlarged pores
-Treat acne and the scars left by acne
Dr Sachdeva's Dental clinic and Facial aesthetic centre is one of the leading clinics performing microblading in Delhi. So hurry up and come book an appointment with us at Dr.Sachdeva’s Dental Institute, Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
www.dentalcoursesdelhi.com
Facebook- dentalcoursesdelhi
Youtube- drrajatsachdeva
Linkedin- drrajatsachdeva
Slideshare- Dr Rajat Sachdeva
Twitter Page- drrajatsachdeva
Instagram page- surgicalmasterrajat
Micro needling is a procedure that uses small needles to prick the skin which helps in generation of new collagen and makes the skin smoother,firmer and toned.It is also known as collagen induction therapy.It is used for the treatment of acne,wrinkles,scars, stretch marks,fine lines and other signs of ageing.As we age collagen content in our skin reduces and we lose our radiance. Micro needling is not a quick fix it might take weeks to months to show the desired results as it takes some time for the new skin to be formed.
Dr Sachdeva's Dental clinic and Facial aesthetic center is one of the leading clinics performing micro needling for anti ageing in Delhi. So hurry up and come book an appointment with us at Dr.Sachdeva’s Dental Institute, Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
www.dentalcoursesdelhi.com
Facebook- dentalcoursesdelhi
Youtube- drrajatsachdeva
Linkedin- drrajatsachdeva
Slideshare- Dr Rajat Sachdeva
Twitter Page- drrajatsachdeva
Instagram page- surgicalmasterrajat
This document provides information about radio frequency skin tightening treatments. It discusses how advances in non-invasive cosmetic treatments now allow people to reduce signs of aging without surgery. Radio frequency skin tightening uses thermal energy to stimulate collagen production and tighten skin in a non-invasive manner. While not as effective as surgery, it can provide mild to moderate skin tightening with little downtime. The document examines various radio frequency devices and how they work to tighten skin through collagen remodeling without surgery. It aims to help readers understand if a non-invasive treatment like radio frequency skin tightening may be right for their aesthetic goals and skin concerns.
This document discusses post inflammatory scarring, specifically acne scarring. It defines different types of scarring such as hypertrophic, keloid, and atrophic scarring. It further classifies atrophic scarring into icepick, boxcar, and rolling scars. The document then discusses various treatment options for acne scarring including chemical peels, microdermabrasion, subcision, and skin needling. It provides details on how these procedures work and reviews studies showing their effectiveness in improving acne scarring.
Dermatoscopy is a non-invasive diagnostic tool that allows visualization of subsurface skin structures using magnification and immersion fluids. It has various applications in dermatology including evaluation of pigmented and non-pigmented skin lesions. Primary criteria seen on dermatoscopy such as globules, dots, and pigment network patterns help distinguish benign lesions from malignant melanoma. Secondary criteria like blue-gray areas, depigmentation, and vascular patterns provide additional diagnostic information. Dermatoscopy is also used to evaluate hair, nail, and infectious skin conditions.
If aging, acne, or too much time in the sun has left your face with blotches, scars, wrinkles, or lines, laser skin resurfacing may help your skin look younger and healthier.
Laser skin resurfacing removes skin layer by layer with precision. The new skin cells that form during healing give the skin a tighter, younger looking surface.
Dr Sachdeva's Dental and Facial aesthetic center is one of the leading clinics in Delhi. So hurry up and come book an appointment with us Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
www.dentalcoursesdelhi.com
Facebook- dentalcoursesdelhi
Youtube- drrajatsachdeva
Linkedin- drrajatsachdeva
Slideshare- Dr Rajat Sachdeva
Twitter Page- drrajatsachdeva
Instagram page- surgicalmasterrajat
As the title mentions, learn how LASER's are useful for cosmetic and non cosmetic purposes. This is a purely medicine based topic. Not described in lay man terms.
