Mechanical and physical properties of restorative materials

is dentin or enamel resilient

dentin --> enamel is brittle

what is wear resistant

enamel

enamel mimics

porcelain

dentin. mimics

composite

DEJ mimics

dentin bonding

what restorations are completed chair side in single appointment

direct and semi direct

what are luted restorations

semi direct and indirect

probability of failure of direct restorations is larger for wat

molars, class II, large restorations due to more loading forces

what are semi direct restorations

done inside mouth in single apt but are fabricated extra-orally (inlay, onlay)

difference between onlay and inlay

onlays cover a cusp, inlays don't

when to do semi direct resto

for moderate to large cavity preps including total ocslusal coverage and recommended for up to 2 restos in single apt

what is an indirect resto

formed extra-orally and cemented in a separate apt

indications for indirect resto

recommended for serial restorations when optimal esthetics and occlusion issues are primary concern

what volume of material do you lose when doing inlay MOD

27.2%

what volume of material do you lose when doing onlay MOD

39%

what volume do you lose when doing complete crown

72.3%

cavity prep design

-thin isolated remaining cusps should be <2mm at base/margin located at cusp tip

-min thickness of restorative material for cusp coverage should be at least 2mm overlap