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.
Accurate shade selection that allows restorations to match the natural dentition positively influences the patients appearance and esthetic self-esteem.
Patients are demanding contemporary esthetic dentistry, which has prompted the industry to continuously raise the bar with regard to esthetic detail
Being Prosthodontists, we deal with restorative dentistry. Restorative dentistry is a blend of science and art. Aesthetics which is one of the main concerns in restorative dentistry depends totally upon the proper shade matching of prosthesis with surrounding structures, which can be teeth or soft tissues.
Color matching is done, for better compliance.
Perception of color is a physiological response by human eyes and sensory structures of the brain towards the light reflected from an object.
shade selection seminar
Yasir A. alnakib
supervised by : prof. Dr. ammar A. ali
department of conservative dentistry
college of dentistry
university of al-mustansiriya
OPTICAL PROPERTIES OF DENTAL MATERIALS AND SHADE SELECTIONHri M
This presentation describes the optical properties of dental materials, the different types of colour models, how colour is produced, dimensions of colour, problems in colour perception, shade guides available in markets and rules in shade selection
Sceince of colour and Shade Selection by Dr. Vaibhav BudakotiVAIBHAVBUDAKOTI1
The modern dentist must be trained to detect differences in color and shades in individual teeth, select a shade that reflects the color and exact shade, transmit this information to a dental technician, and be able to deliver an esthetic restoration.
Accurate shade selection that allows restorations to match the natural dentition positively influences the patients appearance and esthetic self-esteem.
Patients are demanding contemporary esthetic dentistry, which has prompted the industry to continuously raise the bar with regard to esthetic detail
Being Prosthodontists, we deal with restorative dentistry. Restorative dentistry is a blend of science and art. Aesthetics which is one of the main concerns in restorative dentistry depends totally upon the proper shade matching of prosthesis with surrounding structures, which can be teeth or soft tissues.
Color matching is done, for better compliance.
Perception of color is a physiological response by human eyes and sensory structures of the brain towards the light reflected from an object.
shade selection seminar
Yasir A. alnakib
supervised by : prof. Dr. ammar A. ali
department of conservative dentistry
college of dentistry
university of al-mustansiriya
OPTICAL PROPERTIES OF DENTAL MATERIALS AND SHADE SELECTIONHri M
This presentation describes the optical properties of dental materials, the different types of colour models, how colour is produced, dimensions of colour, problems in colour perception, shade guides available in markets and rules in shade selection
Sceince of colour and Shade Selection by Dr. Vaibhav BudakotiVAIBHAVBUDAKOTI1
The modern dentist must be trained to detect differences in color and shades in individual teeth, select a shade that reflects the color and exact shade, transmit this information to a dental technician, and be able to deliver an esthetic restoration.
Major challenges in cosmetic dentistry are to accomplish appropriate and satisfactory reproduction of natural shade of teeth.1
The kind of shade guide, individual ability to choose shades and conditions the choice is made under, all have influence on reliability and accuracy of the procedure.
Shade selection in dental practice is an important but difficult task.
Dentists are challenged to satisfy the aesthetic requirement of patients when they select the shades for fabrication of prosthesis. Most dentists are usually not trained for shade selection.2
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
Colour and Shade Selection in dental practiseSNEHA RATNANI
Shade selection is an extremely important aspect of aesthetic dentistry.One must have thorough knowledge of colour and shade selection before carrying out any restorative procedures in patients mouth. A brief seminar on colour and shade selection has been penned down here. Hope it helps u fetch some information regarding shade selection and colour in dentistry.
Color of Natural Teeth and shade selection in dentistry.Keerat Kuckreja
Shade selection in dentistry.
Hue, Chroma, Value.
Munsell color system, CIELAB color system.
Optical characteristics of natural teeth
shade matching.
illumination and sources.
VITA shade guide.
After its discovery as a dental material, zirconia, under various forms, is used worldwide in order to replace metal-ceramic restorations.
It is obvious that the usage of ceramic-zirconia versus metal-ceramic restorations it is more suitable due to biocompatibility, the appearance as close as possible to the natural teeth.