Botulinum toxin is produced by Clostridium botulinum bacteria. It works by blocking the release of acetylcholine at neuromuscular junctions, preventing muscle contraction. It has been used since the 1980s to treat medical conditions involving muscle overactivity like strabismus and dystonia. In the 1990s, its use was explored for cosmetic purposes to reduce facial wrinkles. The FDA approved its use for frown lines in 2002 and excessive underarm sweating in 2004. It is injected into specific facial muscles to weaken them and smooth wrinkles. Common sites include the glabella, forehead, crow's feet, bunny lines, marionette lines and platysmal bands. Potential complications include
Derma fillers are gel like substances that are injected beneath the skin to restore lost volume,smooth lines and soften creases, or enhance facial contours.They can be used as "volumizers" plumping and lifting cheeks,chins,jawlines and temples, filling out thin lips.Mostly Hylarudonic acid fillers like Juvederm are used.The procedure takes around 30-45 minutes and patients can see results in about 10 days-2weeks.
Derma Fillers are done at Dr Sachdeva's Dental clinic and Facial aesthetic centre in Delhi. So hurry up and come book an appointment with us at Dr.Sachdeva’s Dental Institute, Ashok Vihar, Delhi which has state of the art clinic and all the latest and advanced equipments.
To book an appointment contact:
Dr. Rajat Sachdeva
Director & Mentor
Dr Sachdeva’s Dental Aesthetic And Implant Institute
I 101, Ashok Vihar Phase 1, Delhi- 110052
Contact us at
Phone : +919818894041,01142464041
Our Websites:
www.sachdevadentalcare.com
www.dentalimplantindia.co.in
www.dentalclinicindelhi.com
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This document discusses laser therapy and principles of laser use. It provides background on the history of lasers including early science fiction references. It describes the basic science of how lasers work through stimulated emission and outlines the key components of lasers. The document discusses principles of selective photothermolysis and factors that influence laser effectiveness such as wavelength, pulse duration, and energy density. It also reviews laser safety and how lasers are used in a clinical setting.
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1. Topical therapy involves applying medicaments directly to the skin or mucosa. Drug penetration is inversely related to the thickness of the stratum corneum and maximal over mucous membranes.
2. Percutaneous absorption of drugs occurs via transcellular, intercellular, or transappendageal pathways across or between skin cells or through hair follicles and glands.
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Lasers emit light that is highly directional, monochromatic, and coherent. Common laser components include an active medium, excitation mechanism, and high and partially reflective mirrors. Lasing occurs when atoms in the active medium are excited and stimulated emission produces photons. Laser output is measured in watts, joules, irradiance, and pulsed vs. continuous wave. Laser hazards include eye, skin, chemical, electrical, and fire risks. Lasers are classified based on wavelength, average power, energy per pulse, and beam exposure to determine appropriate safety controls.
The document summarizes the history and science behind lasers. It discusses how the laser was first conceived in the 1950s and built in 1960. It then explains the basic components of a laser including an energy input source and a gain medium that produces stimulated emission when pumped with energy. Examples of common laser types and materials are provided. Applications of lasers in spectroscopy, surgery, and distance measurements to the moon are also mentioned.
This document discusses various incisions and techniques used in rhinoplasty surgery. It describes the main incisions used including caudal septal, intercartilaginous, vestibular, infracartilaginous, and transcolumellar incisions. It then discusses techniques for accessing and mobilizing the bony nasal pyramid including different types of osteotomies. Other topics covered include hump removal, saddle nose correction, tip surgery, and correcting various tip abnormalities.
1) Phototherapy uses light or radiant energy to treat ocular diseases through mechanisms like photocoagulation, thermotherapy, photodisruption, and photodynamic therapy.
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This document discusses the use of lasers in dentistry. It begins by explaining how lasers were first developed in the 1960s and are now used for many procedures like cavity preparation and surgery. Different types of lasers are described, including CO2, argon, Nd:YAG, KTP, and erbium lasers. The document discusses how lasers work by producing photons that are absorbed by chromophores in tissue, and the various biological effects this can cause like coagulation, ablation, and biostimulation. Safety considerations for using lasers in surgery are also mentioned.
