Class 1 composite restoration- caries removal Flashcards
when composites were first a thing, how were they cured?
chemically and were used for class 3,4,5
whats has changed with modern composites vs older composites?
Filler size has reduced, and filler amounts have increased up to 70%
whats a nano-hybrid composite?
the smaller filler particles ( nano particles) are intermixed with larger glass and silica particles giving the material toughness.
what composite system do we use at LECOM?
BEAUTIFIL Nanohybrid
do The prep walls have to be convergent?
no they can be parallel to divergent
the prep pulpal depth should be __ past the DEJ?
.5 mm
Advantages of Composite?
Esthetics, conserve more tooth structure, easier preparation, insulation
Disadvantages of composite
Shrinkage, Lower fracture toughness, possible greater localized occlusal wear
on average the composite shrinks how much?
2.6-7.1 %
Do you want centric stops to be on composite or amalgam?
no, They need to be on natural teeth.
how wide should the isthmus be?
1.5mm, also dont encroach past 1/3 of the cusp tip of the cusp
Retention is achieved by micromechanical means which means…..
- etching of enamel and Dentin
- proper bonding technique
- placing bevels
Does the beutibond bond to the tooth?
no , the adhesive
What bur is best to use for entry?
330 or 245
how far pulpal should you go down?
~1.5 mm initially, then you can go 2mm. as you continue to drill