Monolithic zirconia restorations proved better mechanical properties, but they offer a limited tooth color reproduction, while the final surface state and wear behavior still raise some questions.
concept of Color in prosthodontics / cosmetic dentistry trainingIndian 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.
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.
Major challenges in cosmetic dentistry are to accomplish appropriate and satisfactory reproduction of natural shade of teeth.1
The kind of shade guide, individual ability to choose shades and conditions the choice is made under, all have influence on reliability and accuracy of the procedure.
Shade selection in dental practice is an important but difficult task.
Dentists are challenged to satisfy the aesthetic requirement of patients when they select the shades for fabrication of prosthesis. Most dentists are usually not trained for shade selection.2
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
Colour and Shade Selection in dental practiseSNEHA RATNANI
Shade selection is an extremely important aspect of aesthetic dentistry.One must have thorough knowledge of colour and shade selection before carrying out any restorative procedures in patients mouth. A brief seminar on colour and shade selection has been penned down here. Hope it helps u fetch some information regarding shade selection and colour in dentistry.
Color of Natural Teeth and shade selection in dentistry.Keerat Kuckreja
Shade selection in dentistry.
Hue, Chroma, Value.
Munsell color system, CIELAB color system.
Optical characteristics of natural teeth
shade matching.
illumination and sources.
VITA shade guide.
After its discovery as a dental material, zirconia, under various forms, is used worldwide in order to replace metal-ceramic restorations.
It is obvious that the usage of ceramic-zirconia versus metal-ceramic restorations it is more suitable due to biocompatibility, the appearance as close as possible to the natural teeth.
Monolithic zirconia restorations proved better mechanical properties, but they offer a limited tooth color reproduction, while the final surface state and wear behavior still raise some questions.
concept of Color in prosthodontics / cosmetic dentistry trainingIndian 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.
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.
Description :
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.
Lasers in dentistry (2)/ orthodontic course by indian dental academyIndian 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.
Anterior dental esthetics......./certified fixed orthodontic courses by India...Indian dental academy
Description :
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
Color a new dimension 2 / dental implant 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.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
Dentinal hypersensitivity /certified fixed orthodontic courses by Indian den...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
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.for more details please visit
www.indiandentalacademy.com
Physical and Chemical Properties of Dental Materials part - 2.pptxDr.shiva sai vemula
This SlideShare serves as a continuation of the previous part. It covers optic properties, refractive index, metamerism, fluorescence, light interphases, biomaterials, and concepts of tarnish and corrosion.
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.
An overview of color vision with its Theories , mechanism and important concepts. Brief explanation on color vision disorders and tests use for screening and diagnosis. by DR.GAGAN and DR. NEENET
Presentation 1 by Abhiraj And Abhishek kumar.pdfAmitTiwari52430
Rough composite fillings scatter more light thus appear opequewhere as smooth highly polished filling do not.
Esthetics play a very important role in modern dental treatment. The ideal restorative material should match the color of the tooth it restores. In maxillofacial prosthetics the color of the gums,
external skin and the eyes have to be duplicated. Clinically in the operatory or dental lab, color selection is usually done by the use of shade guides.
Un paper novedoso acerca de 5 parámetros objetivos para la determinación y selección del color, incluyendo características propias e individuales de cada paciente y cada caso
Similar to Shade selection/ academy laser dentistry (18)
Opportunity for Dentists (BDS/MDS )to relocate to United kingdom -Register as a DENTAL HYGIENIST/ DENTAL THERAPIST without Board exams and after approval you can register in GDC as a DH/DT and start working as a DH/DT Immediately and get paid.
You can complete the whole process in 3-4 months.Salary range for DH/DT is around 2500-3500 Pounds per month.
Eligibility / requirements-
1. An International English Language Testing System (IELTS) certificate
at the appropriate level.(Within 2 yrs of application date )
2: A recent primary dental qualification that has been taught and examined in English..(Within 2 yrs of application date )
3: A recent pass in a language test for registration with a regulatory authority in a country where the first language is English.
If you are interested Please contact us for more details.