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Laser science is principally concerned with quantum electronics, laser construction, optical cavity design, the physics of producing a population inversion in laser media, and the temporal evolution of the light field in the laser. It is also concerned with the physics of laser beam propagation, particularly the physics of Gaussian beams, with laser applications, and with associated fields such as non-linear optics and quantum optics.
This document discusses the history and principles of selective photothermolysis for treating pigmented lesions and tattoos. It describes how selective photothermolysis uses laser pulses that are preferentially absorbed by the target chromophores (melanin or tattoo ink) to thermally damage them, while minimizing damage to surrounding tissue. The document outlines the key elements needed for selective photothermolysis and discusses how different laser types can be used depending on the depth and type of pigmentation. It provides tables listing currently available laser and light-based devices used for treating various pigmented lesions and tattoos.
The document discusses lasers used in dentistry. It begins with an introduction to lasers and their history in dentistry. Key topics covered include the mechanism of action of lasers, common dental laser therapies, and safety measures when using lasers. Examples are provided of how different types of lasers like CO2, Nd:YAG, and diode lasers are used for both soft tissue and hard tissue procedures in dentistry.
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Low Level Laser Therapy (LLLT) is a fast growing field of medicine recognized by every major industrialized nation in the world, offering painless, non-invasive and highly effective drug-free solutions. Able to treat a plethora of neural muscular skeletal conditions, LLLT is often the only solution that is available to the highly trained practitioner to control disease when conventional therapies have come up lacking.
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Travel vaccination in Manchester offers comprehensive immunization services for individuals planning international trips. Expert healthcare providers administer vaccines tailored to your destination, ensuring you stay protected against various diseases. Conveniently located clinics and flexible appointment options make it easy to get the necessary shots before your journey. Stay healthy and travel with confidence by getting vaccinated in Manchester. Visit us: www.nxhealthcare.co.uk
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- Video recording of this lecture in English language: https://youtu.be/Pt1nA32sdHQ
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Are you looking for a long-lasting solution to your missing tooth?
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1. Medical Laser Application 20 (2005) 103–109
Lasers in dermatology – State of the art
Roland KaufmannÃ
Zentrum der Dermatologie und Venerologie, Klinikum der J.W. Goethe-Universita¨t, Theodor-Stern-Kai 7, 69590 Frankfurt am
Main, Germany
Received 11 March 2005; accepted 14 March 2005
Abstract
Owing to the increasing diversity of technological developments and to the resulting versatility of treatment options,
the range of laser applications in dermatology has been expanding rapidly. A large variety of benign skin disorders
originating from diverse epithelial, adnexal, vascular or other tissue elements, but also many disease-related or
acquired cutaneous lesions as well as signs of aged skin or disorders of hair growth can be amenable to laser light
treatment. In fact, modern laser technology does improve the majority of such cases either by means of appropriate
wavelengths targeting vascular or pigmented lesions or by laser ablation widely utilized to superficially remove
circumscribed disorders and moreover for skin resurfacing purposes mainly in photodamaged skin areas. As a
consequence, we meanwhile face a broad number of potential indications in Dermatology. Nevertheless, also non-
ablative skin rejuvenation techniques using intense pulsed light sources (IPL technology) or radiofrequency (RF)
devices for a non-optical energy delivery as well as the introduction of photodynamic therapy have noticeably
influenced today’s concepts especially with regard to skin rejuvenation purposes.
r 2005 Elsevier GmbH. All rights reserved.
Keywords: Skin disorder; Laser therapy; Review
Introduction
Advances in laser technology as well as an increasing
demand for the removal of unsightly or disturbing skin
lesions appearing throughout life have both contributed
to a rapidly expanding field of laser use in Dermatology.
Consequently, we today are facing not only a growing
range in versatile laser systems, but also an extremely
broad spectrum of potential candidate lesions [1]. As
compared to other treatment options, the use of lasers
aims at a selective removal of diseased target structures
with maximum sparing of uninvolved adjacent skin.
