Dental Composites Flashcards
Composite is…
Filtek supreme XT Four opacities in 34 shades Good shade matching Mech properties of hybrid composites Outstanding polishability similar to microfills with good retention of surface finish Excellent handling characteristics High wear resistance 8
Curing
LED blue light
480nm
30 seconds polymerisation
SDR
Smart dentine replacement
Elastomeric molecules which provide low shrinkage stress and won’t pull away from walls of cavity as much
Effect on interface is reduced
Restorative vs Flowable
Positives of flowable and how they can be utilised
Less filler in flowable composite and more resin
Increased amount of polymerisation shrinkage
Not good for full restoration
Composite has less resin more filler
Will shrink less
Can be used to fill base of cavity well
Advanced uses of composite
Confirmative restoration Altering morphology Temporary bridges Occlusal rehabilitation Splinting teeth
Resin composite ideal properties
Selection criteria
Perfect colour match
High polishability and durable finish
High wear resistance
Low shrinkage
Shade and opacity Filler composition Physical properties Handling characteristics Cost Greater complexity = greater time and cost
Anterior layered build technique
Process
- Cosmetic trial and imagine
- Wax mock up
- shade and character assessment
- build up from back
Finishing systems
- Fine diamonds
- SofLex discs - coarse to fine
- Smoothing and high gloss enhancement kits
Microfilled
Filler material
Average particle size
Examples
Amorphous silica
0.04 micrometres
Heliomolar
Micro-hybrid
Filler material
Average particle size
Examples
Glass particles and microfillers
0.4-0.8 micrometres
Dentsply
Continuum filled
Filler material
Average particle size
Examples
Zirconia/silica
0.01-3.5 micrometres
Z100
Nano filled
Filler material
Average particle size
Examples
Zirconia/silica nanofillers and clusters
5-20 nm
Filtek supreme XT