1ST, 2ND AND 3RD ORDER BENDS IN STANDARD EDGEWISE APPLIANCE SYSTEM /Fixed ort...Indian 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.
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.
I –Aligners are made with FDA approved transparent thermoplastic materials using 3D scanning, 3D Printing and finally Trays with Pressure vacuum formers.
Dear Doctor,
Indian Dental Academy Now offers comprehensive online Orthodontics course.
Course includes:
1.whiteboard lecture presentations
2.Case Discussions
3.with hundreds of pictures.
4.Demo on Models
5.Demo on Patients
6. subtitles in your own language
12 months unlimited access and support @350 USD only.
For Demo please visit :www.idalectures.com/preview/
For more details visit: www.idalectures.com
Please contact us for any clarifications:
idalectures@gmail.com
indiandentalacademy@gmail.com
Thanks & Regards
Indian Dental Academy
--
Indian Dental Academy
Leader in continuing dental education
www.indiandentalacademy.com
skype:indiandentalacademy
+919248678078
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
Cytotoxicity of silicone materials used in maxillofacial prosthesis / dental ...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
Diagnosis and treatment planning in completely endntulous arches/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
Properties of Denture base materials /rotary endodontic 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
Use of modified tooth forms in complete denture occlusion / dental implant...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
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
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
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
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
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
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The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The French Revolution Class 9 Study Material pdf free download
Shade selection/ academy laser dentistry
1. INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com
www.indiandentalacademy.com
2. THE MEANING OF SHADE SELECTION
COLOUR Energy wave of specific wave length
Shade Matching Matching two objects that reflect similar
wave lengths of electromagnetic
spectrum
www.indiandentalacademy.com
3. Wave lengths of electromagnetic spectrum perceived by human eye
-Visible light
• Ultraviolet rays
• x-rays
• gamma rays
• Infrared
• Microwaves
• Television &
Radio waves
380 760
www.indiandentalacademy.com
5. An understanding of the nature of light & how the eye perceives
& the brain interprets light as colour is important for successful
shade selection
www.indiandentalacademy.com
6. Perception of colour
3 types of cones- sensitive to : Blue (short)
green (Medium)
Red(long)
Ultimate colour depends on the relative amount of stimulation of the
three receptors www.indiandentalacademy.com
7. Seeing colours is possible ,
since all objects absorb certain
parts of the light, while
reflecting or transmitting other
parts
A surface appears to be of a
particular colour when it
reflects that wave length and
absorbs all others
With out light there is no colourwww.indiandentalacademy.com
8. •A surface appears white when it reflects the entire spectrum of
wavelengths.
•A surface appears black when it absorbs all light rays
•A surface appears grey when all the wave lengths of light
are reflected and absorbed in equal measure
www.indiandentalacademy.com
9. Additive and Subtractive Colours
Additive Colours =light mixture system
Primary colours
•Red
•Green
• Blue
Secondary Colour
•Yellow
•Cyan
•magenta
www.indiandentalacademy.com
11. Dimensions of colour
Hue
The name of the color
– Could be red, green, yellow
• This would depend on the wave length of
the reflected light.
• Short wave length = Violet Hue
• Long wave length = Red Hue
• Studies show that most natural teeth fall
in a Hue range between yellow and
yellow-red – 6YR-9.3YR
www.indiandentalacademy.com
12. Dimensions of colour
Value
Amount of Gray in the Hue
• Most important factor in tooth shade
matching.
– Tooth with high value looks vital (alive)
– Tooth with low value looks gray
(lifeless)
• Is a direct consequence of the amount of
light energy an object reflects or transmits.
• Studies have shown most teeth fall in a
range from 4-8
www.indiandentalacademy.com
13. Dimensions of colour
Chroma
Saturation of the Hue
• High Chroma = High amount of Hue
with little dilution
• Low Chroma = Small amount of Hue
with large amount of dilution
– Studies have shown that teeth have a
Chroma range of 0-7
– An achromatic shade would then have a
Chroma number near 0
www.indiandentalacademy.com
14. Dimensions of colour
Maverick:
•Defined as any color or colors located in dentin but not directly responsible for hue.