This selectivity can at least to some degree be achieved
by choosing the appropriate laser light wavelength and
pulse duration responsible for the amount of heat
diffusion. Continuous-wave (cw) laser beams are used
for coagulation or vaporization of skin lesions and
largely depend on the penetration depth of heat energy
into the skin. On the other hand, selective photother-
molysis combines short pulses (avoiding relevant tissue
heating) of laser light with wavelengths selectively
absorbed by target chromophores (better focusing the
delivered energy to target structures) thus contributing
to a more specific treatment in both pigmented (melanin
as a target chromophore) and vascular lesions (hemo-
globin in blood vessels as chromophore), but moreover
also in ablative procedures (tissue water as target). For
superficial epidermal, vascular and pigmented lesions,
several laser systems can be used alternatively with
ARTICLE IN PRESS
www.elsevier.de/mla
1615-1615/$ - see front matter r 2005 Elsevier GmbH. All rights reserved.
doi:10.1016/j.mla.2005.03.005
ÃTel.: +49 69 6301 5311; fax: +49 69 6301 5117.
E-mail address: Kaufmann@em.uni-frankfurt.de (R. Kaufmann).
2. preference depending on the depth, volume and type of
diseased or disturbing tissue structures. Lasers typically
employed in destructing vascular or pigmented skin
lesions are summarized in Table 1. Apart from lasers
specifically targeting vascular or pigmented disorders
and those achieving a circumscribed removal of super-
ficial lesions, some systems are used in an attempt to
either ablate or vaporize larger surface areas (e.g.
resurfacing of sun-damaged skin and wrinkles) or to
thermally influence the dermal tissue while sparing the
epidermal surface by subablative energy delivery (sub-
surfacing of textural changes and fine wrinkles in
elastotic skin changes). Nevertheless, also non-ablative
skin rejuvenation techniques by means of intense pulsed
light sources (IPL technology) or employing radio-
frequency (RF) devices for a non-optical energy delivery
as well as the introduction of photodynamic photo-
rejuvenation have noticeably influenced the concepts of
using light sources, especially with regard to laser skin
resurfacing of photo-aged skin. A survey is given in
Table 2.
Indications for lasers in dermatology
Unpleasant skin lesions suitable for laser therapy can
be present since birth (e.g. portwine stains) or might
appear later in life as acquired malformations, benign
tumors or otherwise disturbing lesions related to specific
diseases (e.g. keratotic lesions in Darier’s disease). They
can originate from a vast array of epithelial, adnexal,
vascular or other tissue elements. Many of those
occurring later in life are associated with the perception
of an aged skin (e.g. senile angioma, senile lentigines). In
addition, lasers can be indicated in disorders of hair
growth, of pigmentation or even in inflammatory skin
diseases, such as chronic plaque psoriasis. The majority
of these conditions do at least improve by the use of
appropriate laser systems available today. In some
special cases, laser therapy is best combined with other
techniques. Table 3 summarizes examples from diverse
fields of indications.
Pigmentary disorders
The advantage of laser use in Dermatology is
certainly most obvious in some of the various pigmented
disorders that cannot be removed by any other
treatment alternative [2]. One example is the transcuta-
neous destruction of exogenously incorporated pigment
in either decorative or traumatic tattoos [3]. Especially
deeper non-professional black pigments are usually
successfully lightened by diverse pigment-specific laser
types (Q-switched 1064 nm Nd:YAG-, 694 nm Ruby-, or
755 nm Alexandrite Lasers) within only few treatment
sessions [4]. Ruby- and Alexandrite-laser wavelengths
ARTICLE IN PRESS
Table 1. Lasers frequently used in vascular and pigmented skin lesions
Therapeutic purpose Laser type Mode Wavelength (nm)
1. Vessels
Superficial photocoagulation Argon cw 488, 514
KTP Pulsed/Q-switch 532
Diode Long pulse 910, 980
Dyed Long pulse 595, 600
Deep photocoagulation Nd:YAG cw
Long pulse 1064
Selective photothermolysis Dye Pulsed 585
2. Pigments
Selective photothermolysis Ruby Q-switch 694
Alexandrite Q-switch 755
Nd:YAG Q-switch 1064
Table 2. Lasers and light sources used for skin resurfacing
Mode Light sources
1. Ablative laser-resurfacing
Pure ablation Er:YAG laser
Vaporization Pulsed CO2 laser
Combined systems CO2/Er:YAG combination
Er:YAG laser with ablative and
thermal mode
2. Non-ablative techniques
Subsurfacing e.g. Longpulse 1320 nm Nd:YAG
laser
Er:YAG laser in thermal mode
Photorejuvenation IPL systems
Photodynamic
rejuvenation
Photosensitizer plus IPL or PDT
lamp
R. Kaufmann / Medical Laser Application 20 (2005) 103–109104
3. are also appropriate for green pigments, whereas
frequency-doubled Q-switched Nd:YAG laser irradia-
tion at 532 nm typically can improve red pigments [5].
