The document discusses dental ceramics and porcelain. It describes the composition of dental porcelain including feldspathic and aluminous porcelains. It discusses classifications of dental porcelain based on firing temperature, firing method, and clinical application. The document also discusses metal-ceramic restorations and their benefits and drawbacks. Finally, it summarizes different types of all-ceramic restorations including powder-slurry, castable, machinable, pressable, and infiltrated glass ceramics.
Porcelains used in metal ceramics /certified fixed orthodontic courses by Ind...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
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Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
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Porcelines used in metal ceramics /certified fixed orthodontic courses by Ind...Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable
all ceramic crowns /certified fixed orthodontic courses by Indian dental academyIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
dental ceramics silicate ceramics and oxidceramics/ oral surgery courses Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Porcelains used in metal ceramics /certified fixed orthodontic courses by Ind...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Porcelines used in metal ceramics /certified fixed orthodontic courses by Ind...Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable
all ceramic crowns /certified fixed orthodontic courses by Indian dental academyIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
dental ceramics silicate ceramics and oxidceramics/ oral surgery courses Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Dental all ceramic restorations /orthodontic straight wire techniqueIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
There have been several changes since inception in the field of dental ceramics. Need for newer materials with improved aesthetics, flexural strength and optical properties made it necessary for introduction of advanced technology in fabrication of dental ceramics.
Dental Ceramics and Porcelain fused to metal isabel
Dental porcelain (also known as dental ceramic) is a dental material used to create biocompatible lifelike dental restorations, such as crowns, bridges, and veneers.
Dicor and cerestore /certified fixed orthodontic courses by Indian dental ac...Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
Dental ceramics /certified fixed orthodontic courses by Indian dental academy Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
Metal ceramics /certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Dental all ceramic restorations /orthodontic straight wire techniqueIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
There have been several changes since inception in the field of dental ceramics. Need for newer materials with improved aesthetics, flexural strength and optical properties made it necessary for introduction of advanced technology in fabrication of dental ceramics.
Dental Ceramics and Porcelain fused to metal isabel
Dental porcelain (also known as dental ceramic) is a dental material used to create biocompatible lifelike dental restorations, such as crowns, bridges, and veneers.
Dicor and cerestore /certified fixed orthodontic courses by Indian dental ac...Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
Dental ceramics /certified fixed orthodontic courses by Indian dental academy Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
Metal ceramics /certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Dental Ceramic in Conservative Dentistry and EndodonticsSNISHAMG
Detailed description on classification of dental ceramic,composition,advantages,disadvanatages,all ceramic system,CAD-CAM,fabrication of porcelain inlay
Introduction
CERAMICS : An inorganic compound with non-metallic prosthesis typically consisting of oxygen and one or more metallic or semi-metallic elements that is formulated to produce the whole part of a ceramic based dental prosthesis. – GPT 7.
The word Ceramic is derived from the Greek word “keramos”, which literally means ‘burnt stuff’, but which has come to mean more specifically a material produced by burning or firing.
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Brief presentation of the basics of ceramics used in dentistry (classification and properties). Made for dentistry 2nd year prosthetic technology subject lecture.
Evolution of all ceramics&recent advances (2)/ dental coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
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ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
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The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
Couples presenting to the infertility clinic- Do they really have infertility...
108748 34 ppt
1. The university of GeorgiaThe university of Georgia
p.dental materialsp.dental materials
by:Nisreen kareemby:Nisreen kareem
(1330188)(1330188)
2. DENTAL CERAMICSDENTAL CERAMICS
GenerallyGenerally the wordthe word ceramicceramic is used to name any materialis used to name any material
having bothhaving both metallicmetallic andand non-metallicnon-metallic ions in itsions in its
compositional formulacompositional formula
e.g. cements, gypsum, porcelain and glassese.g. cements, gypsum, porcelain and glasses
3. DENTAL PORCELAINDENTAL PORCELAIN
Dental Porcelain = an early type of dental
ceramics that has been modified to improve
its properties
APPLICATIONS OF PORCELAIN
1. Porcelain denture teeth
2. Porcelain jacket crown
3. Porcelain inlay
4. Porcelain veneer
5. Porcelain fused to metal prosthesis
6. Implant material
4. COMPOSITIONCOMPOSITION
OFOF DENTALDENTAL PORCELAINPORCELAIN
A. Feldspathic porcelain
Fired material is composed of
1. Glassy phase (Vitreous matrix made of feldspars)
Feldspars are mixture of Anhydrated alumino-silicates
of both…. Potash feldspar = K2O. Al2O3. 6 SiO2 And
.… Soda feldspar = Na2O. Al2O3. 6 SiO2
2. Dispersion of crystalline phase (mineral phase including
silica and other oxides)
Main characters
• Void of kaolin
• Technically it is a glass rather than true porcelain
• They are translucent
5. COMPOSITIONCOMPOSITION
DENTAL PORCELAINDENTAL PORCELAIN
B. Aluminous porcelain
The porcelain material contains 40-50% alumina
crystals (Al2O3) in a low-fusing glass matrix.