•They are called maverick colors because they are strewn throughout the dentin
without organization.
•Found in dentin of most teeth.
•Formed from chemical reactions between organic and inorganic materials contained
in dentin. External tooth environment, including saliva and occlusion, together with
diet, blood and nerve supply to tooth are sufficient to cause interactions.
•They combine with hue, chroma and are projected through enamel to be perceived as
composite tooth colour.
www.indiandentalacademy.com
15. Munsells colour system
Value : along long axis
Hue : along rim of the wheel
Chroma: increases from center to periphery
www.indiandentalacademy.com
16. Munsells colour system -Hue
•Ten basic hues; 5 principal hues & 5 intermediate
•Each hue segment-10 major segments- further 100 fractions
•Total of 10,000hues
www.indiandentalacademy.com
17. Munsells colour system -Value
•Ten basic values: pure black at bottom
pure white at the top
•Each further divided into 100 segments
•Total of 1000 values
www.indiandentalacademy.com
18. Munsells colour system -Chroma
•Purest colour arranged towards
periphery
•Degree of possible saturation of
a hue is variable for each level
of value
-irregular shape of munsell
solid
www.indiandentalacademy.com
19. Munsells Notation
•The designation of any particular color located in the Munsell color
solid is given by the notation
HV/C
H-hue
V-value
C-chroma
•Color of natural tooth is in the range of 6YR4/10 - 9.3Y8/7
www.indiandentalacademy.com
20. CIE L*A*B
•In this system all the colors are arranged in one plane on which
the lightness values can be changed vertically
•L* (vertical axis) defines brightness or darkness of color = value in
Munsell system
• a*b* represent chromacity
www.indiandentalacademy.com
21. CIE L*A*B
•The color difference between two colors can be calculated as
∆E= ∆ L 2
* + ∆ a 2
* + ∆ b 2
*
•The of advantage this system over
the Munsell system is equally
arranged gradations in color space
•Any colour is represented by a
unique point in space denoted
by numerical representation of
the coordinates
L*a*b color chart
www.indiandentalacademy.com
25. With increasing opacity of teeth the grey scale value decreases and the brightness
value increases.The Higher the brightness values,the lower the transparency
becomes.The more transparent a tooth the more grey it appears
www.indiandentalacademy.com
26. B &C -Translucent areas of the teeth appear grey
A B C
A-opaque incisal edge appears white
www.indiandentalacademy.com
27. The opal effect
Fine particles in enamel (hydroxyapatite crystals) responsible for opal effect
Fine particles reflect short wave lengths and allow longer wave lengths to pass through
-hence tooth shows •Bluish areas in reflected light
•Orange red areas in transmitted areas
In reflected light In transmitted light
www.indiandentalacademy.com
28. Photoluminenescence : fluorescence & phosphorescence
Phosphorescence : continue to emit
visible light after being struck by U-V
light
Fluorescence: emit visible light only as
U-V rays strike them
•Human enamel is fluorescent
•Takes place even under day light conditions but usually goes unnoticed
•Becomes pronounced under high energy U-V light environment eg. Discos
•Lack or abundance of fluorescing agents in restorations may produce undesirable
effects
www.indiandentalacademy.com
29. Tooth colors are situated in the upper lightness area of the color
space, well defined as yellow-red color tones. The shape of this tooth
color space resembles a banana in an upright position.
This signifies that all tooth shades - regardless of perception - can be
clearly defined. Knowing the position of the color space of natural teeth
provides the basis for reliable and accurate shade determination and
allows for aesthetically perfect tooth reproduction.
The tooth color space
www.indiandentalacademy.com
30. studies of tooth shades
have shown: the
distribution of natural
tooth shades - just like
all "populations" in
nature - comes close to
a normal distribution.