From recent in vitro analysis it has been speculated, if
potentially hazardous compounds generated by pulsed
laser light cleavage from widely used tattoo dyes might
be toxic or even carcinogenic and thus bear yet
unreported risks [6].
Other frequent indications for Q-switched laser
irradiation are flat pigmented seborrhoic keratosis
clinically presented as senile lentigines, also solar
lentigines. However, these more macular type of age
spots typically also located on the dorsum of the hands
or in the area of the de´ collete´ can also be very
superficially dermabraded or ablated (mainly removal
of epithelium in a sense of a laser peeling) using an
Er:YAG laser [7]. Especially in these very delicate
locations laser ablation has to be performed with great
caution, since the photo-aged skin is not only atrophic
but in non-facial areas also might lack adnexal
structures required for re-epithelization. Among the
more critical fields of indications are melanocytic nevi.
Among these, without any doubt, patients presenting
with Nevus of Ota or acquired Ota-like dermal
melanocytosis usually experience considerable improve-
ments following Q-switched laser treatment series, also
in combination with prior ablative procedures or
bleaching agents [8]. Even incomplete clearing can be
considered a major help, since any improvement will be
suited to relieve much of the psychological trauma
usually associated with all disfiguring types of nevi. Also
it is proven that benign junctional melanocytic nevi
lasers can lighten the lesions, whereas they tend to recur
in deeper compound or dermal types of melanocytic
nevi. In larger congenital nevi, lasers have been used to
either reduce the pigment or to remove associated hair
growth [9,10]. Ablative lasers are routinely applied as
an alternative to mechanical dermabrasion of larger
ARTICLE IN PRESS
Table 3. Laser treatment in dermatology
Indications Photocoagulation Selective photothermolysis Ablation UV phototherapy
Pigments Vessels
Pigmentary disorders
e.g. Tattoos + +
Nevus of Ota +
Hypopigmented lesions (e.g. vitiligo) +
Vascular lesions
e.g. Teleangiectasias + +
Lip angiomas +
Senile angiomas +
Superficial varicosities + +
Varicosis of saphenous vein +a
Epithelial and adnexal lesions
e.g. Epidermal nevi +
Seborrhoic keratosis +
Viral warts +
Sebaceous gland hyperplasias +
Rhinophymab
+
Dermal lesions
e.g. Syringoma +
Xanthelasma +
Scar revision + + +
Lesions in photo-aged skin
e.g. Actinic keratosis +
Solar lentigines + +
Superficial wrinkles +
Others
e.g. Laser epilation + +
Plaque psoriasis + +
Examples of indications and involved tissue interactions.
a
As fiber guided endoluminal procedure.
b
In combination with other techniques (shaving, elektrocauterization).
R. Kaufmann / Medical Laser Application 20 (2005) 103–109 105
4. congenital nevi early in life, especially in critical areas
(e.g. periorbital or anogential skin) [11]. However,
deeper parts or excessive hair follicles cannot be
eliminated by this approach. Thus far, no reports of
malignant transformation after such treatments have
appeared, though pseudomelanoma might result from
any incomplete nevus removal and early melanoma
lesions can easily be erroneously mistaken for benign
spots. Therefore, in all suspicious melanocytic lesions
fulfilling criteria of atypia or initial malignancy,
histology is mandatory prior to any destructive type of
treatment.