High-Ceram
– The dispersed alumina particles are much stronger with
higher modulus of elasticity and coefficient of thermal
expansion than those of the glassy matrix.
– Presence of alumina makes the material opaque. (used
only as coping beneath regular porcelain)
In-ceram alumina
– It is not only a kind of infiltrated glass ceramic, but
also considered as one of the aluminous porcelains.
6. Classification of Dental PorcelainClassification of Dental Porcelain
A. According to their fusion temperatures
1- High-fusing (1300-1400o
C)
2- Medium-Fusing (1100-1300o
C)
3- Low-Fusing (850-1100o
C)
4- Ultra-Low- Fusing (< 850o
C)
1 & 2 are used for denture teeth production
3 & 4 are used for crown and bridge construction
B. According to the method of their firing
1- Atmospheric firing
2- Vacuum firing (lower % of porosity)
7. C. According to their clinical applications
1. Core porcelain:
Used to form the basal layer of jacket crown
2. Dentine or Body porcelain:
More translucent, used to build the body of crowns
3. Enamel porcelain:
The most translucent, used to form the incisal edges
Classification of Dental PorcelainsClassification of Dental Porcelains
Manipulation Of Dental PorcelainManipulation Of Dental Porcelain
(Powder-slurry technique)(Powder-slurry technique) Watch the videoWatch the video
8. CHARACTERSCHARACTERS OF DENTAL PORCELAINOF DENTAL PORCELAIN
1. Biological Properties:
• Inert has no interaction with surrounding soft tissue
(biocompatible)
2. Interfacial Properties:
• Not adhere chemically to dental cements
3. Chemical properties:
• Not soluble in oral fluids and resist acid attach
• Both hydrofluoric acid and stannous fluoride can cause
an increase in surface roughness
4. Mechanical Properties:
• Brittle
• Low DTS and fracture toughness
• Hard, can cause wearing of opposing dentition
9. CHARACTERSCHARACTERS OF DENTAL PORCELAIN (Cont.D)OF DENTAL PORCELAIN (Cont.D)
5. Thermal Properties:
• Low thermal diffusivity
• Coefficient Of thermal expansion similar to that of
enamel and dentine
6. Esthetic properties:
• Excellent esthetic, and color matching
• Difficult to be stained
7. Practicability:
• Sensitive manipulation technique, Requiring skilled
operator and Special equipments
• Firing shrinkage is always, So operator should build up
the restoration to a bigger size that allows shrinkage
11. These restorations are composed of; Metal substructure
(Coping) supporting a ceramic veneer those are chemically
and mechanically-bonded together
Metal-Ceramic RestorationsMetal-Ceramic Restorations
Metal
substructure Opaque
porcelain
Body (dentine)
porcelain
Incisal (enamel)
porcelain
12. Benefits and drawbacks of the metal-ceramicBenefits and drawbacks of the metal-ceramic
restorationsrestorations
Advantages:
1. Stronger than porcelain crowns
2. Can be used for constructing long-span bridges
3. Good esthetic and less liable to staining
4. High wear resistance
5. Long term clinical durability (2.3-7.5 years)
6. Less preparation is required in comparison to all-
ceramic restorations
Disadvantages:
1. Sufficient metal bulk (0.3 mm) is required for proper
rigidity
2. Metal display could result at the thin marginal area
3. Using opaque porcelain is essential to overcome the
metal color
4. Special properties of the metal coping are required for
proper results (see the next section….)
13. Requirements of the metal copingRequirements of the metal coping
1. Has melting temperature higher than the porcelain firing temp. (to
avoid sagging at the time of porcelain firing)
2. Able to form an oxide layer that provides the chemical bond to
porcelain (presence of indium or tin in high noble alloys is essential
for that purpose. e.g gold alloys)
3. Has coefficient of thermal expansion a little bite higher than that
of porcelain (to provide higher mechanical bond)
4. Has no greening effect on the porcelain color
5. High high elastic modulus (E) to resist the bending and the
cracking of porcelain under masticatory force.
14. Bonding of porcelain to the metal copingsBonding of porcelain to the metal copings
1. Mechanical bonding:
- Infiltration (flow) of the fused
ceramic into the surface irregularities
of the metal coping.
- Sandblasting of the metal surface or
using plastic beads during waxing
are important for this issue.
