GREENE VARDIMAN (GV) BLACK

GV Black invented 1st drill

"extension for prevention"

BLACKS CLASSIFICATION

DISADVANTGES OF BLACKS CLASSIFICATION

CAVITY PREPARATION

RESISTANCE FORM:resistance to occ forces. Tooth structure and material withstand masticatory forces.

Enamel margins must be finished - un supporting enamel is prone to #

RETENTION FORM:grooves in cavity walls, use undercuts and occ keys, use of etch and bond materials

TREATMENT OF RESIDUAL CARIES:always remove from EDJ first, then base of cavity

In ANTERIOR teeth stained dentine may be removed for aesthetic reasons. Preserve oblique ridge where poss

CORRECTION OF ENAMEL MARGINS:unsupported enamel is prone to #. Remove weakend tooth if placing amalgam

CAVITY DEBRIDEMENT: Cavity should be thoroughly washed and dried to remove any debris and bacteria

CAVITY PREP FEATURES:box prep, gingival floor, occ floor, pupo axial wall, dovetail occ lock (with isthmus), beveled angle

POINT ANGLE: where 3 or more lines(surfaces) meet