Apart from other diverse dyschromias presented
clinically as hyperpigmented lesions, lasers might also
be considered as a therapeutic tool in hypopigmented
conditions. In particular, 308 nm UV-excimer laser light
has been used successfully for repigmentation of vitiligo
[12], but also in hypopigmented scars or striae alba [13].
On the other hand, vitiligo patients treated with the
intention of complete depigmentation can be relieved of
recalcitrant pigment by the use of Q-switched lasers [14].
Vascular lesions
Vascular skin disorders have been among the first
lesions treated with lasers and today a large number of
systems are available for this ailment, providing either
superficial or deep photocoagulation as well as selective
photothermolysis of smaller delicate vessels located
within the skin surface [15]. Table 1 summarizes lasers
frequently used in vascular skin lesions. A superficial
photocoagulation is achievable in the visible spectral
range (Argon, KTP, Krypton, Diode), while light of
long pulsed or continuous wave lasers in the near
infrared (e.g. 1064 nm Nd:YAG) penetrate to a deeper
level leading to larger coagulation volumes. Pulsed laser
light of appropriate wavelengths matching the absorp-
tion peaks of oxyhemoglobin (585, 590 nm) will instead
destroy fine capillary vessels leading to initial hemor-
rhage with visible immediate bluish discoloration.
Flashlamp-pumped dye lasers are mainly indicated in
children with superficial and light-red portwine stains
[16]. In childhood hemangiomas instead, only improve-
ment of superficial components can be induced, while
deeper parts require larger volumes of tissue coagula-
tion, as with cw Nd:YAG-laser light irradiation. For
many indications in daily practice however, superficial
photocoagulation with continuous or quasi-continuous
long pulse systems will usually be adequate (e.g. facial
teleangiectasias, senile angiomas) [17]. In teleangiectatic
disorders of the lower extremities, instead, the use of
laser light sources bears a higher risk of unwarranted
side effects (atrophy, depigmentation, scarring) and the
results have not been as successful as they are in facial
skin. In superficial varicosities enhanced results might be
obtained by modified pulse durations and use of more
penetrating, longer wavelengths (e.g. long pulse
Nd:YAG lasers at 1064 nm). In varicose lesser or greater
saphenous veins, endovenous laser treatment is an
increasingly used and newly developed method to induce
thrombotic occlusion via endoluminal steam bubble
formation with subsequent heat injury of the vessel wall
[18]. Apart from diode lasers (e.g. 940 nm at pulses of
15 J) 1064 nm Nd:YAG laser light is delivered with an
optical fibre in a continuous wave mode and irradiations
of 10 s duration at 10–15 W are currently used for this
photocoagulative purpose [19,20].
Epithelial, adnexal and cutaneous lesions
Among epithelial disorders, certain variants of
epidermal nevi are well suited for laser ablative
procedures, especially in areas critically in need of
dermabrasion. Other examples of lasers being used
complementarily or as an alternative to mechanical
dermabrasion are genetically determined disorders, such
as superficial lesions in Hailey–Hailey’s or Darier’s
disease [21]. Among the more localized lesions, sebor-
rhoic keratosis (including lentigo senile as superficial
variant) are easily ablated, particularly in more delicate
areas. Among the dermal and adnexal disorders,
syringomas and xanthelasmata are candidates for a
stepwise tissue sparing laser ablation [11]. In particular,
the Erbium-YAG laser can achieve a precise and fine
ablation in this subtle indication. Moreover, in solitary
or multiple sebaceous gland hyperplasia as well as in the
condition of rhinophyma, tissue ablation or vaporiza-
tion has been used. Rhinophyma is usually associated
with rosacea, where a combined conservative and
surgical approach is required. Laser applications include
the photocoagulation of teleangiectatic components in
this disorder, while vaporization has been widely
employed as an alternative to surgical or electrocaustical
shaving techniques in rhinophyma. Laser vaporization
can avoid bleeding otherwise associated with derma-
shaving or dermabrasion. As an alternative to CO2-laser
vaporization, Erbium lasers can be used in less
angiomatous tumor formations or with systems allowing
a combined hemostasis function (dual mode Er:YAG
lasers).
