This presentation tells everything about composite resin from history to composition to usage protocols. A must read for all dental students before practicals and exams.
This presentation tells everything about composite resin from history to composition to usage protocols. A must read for all dental students before practicals and exams.
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
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
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.
Tooth Colored Restorative Materials describes in brief regarding the various materials used as cements and crown for loss of tooth structure either by caries or other factors like trauma, GERD, Abrasion etc
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.
Dental composite /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.
Types of resin composites by students at ahram canadian universityMenna-Allah Ashraf
This presentation is a some sort of reference for second and third year dentistry students ... It has information about recent and different types of resin composites as restorative materials ..this is a student work by students in egyptian private university ( Ahram canadian university )
Behavioral Management Technique For Patient With Special Needs DrGhadooRa
done by : ( ABCD'S &G )
alaa ba-jafar
abrar alshahranii
sahab filfilan
nada alharbi
shahd rajab
Ghadeer suwaimil
I hope that you enjoy and you benefit❤
what are thermoplastic adhesives, types, properties, uses, its explanation with examples, use in the construction industry, applications, includes a market survey.
2 Plastics - thermoplastics, thermosets and elastomers - a.docxeugeniadean34240
2
Plastics - thermoplastics, thermosets and elastomers - are
filled or Compounded with a range of additives to improve
their properties, lower their cost, or both.
Additives in Plastics
COMPOUNDING:
Mixing polymer with other ingredients.
3
Additives in Plastics
Thermoplastics:
to increase modulus of elasticity, strength, hardness and
toughness.
to reduce costs by diluting with bulky, low cost fillers.
to minimize oxidation during thermal processing.
to add color.
to increase flame resistance.
to add flexibility (thereby usually reducing strength and
hardness).
to increase or decrease electrical conductivity.
to provide biodegradability.
to modify surface properties such as antistatic coatings,
antiblocking agents (to prevent film from sticking
together), or solid lubricants for lower friction.
to add nucleating agents for crystallization or for bubbles
in foam production.
Reasons for Compounding
4
Elastomers and Thermosets:
to initiate and accelerate the cure process
safely.
to provide adhesion to brass-plated steel wires
(tires, hoses, and belts), usually by adding sulfur
and zinc oxide.
to add weathering and ozone resistance.
Additives in Plastics
Reasons for Compounding
5
Reinforcing filers: (A polymer containing these fillers
is called a composite, see below).
particulate: carbon black, silica, mica flakes
fibrous: glass fibers, carbon and graphite fibers, metal
fibers, asbestos, whiskers, polymeric fibers etc. mats
(paper, wood) cloth
Inert fillers
(They do not chemically bind with the polymer)
Clay, CaCO3 (to reduce cost)
Additives in Plastics
CLASSES OF ADDITIVES AND THEIR FUNCTIONS
6
Additives in Plastics
Colorants or Color Concentrates
There are two types:
Pigments and Dyes
These are usually added in small quantities to natural-color
base resins at the point of molding or extrusion.
7
Two types:
Organic:
insoluble - opaque effects (e.g. copper phthalocyamine)
Inorganic:
metal oxides or salts - excellent light and heat stability.
Iron oxide: yellow, red, tan
Cadmiun: bright yellow, red.
Carbon black: black.
Additives in Plastics
Pigments
These are finely dispersed solids, 0.01 to 1 mm. The common procedure is
to purchase a color concentrate from a specialist manufacturer. The
concentrate is heavily pigmented extruded compounded whose bas is the
same as the resin or compatible resin; it is supplied as pellets or granules.
8
Dyes:
These are liquid colorants. They are used to impart color
to transparent plastics such as styrenics or acrylics.
They are mostly aromatic organic chemicals - soluble in
solvents. Supplied in liquid form.
Three classes of dyes:
Anthraquinone type: used in automotive tail light.
Nigrosine type : alternative to carbon black.
Oil or water soluble azo types
Additives in Plastics
9
Antistatic Agents:
Because polymers are poor conduct.
done by : ( ABCD'S &G )
alaa ba-jafar
abrar alshahranii
sahab filfilan
nada alharbi
shahd rajab
Ghadeer suwaimil
I hope that you enjoy and you benefit❤
done by : ( ABCD'S &G )
alaa ba-jafar
abrar alshahranii
sahab filfilan
nada alharbi
shahd rajab
Ghadeer suwaimil
I hope that you enjoy and you benefit❤
done by : ( ABCD'S &G )
alaa ba-jafar
abrar alshahranii
sahab filfilan
nada alharbi
shahd rajab
Ghadeer suwaimil
I hope that you enjoy and you benefit❤
DENTAL BIOAEROSOL AS AN OCCUPATIONAL HAZARD IN A DENTIST’S WORKPLACE
NOTE : all this from my reading in some scientific website and articles
I hope that you enjoy and you benefit❤
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
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?
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
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.
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
5. Major
components
Organic resin
matrix
Polymer
filler
materials
- Increase the
strength and
mechanical properties
.
Coupling
agent
to improve adherence
of resin to filler
surfaces.
Activation
systems
including heat,
chemical and
photochemical initiate
polymerization.
Plasticizers
solvents that contain
catalysts for mixture
into resin
6. Physical characteristics improve by combining
more than one type of monomer and are referred
to as a copolymer
Thermal conductivity: composite restoration has a
lower thermal conductivity than do metallic restorations
such as gold alloy or amalgam--silver-colored restorations.
Water sorption : less than the unfilled resin.
Water solubility : has lower solubility than unfilled
resin.
7.
8. Tensile : Composites Require Strong Tooth Structure
To Support The Filling Because The Tensile And Shear
Strength Is Low
Durability:
Composite Restorations Are Not As Durable As Other Materials.
Composite Fillings Previously Were Not As Durable As Amalgams.
Compressive Stength : high
Modulus Of Elasticity : high
9.
10.
11.
12.
13.
14.
15. is the relation between the number of
surfaces bonded divided by the number
of surfaces unbonded.
As the configuration factor goes up, the
effects of polymerization stress and
strain become more significant in
maintaining marginal seal.
16.
17. System Has Been Developed To
Minimize Polymerization Shrinkage And
Polymerization Stress, While Providing A
High performance Bond To The Tooth.
19. -As Silorane-based Composite Polymerizes, “Ring
Opening” Monomers Connect By Opening,flattening
And Extending Towards Each Other.
The Result Is Significantly Less Volumetric Shrinkage
Compared To Methacrylate-based Composites.
-As Methacrylate-based Composites Cure, The
Molecules Of These “Linear Monomers” Connect By
Actually Shifting Closer Together In A Linear
Response. The Result Is A Loss Of Volume.
1 ) Silorane
22. The Name Silorane Derives From Its Chemical
Building Blocks Siloxanes And Oxiranes.
The Combination Of The Two Chemical Building
Blocks Of Siloxanes And Oxiranes Provides The
Biocompatible,hydrophobic And Low-shrinking
Silorane Base Of Filtek LS Low Shrink Posterior
Restorative.