CLASS VCavity prep:-¤ Extension determined by Caries extension, follow gingival contour.¤ Occlusal and gingival walls ー arc shaped - Both parallel to each other¤ Occlusal arc will be longer than gingival arc¤ Pulpal floor ー convex shape ( to preserve the center of the tooth which is having close proximity to the pulp)¤ 2 line angles names :- Occlusoーaxial line angle & Gingivoーaxial line angle- retentive grooves [Not Rounded]¤ Best restorative ー Direct filling Gold - due to its high biocompatibility¤ Composite ー microfilled – able to get high polishability¤ After GIC restoration, thin flush is removed by scaler or knife immediately or finishing stone laterQ. The Carat of gold foil used for direct filling restorations is 24.ROOT CARIES○ Actinomyces○ No shape ー caries extension determines the margin of cavity preparation○ Gingival recession will promote senile caries.○ Best material ー GIC○ Old ppl ー RMGIー aesthetic area

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