Lasers in photo-aged skin
In photo-aged skin, lasers are mainly used for
resurfacing purposes, to improve superficial wrinkles
related to cutaneous elastosis, to treat cysts and
comedones in Morbus Favre Racouchot or when
removing multiple solar lentigines or actinic keratoses
in a given aesthetic unit [17]. Skin resurfacing of sun-
damaged areas can be either performed by a thermal
ARTICLE IN PRESS
R. Kaufmann / Medical Laser Application 20 (2005) 103–109106
5. vaporization (pulsed CO2 laser) [22], or by using a less
heat damaging pulsed skin ablation (Er:YAG laser) even
in a single pass fashion [23]. All laser resurfacing
procedures generate injured areas analogous to erosions
or deeper excoriations with a subsequent risk of
bacterial, viral or even fungal infections, especially in
burned surfaces after thermal vaporization. Re-epithe-
lization following initial edema, exsudation and crusting
can result in longstanding erythema and post-inflam-
matory pigmentary changes (early transient hyperpig-
mentation, late lasting depigmentation) [24].
As an alternative to laser skin ablation, non-ablative
laser systems are also used in an effort to generate heat
production within the dermal connective tissue without
necessarily removing the overlying epidermal skin sur-
face. This ‘‘subsurfacing’’ or non-ablative skin remodel-
ing can be achieved by delivering light of appropriate
wavelength capable of penetrating deeply enough
through the surface while cooling the epidermis during
the light–tissue interaction in order to prevent superficial
heat injury. It attempts to stimulate dermal inflamma-
tion and subsequent collagen formation [25]. The
induction of a controlled heat injury within the dermal
connective tissue while leaving the epidermal layer intact
also circumvents a surface wounding and consecutive
‘‘down-time’’ during the phase of tissue repair. Such a
transepidermal energy delivery has been achieved by
long-pulsed subablative laser irradiation of diverse
wavelengths within the visible and infrared spectral
range paralleled by a combined surface cooling. How-
ever, apart from some tightening initiated due to an
initial edema, the results with regards to any wrinkle
improvement are less remarkable than with tissue
ablative work unless some degree of dermal fibrosis
can be induced. As an alternative to laser systems,
polychromatic flashlamp sources (IPL systems, e.g. at
690–755 nm wavelength) are also used. The removal of
age-related vascular changes or pigmentary disorders
along with a lightening of a freckled aged skin surface by
such laser or IPL-light sources is generally referred to as
‘‘type I subsurfacing’’ while the less successful skin
tightening along with some improvement in fine wrink-
ling or textural changes is termed ‘‘type II subsurfacing’’
[26] Moreover, photodynamic treatment of larger areas
of sun-damaged facial skin can achieve some degree of
tissue tightening, which is named photodynamic facial
rejuvenation [27]. Newer alternatives combine either
IPL sources with RF energy or use RF devices (selective
electrothermolysis) for the same purpose [28].
Disorders of hair growth
Among the most rapid expanding fields of laser and
light-based technological developments within recent
years are certainly hair removal procedures [29].
Photoepilation is especially helpful in fair skin types
with dark hair leading to reduction of hair growth, as
well as lightening and thinning of remaining hairs in the
majority of individuals after repeated treatment sessions
with perifollicular pigmentary changes being the most
common adverse side effects [30]. Laser systems
commonly used include the ruby- (694 nm), alexandrite-
(755 nm), diode- (810) and Nd:YAG laser (1064 nm)
[31]. However, many physicians prefer the use of non-
coherent IPL technology for this purpose [26].