That is, certain tooth
shades - defined by the
parameters of value,
chroma and hue - occur
more frequently whereas
other - more extreme -
kinds of shades are
found quite rarely.
www.indiandentalacademy.com
32. Cone color perception decreases the longer an object is looked at.
– The Hue range gets less and less (Gets grayer)
– This suggests that one should not stare at a
tooth but look briefly and then look away
When looking away, you should look at a
neutral or gray background to allow cone
sensitivity to return
Factors Affecting Color Perception
Color Adaptation:
www.indiandentalacademy.com
33. Factors Affecting Color Perception
Complementary Colors affect each other:
• When placed side-by-side they may
appear to increase Chroma
• Hue and Chroma selection may be
affected by the color of lipstick or make-up
the patient is wearing.
Deceptive Color Perception:
www.indiandentalacademy.com
34. Factors Affecting Color Perception
Affects about 8% of the male population
– Very few cannot see color at all, most have an inability to detect the
differences in Chroma - This is called monochromatism
– Requires then an alternate method of shade selection.
Color Blindness:
• Use of office staff
• Special training to overcome or adapt
Colour vision test plate
You should be able to see the no.
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35. Factors that influences the color of
an object?
• The physical properties of the
object
• The nature of the incident light in
which the object is viewed
• The relationship or close
association to other colored objects
• The color background of the
viewer
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36. The nature of the incident light in which the object is viewed
Colours of two objects appear to match under one set of viewing
conditions but differ under different light conditions - metamerism
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37. The nature of the incident light in which the object is viewed
Clinical significance :tooth & restorative material of a
differing shade may appear matched under certain light
conditions , but may show discrepancy in day light
tooth
restorative
Appear Matched
mismatch
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38. Ideally light source for shade matching:
•Should have complete colour content
•Enough intensity
•Comfortable to the eye
•Standard- unchanging in quality & quantity
Northern exposure sunlight at mid day with slightly overcast
sky considered ideal- equal blend of all wave lengths of light
Unfortunately all clinics may not have access to natural sunlight
and even if available,may not have adequate intensity .
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39. Most common lighting is
either:
– Incandescent
– Fluorescent
• Neither is pure white light
– Incandescent is higher
in yellow than blue
– Fluorescent is higher in
blue waves
Light in the Dental Office
Chair light is not recommended for colour matching as it is over
powering and interferes with fine discrimination of three
dimensions of colour
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40. The concept of Colour Rendering Index (CRI):
•Capacity of artificial light to reproduce natural light
•White light has CRI of 100- is constituted of equal energies
from all the three primaries of the spectrum ie. Red , blue,
green.
•Artificial sources with CRI 90 are adequate
Warm white fluorescent –CRI 56
Cool white fluorescent –CRI 68
Colour corrected fluorescent CRI –above 90
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41. Amount & location of lighting
Ideal amount of light –1500 lux
-This over comes influence of ambient room light
-not so intense that slight colour differences are
overcome or washed out
Location of light
•All luminous ceiling
Surrounding environment
Bright coloured environment
Interfere with proper colour match
Light grey –ideal background
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42. Selection should be made when subject tooth and adjacent teeth are
clean.
Principles of Shade Selection
Selection should be made at the start of the appointment
before operator’s eyes get tired
Cosmetics
should be
removed and
bright colored
clothes
covered
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43. The shade tab should be Held as close to the subject tooth as
possible.This lets the incident light hit both at the same angle
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44. A blinder of neutral grey may be used to separate the tooth
from its surrounding - hence no near by colour can
interfere in judgment
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45. • Use multiple light sources or have an operatory of
color corrected lights
• View the subject tooth quickly
– Do not stare at the tooth-eye accommodates and becomes
biased
– Move your eyes away and look at a neutral color
(light blue or grey)to readapt vision to orange – yellow
portion of spectrum
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46. Shade selection for resin composites
•Standard shade guides e.g.. Vita &
use corresponding shade of
composite material
•Shade guides supplied by the
respective manufacturers
•Custom shade tabs
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48. Translucent bodies demonstrate the property of changing their
colour with increased thickness.Colours become darker and
more intense
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50. Conversion chart
Composite materials usually carry
Shade information in one system
(e.g..A3, i.e..vita)
However if the clinician does not
have the same shade guide a
conversion chart may be used
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51. Types of Shade Guides
Hue – Chroma shade guide
Allow an approximate Colour shade to be given
Eg. Vita Lumin vaccum – 15 shade tabs
Mass shade guide
Allow an more accurate shade matching
Eg. Vita 3D master- 26 shade tabs
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52. Vita lumin
Four basic hues of Vita Shade guide
A Brownish tones
B Yellowish tones
C Greyish tones
D Reddish tones
A1, A2, A3,A3.5,A4 represent
increasing chroma
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53. Vita lumin
The following arrangement of shade tabs indicates decreasing value
B1*A1*B2*D2*C1*C2*D4*A3*D3*A3.5*B4*C3*A4* C4*
Brightest Darkest
• Begin by selecting hue.Maximum
chromas of hue are selected-
A4,B4,C4,D4 and compared against the
teeth.