Metal
Porcelain
Oxide layer
Irregularities
15. Bonding of porcelain to the metal copingsBonding of porcelain to the metal copings
2. Chemical bonding:
- Ionic bond between the metal oxide layer and the opaque
porcelain.
- Metal degassing is important for oxide formation, removing the
surface contaminants and greases.
- Thin oxide layer (in case of noble alloys) provides stronger
bond than the thick one (in case of base metal alloys).
3. Coeff. of thermal expansion mismatch:
As a result of higher metal contraction on cooling ,
- The fused porcelain will be sucked (attracted) more strongly
into the metal surface irregularities.
- Residual compressive stresses will developed in and strengthen
the porcelain.
16. 4. Application of a special bonding agent:
Certain metal system (electro-forming) requires the application
of specific bonding paste before building-up the porcelain.
Bonding of porcelain to the metal CopingsBonding of porcelain to the metal Copings
17. Production of Metal copingsProduction of Metal copings
A. Casting of pure metals or metallic alloys
1- Commercially-pure titanium (CP Ti)
2- High gold alloy 3- Gold-palladium alloy
4- Palladium-silver alloy 5- High palladium alloys
6- Nickel- chromium alloy
B. Burnishing and heat treating metal foils on a die
1- Platinum foil 2- Gold foil 3- Captek system
C. Electro-deposition of metal on a duplicate die
D. CAD-CAM processing of a metal ingot
19. Advantages ofAdvantages of
all-ceramicall-ceramic
restorationsrestorations
Biocompatibility
Superior esthetic (No metal display)
Good bonding (cohesion) between the ceramic coping
and the porcelain veneer
Acceptable mechanical properties
Superior hardness that provides the restoration its
wear resistance
Resist the degradation in oral fluids
Low thermal diffusivity
Most systems could be used for constructing inlays,
onlays and crowns
20. Disadvantages of all-ceramicDisadvantages of all-ceramic
restorationsrestorations
High cost of the materials and
the processing equipments
Excessive tooth reduction is
needed
Most systems utilize feld-
spathic porcelain coating to
provide the desired color and
contour
Most systems are not suitable
to construct long span bridge
22. 1.1. Powder-slurry ceramicsPowder-slurry ceramics
The material presents as powder to be mixed
with liquid forming a slurry that is used to build
the restoration up
e.g. (1) Optec HSP, (2) Duceram systeme.g. (1) Optec HSP, (2) Duceram system
23. 2. Castable ceramics2. Castable ceramics
Ceramic ingot is fused and cast in a
refractory (investment) mold made
by the lost wax technique
e.g. (1) Dicor, (2) Dicor Plus, (3) Castable Apatitee.g. (1) Dicor, (2) Dicor Plus, (3) Castable Apatite
24. 3. Machinable ceramics3. Machinable ceramics
CAD- CAM technology
The prepared tooth is optically impressed (pictured
using intra-oral camera). The restoration is design over
that image by the aid of computer……Then
Ceramic blocks are carved into restorations by the aid
of computer-controlled milling machine
e.g. (1) Cerec Vitablocks-mark I, (2) Cerec Vitablocks-mark II,e.g. (1) Cerec Vitablocks-mark I, (2) Cerec Vitablocks-mark II,
(3) Dicor MGC Blocks(3) Dicor MGC Blocks
26. 3. Machinable ceramics3. Machinable ceramics
Copy-Milling technology
The prepared tooth is impressed poured in gypsum
to form a die.
A wax pattern is built over the die……Then Ceramic
blocks are carved into restorations by the aid of
computer-controlled milling machine that is guided by
the constructed wax patter
e.g. (1) Celay blocks (2) Lava Zerconia, (3) Cercone.g. (1) Celay blocks (2) Lava Zerconia, (3) Cercon
28. 4. Pressable ceramics4. Pressable ceramics
Ceramic ingots are softened by heat and
pressed into a refractory mold using
special alumina injector
e.g. (1) Optec Pressable Glass Ceramic, (2) IPS Empress ,(3) Empress 2,e.g. (1) Optec Pressable Glass Ceramic, (2) IPS Empress ,(3) Empress 2,
(4) IPS e.max press(4) IPS e.max press
29. 5. Infiltrated glass ceramics5. Infiltrated glass ceramics
A porous crystalline slip is
formed by fusion of
Metallic particles at high
temperature.
A Glass coat is then fused
over the porous slip to
infiltrate into the pores and
strengthen the structure.
Veneering porcelain is then
required to provide the
desired shade and contour
e.g.(1) In-Ceram Alumina, (2) In-Ceram Spinel, (3) In-Ceram Zerconiae.g.(1) In-Ceram Alumina, (2) In-Ceram Spinel, (3) In-Ceram Zerconia