Inflammatory skin diseases
Among some other inflammatory skin diseases
amenable to light therapy, in particular, psoriasis shows
a high prevalence and is a common therapeutic
challenge. It has been treated by use of ablative lasers,
but also by laser phototherapy in order to improve
chronic plaque-type lesions. Laser ablation can achieve
control of recalcitrant solitary plaques [32], whereas
308 nm UV-excimer laser light has been shown to
yield responses as expected from UVB-phototherapy
of respective circumscribed lesions and provides a
well tolerated means to clear plaques in mild to
moderate disease [33,34]. Most recently, also a non-
laser 308 nm monochromatic excimer light delivery
system has been evaluated in skin diseases for the same
purpose [35].
Scar revision
Various types of hypertrophic or depressed scar
formations, including acne or chicken pox scars, can
benefit from laser resurfacing or repetitive superficial
laser peeling. Especially in acne patients, a more
controlled and homogeneous removal of the skin surface
is possible as compared to mechanical dermabrasion.
Less pronounced cases might also be improved by using
laser light in a non-ablative technique (e.g. Nd:YAG-
laser subsurfacing) [36] Repetitive treatment sessions
and combining the procedure with other techniques,
such as punch elevations or fine excisions and subci-
sions, will add to a stepwise improvement over longer
periods. Also in keloids, laser ablation is best combined
with additional techniques (e.g. compression, steroid
injections, cryotherapy). In surgical scars laser ablation
is able to flatten uneven edges after flaps or grafts.
Moreover, in hypertrophic and teleangiectatic scars as
well as in keloids flashlamp, pumped dye lasers can be
indicated. Finally, hyperpigmented zones might benefit
from appropriate Q-switched lasers systems, and in
depigmented scars 308 nm excimer laser light has been
used successfully [13].
ARTICLE IN PRESS
R. Kaufmann / Medical Laser Application 20 (2005) 103–109 107
6. Laser-assisted procedures
In several procedures and indications, lasers are used
as adjunct devices combined with other suitable
techniques. Examples are laser-assisted grafting of
vitiligo lesions [37], laser-assisted hair grafting [38] or
laser-assisted removal of osteoma cutis [39] or sea urchin
spines [40].
Zusammenfassung
Laser in der Dermatologie – Aktueller Stand
Vielfa¨ ltige technische Entwicklungen und daraus
resultierende Therapieoptionen haben gerade in der
Dermatologie zu einer raschen und weiten Verbreitung
von Laseranwendungen gefu¨ hrt. Neben den zahlreichen
benignen Neu- und Fehlbildungen des Epithels, der
Adnexe, der Gefa¨ ße und anderer Gewebekomponenten
stellen auch viele krankheitsassoziierte oder erworbene
Hautla¨ sionen, ebenso Vera¨ nderungen der Altershaut
oder Sto¨ rungen des Haarwuchses Indikationen fu¨ r eine
Lasertherapie dar. So kann in den meisten dieser Fa¨ lle
mithilfe moderner Lasersysteme eine Besserung erzielt
werden, sei es durch den Einsatz geeigneter Wellenla¨ n-
gen bei vaskula¨ ren oder pigmentierten Hautvera¨ nde-
rungen oder durch die weit verbreitete Laserablation
zum Abtragen umschriebener La¨ sionen oder zum soge-
nannten Resurfacing, insbesondere von lichtgescha¨ digten
Hautarealen. Daher sind wir heute in der Dermatologie
mit einem besonders breiten Indikatonsspektrum fu¨ r
potentielle Laseranwendungen konfrontiert. Allerdings
haben sowohl die Einfu¨ hrung hochenergetischer Blitz-
lampen (IPL-Technologie) wie auch nichtoptischer
Radiofrequenz-Gera¨ te oder der photodynamischen
Therapie die heutigen Konzepte der Therapie insbeson-
dere auf dem Gebiet der Behandlung altersassoziierter
Hautvera¨ nderungen im Hinblick auf den Lasereinsatz
relativiert.
r 2005 Elsevier GmbH. All rights reserved.
Schlu¨sselwo¨rter: Hauterkrankungen; Lasertherapie; U¨ bersicht
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R. Kaufmann / Medical Laser Application 20 (2005) 103–109 109