•After basic hue has been determined
chroma is chosen
Sequence of Shade Selection
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54. The tooth colors of conventional shade
systems do not feature systematic
colorimetric distribution in the tooth color
space.
Shade guides – Vitapan 3D Master
VITAPAN 3D-MASTER provides a systematic
uniform and complete colormetric coverage of
the tooth color space.
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55. Shade guides – Vitapan 3D Master
Tolerance cloud
Rationale: The most frequent tooth Colours are located in the middle
Human eye can tolerate greater variation in value than in
chroma or hue
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56. In the first step of the shade taking procedure the value
(lightness) is determined. Select the value level from the five
value groups (levels 1 - 5) that is closest to the value of the tooth
to be compared.
Vitapan 3D Master
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57. Pull out the medium shade sample (M) from the selected value group.
Then the chroma (levels 1 2,3) is determined. Select the color sample of
the selected M group that is closest to the tooth to be compared.
Vitapan 3D Master
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58. In the third step the hue (L, M,
R) is determined. Check
whether the natural tooth
displays a "more yellowish" (L)
or "more reddish" {R) shade
than the color sample of the M-
group that has been selected in
the second step. Now the best
matching shade sample is
determined and the information
is recorded in the color
communication form.
Vitapan 3D Master
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59. 2 L 1.5
Value Hue Chroma
Color communication form
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60. Chromascop
Based on the concept that tooth shade blends in with overall
appearance of individuals.
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61. Chromascop
According to this concept individuals can be classified into two types
•Amber reflectors
Spring type , autumn type
•Grey reflectors
Summer type ,Winter type
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62. Spring types
•200 shade group
•Golden to medium blond hair
•Light grey eyes
•Pink pale skin
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63. Autumn types
•(300 shade group)
•Medium blonde- red hair
•Dark blue eyes to green – blue eyes
•Pale reddish skin
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64. Summer types
•100 shade group
•Ash grey to medium brown hair
•Slightly pink to pale skin
•Grey-blue eyes
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65. Winter types
•400 & 500 shade group
•Dark brown to black hair
•Icy blue/green eyes
•Amber skin
Dark skinned individuals -Asians allocated to this type
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66. The Noritake Shade Guide
The Noritake Shade Guide has.
a) Intermediate shades (NP1.5 , NP2.5)
These two shades are often seen in natural teeth:
NP1.5: The chroma is between A1 and A2 shedes - the hue
corresponds to the slightly reddish shades.
NP2.5: The chroma is between A2 and A3 shades - the hue
corresponds to the slightly reddish shades.
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67. Shade matching in Glass ionomer
Vita shade
Biochromatic shade
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69. Shade distribution chart
•Tooth divided into 3 regions
•Each region matched independently
•Individual characterstics marked
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70. Colour measuring devices
They remove the subjectivity out of the colour matching process
Shade vision system
Vita easy shade
•Still in their infancy
lack the ability to
match the shade of the
tiny, fine details
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71. An understanding of the science of colour and colour
perception is important if success is to be attained in the
ever expanding field of esthetic restorative dentistry.
Although limitations in materials and techniques may
make a perfect colour match impossible, a harmonious
restoration can almost always be achieved . Shade
selection should be done in a methodical and and
organised manner. This will enable the practitioner to
make the best choice and communicate it accurately to the
laboratory
Conclusion
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72. Thank you
For more details please visit
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