Elastomers (polysiloxanes) are organic polymer materials that have the ability to stretch, deform, and ultimately bear tension. There are four main types of elastomeric impression materials: 1) poly sulfide, 2) silicone condensation polymerization, 3) addition polymerization silicone, and 4) polyether. Condensation silicones are composed of polydimethylsiloxane, ethyl orthosilicate, silica filler, and a tin octoate catalyst. They polymerize through a condensation reaction between the siloxane and silicate. Condensation silicones are widely used for dental impressions and bite registrations due to their elastic recovery, fluency, and stability over
all details about the chemistry of polymerization
Addition polymerization
Chemical Stages of polymerization
induction
propagation
chain transfer
termination
Inhibition of polymerization
Ring-opening polymerization,
Step growth/Condensation polymerization
Copolymerization
Acrylic resins
Methylmethacrylate
Polymethylmethacrylate{PMMA}
Multifunctional Methacrylate and Acrylate resins
all details about the chemistry of polymerization
Addition polymerization
Chemical Stages of polymerization
induction
propagation
chain transfer
termination
Inhibition of polymerization
Ring-opening polymerization,
Step growth/Condensation polymerization
Copolymerization
Acrylic resins
Methylmethacrylate
Polymethylmethacrylate{PMMA}
Multifunctional Methacrylate and Acrylate resins
Composite Resin Luting cements (2nd edition) presentation powerpoint
A type of dental cement
Used for cementation of indirect restorations & brackets
A summary of five textbooks
Die materials and technique of fabrication/cosmetic dentistry course by India...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.
A dental impression is a negative imprint of hard (teeth) and soft tissues in the mouth from which a positive reproduction (cast or model) can be formed. It is made by placing an appropriate material in a stock or custom dental impression tray which is designed to roughly fit over the dental arches. Impression material is of solid or semi-solid nature when first mixed and placed in the mouth. It then sets to become an elastic solid (usually takes a few minutes depending upon the material), leaving an imprint of person's dentition and surrounding structures of the oral cavity
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.
Duplicating and refractory materials used in removable partial/endodontic co...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
A comprehensive lecture by Dr Rashid Hassan covering all the aspects of different types of model and die materials. Easy ti understand ans recall.
For video lectures on different topics of Dental Materials visit and follow Dr Rashid Lectures on Dental Materials (dmbydrrashid) on Facebook.
A dental impression is a negative imprint of hard (teeth) and soft tissues in the mouth from which a positive reproduction (cast or model) can be formed. It is made by placing an appropriate material in a stock or custom dental impression tray which is designed to roughly fit over the dental arches.
Hydrocolloids /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
Composite Resin Luting cements (2nd edition) presentation powerpoint
A type of dental cement
Used for cementation of indirect restorations & brackets
A summary of five textbooks
Die materials and technique of fabrication/cosmetic dentistry course by India...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.
A dental impression is a negative imprint of hard (teeth) and soft tissues in the mouth from which a positive reproduction (cast or model) can be formed. It is made by placing an appropriate material in a stock or custom dental impression tray which is designed to roughly fit over the dental arches. Impression material is of solid or semi-solid nature when first mixed and placed in the mouth. It then sets to become an elastic solid (usually takes a few minutes depending upon the material), leaving an imprint of person's dentition and surrounding structures of the oral cavity
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.
Duplicating and refractory materials used in removable partial/endodontic co...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
A comprehensive lecture by Dr Rashid Hassan covering all the aspects of different types of model and die materials. Easy ti understand ans recall.
For video lectures on different topics of Dental Materials visit and follow Dr Rashid Lectures on Dental Materials (dmbydrrashid) on Facebook.
A dental impression is a negative imprint of hard (teeth) and soft tissues in the mouth from which a positive reproduction (cast or model) can be formed. It is made by placing an appropriate material in a stock or custom dental impression tray which is designed to roughly fit over the dental arches.
Hydrocolloids /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.
agar agar and alginate impression materialsRenu710209
agar and alginate are the most commnly used impression material in dentistry for recording impression of the dental arches and for duplication of teeth and associated structures.
agar agar and alginate impression materialsRenu710209
agar and alginate are the most commnly used impression material in dentistry for recording impression of the dental arches and for duplication of teeth and associated structures.
Impression materials/ rotary endodontic courses 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.
Production of Cellophane Film. Business Ideas for Entrepreneurs in Cellophane Wrapping Paper Manufacturing.
Cellophane is a thin, transparent sheet made from regenerated cellulose. Its low permeability to air, oils, greases, bacteria, and water makes it helpful for food packaging. Cellophane is very permeable to water vapours, but may be coated with nitrate lacquer to stop this. As well as food packaging, cellophane is used in clear pressure-sensitive tape, conduit and lots of other similar applications. This cellophane may be a high quality, glossy, transparent film that's ideal for art and craft comes and wrapper. The Colored cellophane Rolls live 500mm x 2.5metres and therefore the Clear cellophane Roll measures 500mm x 5metres.
