Test 2 Flashcards
Direct-placement esthetic restorative materials
Composite resin
Glass ionomer cement
Resin modified class ionomer cement
Compomer
Composite resin
Mixture of two or more materials
Tooth coloured restorative materials
Resin components
Resin matrix (thick liquid)
Filler particles(make resin stronger,control handling characteristics like translucency and viscosity, reduce shrinkage like expansion and contraction, but soften that leads to wear)
Fillers are made up of quartz, glass, silica or ceramic
Particle size
Large or small particles
Large particles get plucked from the resin matrix at the surface when the restoration is under function=appear dull or rough
Small particles are not easily plucked and cause voids,packed more closely= appear smooth
Polymerization
Chemical reaction within resin between initaiors and activators
1.chemical cured:chemically activated
2.light cured:light activated
3.dual cured:combination of chemically and light activation
Modes of cure
Chemical cure-self cure
Light cure-blue wavelength,curing light
Dual cure-both visible and chemical reactions
Flowable composite
Low viscosity, light cured resins
Lightly or heavy filled
Nano size fillers have low viscosity
Ex. Preventative resin restorations
Bulk fill composites
Developed to speed up placement process of composite restoration
Challenges(shrinkage restrictions during curing, flowability,polish-ability
Translucency
Filler particles
Available in two consistencies
-flowable
-viscous nano hybrids
Packable composites
Highly viscous micro hybrids
High volume of filler particles(stiff consistency)
Posterior teeth restoration
Core buildup composites
Heavily filled composites
Can be
Light cured
Self cured
Dual cured
Physical properties of composites
Biocompatibility
Strength
Wear
Thermal conductivity
Water scorpion
Selection of composite material on anterior
Non stress
Esthetics
Polish ability
Selection of composite material on posterior
Stress bearing
Strength and wear resistance
Incremental placement
Use in moderately sized or large cavity preparations
Placed in small increments
Permits adequate curing
Glass ionomer cements
Packaging
-hand mixed power and liquid
-encapsulated powder and liquid
-two paste systems
Release Flouride
Self or light cured
Luting cements in ortho,restorative materials, liners or bases to rebuild dentin
Not very resistant cannot be polished
Hybrid ionomer
Improved physical properties(combo of composites and GIC)
Dual cure materials
Stronger
Easier to polish
More wear resistant
Flouride release
Nano-ionomer
Also called nano-GICs
Improved esthetics
Increased wear resistance
Flouride release
Compomers
Composite resins that have been modified with ply acid
Giomers
New hybrid restorative materials
Packaged as single paste syringes or flowable
Indirect placement composite resin
Indirect chair side technique
Dental ceramics
Highly esthetic
Indirect restorative materials
Classified in two broad catergories
-glass based ceramics /silica
-non glass based ceramics /simple or complex oxides
Advantages of ceramic restorations
Biocompatibility
Stain resistance
Wear resistance
Highly esthetic
Disadvantages of ceramic restorations
Brittleness
Wear an opposing enamel or restorations
Difficult to repair them in the mouth
Difficult to polish them in the mouth
Glass silica based ceramics