For More Details, Click Here:- https://bit.ly/2ZrJPRK
Contact us
Niir Project Consultancy Services
An ISO 9001:2015 Company
106-E, Kamla Nagar, Opp. Spark Mall,
New Delhi-110007, India.
Email: npcs.ei@gmail.com , info@entrepreneurindia.co
Tel: +91-11-23843955, 23845654, 23845886
Mobile: +91-9097075054, 8800733955
Website: www.entrepreneurindia.co , www.niir.org
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
Final materials in maxillo facial prosthetics/ orthodontics coursesIndian 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.
Materials used for maxillo facial construction/ dental crown & bridge 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
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.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
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.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
A Survey of Techniques for Maximizing LLM Performance.pptx
Elastomers for dental uses
1.
2. Elastomers
(polysiloxanes) :
Used to identify materials with a particular
structure. Are organic materials consisting
of polymer molecules with the ability to
"stretch", "develop," compressed
"ultimately bear to tensions mouth.
3. Chemically there are four types of
elastomeric impression materials used as:
1.Polisulfure
2. Silicone condensation polymerization
3. Addition polymerization silicone
4.Polyether
5. According to the reaction to which they are
subject to change to a plastic state
Those who change their status in a physical
reaction, it is to say, which do not change
their properties, only its consistency when
subjected to heat.
. Wax printing
. Model compounds or Godivas
.reversible hydrocolloid
7. Classification according to their
behavior during setting, hardening or curing.
elastic:
. Mercaptans.
. Elastomers silicones.
. Polyethers.
rigid:
Model compounds or góbidas.
Waxes.
Casts.
8. characteristics to be met by printing
materials to be considered optimal
for management
Easy to handle.
. Compatibility with oral tissues.
. There are irritating.
. Not allergic.
. Taste and look nice mix.
low cost.
. that when subjected to disinfecting
solutions preventing alterations
. Hydrophilic Where possible, that does
not affect the presence of moisture
9. Use of elastomers in odontology :
1 PLAY STRUCTURES WITH HIGH
FIDELITY MOUTH.
Fig#5
10. 2. OCCLUSAL RECORDS MAKE OR BITE,
ACCURATE .
http://expodenta
l.wordpress.com
Fig#6
3 OTHER USES : MISMATCH INDICATOR OF
RESTAURATIONS
Fig#7
http://www.slideshare.net/yuritek/elasto
m2005-presentation
11. - PRINTING MATERIAL
FOR DUPLICATE MODELS
http://www.slideshare.net/yu
ritek/elastom2005-
presentation
Fig#8
12. Silicones:
Elastic materials
are based impressions polydimet
hyl siloxanes orpolyvinyl siloxan
http://www.dentald es. They owe their name to
eml.com/catalogo/c the presence of silica and
ubetadealuminio.ht oxygen in its composition
m
FIG#9
13. Uses: prints are used for crowns and fixed
bridges For bite registration and laboratory
procedures for the process of partial and full
dentures.
Fig#17
Fig#18
14. Condensation silicone
composition
polydimethylsiloxane
Ethyl ortho silicate
Silica filler
CATALYST : Tin octoate
Tin octoate
Silicone Rubber
ethyl alcohol.
The chemical reaction of a condensation silicone is as follows
silicate ortoalquílico
polydimethylsiloxane+ silicate ortoalquilico ----
polydimethyl siloxane + Alcohol
15. PROPERTIES:
. The working time of the silicones is 2-
4 minutes less than the mercaptans
Polymerization time: 6-
3 minutes is comparatively less than the
mercaptans, the polymerization time can be
changed with
temperature temp. High polymerization acce
lerates
Dimensional Stability: Like other print
materials, condensationsilicones contract.
. Can be reduced using well
adapted trays with a thickness of 3 to 4mm.
16. . Elastic recovery: the recovery is
approximately 100% higher than virtually all
other elastic materials.
Fluency: compared with the mercaptans,
these materials are morerigid and therefore
have better flow.
Flexibility: inflexible compared to the
mercaptans and more flexible than the
polyesters
Toxicity of silicones are not toxic, however it
is recommended not to touch his hands and
not take material improperly
mixedimpressions.
17. easy handling .Sensitive to high
.It is stable over temperatures
short periods of time .Evaporation of alcohol
.Have different elastic .Short working
properties time for multiple prints
.Can be prepared .Greater contraction of
with different polysulfides
viscosity resists .Short life
displacement of the
gingival tissues
.It has pleasant taste
and odor