1. CCaavviittyy pprreeppaarraattiioonn
aaccccoorrddiinngg GG..VV..BBllaacckk
IIII.. BBllaacckk ccllaassss
Upload By : Ahmed Ali Abbas
Babylon University College of Dentistry
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GROUP: C
2. G.V. Black’s Approach to
Cavity Preparation
1. Outline form
2. Resistance form
3. Retention form
4. Convenience form
5. Removal of remaining caries
6. Finish enamel walls
7. Clean cavity preparation
3. G.V. Black’s Approach to
Cavity Preparation
1. OOuuttlliinnee ffoorrmm
Based primarily on the location and extent of the caries.
Final outline form is not established until the carious
dentin and, usually, its overlying enamel has been
removed
4. G.V. Black’s Approach to
Cavity Preparation
22.. RReessiissttaannccee ffoorrmm
Resistance to both fracture of the tooth and filling
material must be built in so both will be resistant to
fracture during function
5. G.V. Black’s Approach to
Cavity Preparation
33.. RReetteennttiioonn ffoorrmm
The tooth preparation must be shaped in such a
way to retain the filling material, without
weakening the remaining tooth structure
6. G.V. Black’s Approach to
Cavity Preparation
44.. CCoonnvveenniieennccee ffoorrmm
Allows adequate observation, accessibility, and ease of
operation during the preparation and restoration of the
tooth.
Only the minimal amount of reduction that will provide
the necessary convenience should be done
7. G.V. Black’s Approach to
Cavity Preparation
Re 5. Remmoovvaall ooff tthhee rreemmaaiinniinngg ccaarriieess
Deeper caries not removed by the initial cavity
preparation is now removed. Care must be
exercised as the pulp may be in close proximity.
8. G.V. Black’s Approach to
Cavity Preparation
6. Finish ooff eennaammeell wwaallllss aanndd mmaarrggiinnss
Remove unsupported enamel, make the margins
smooth and continuous to facilitate finishing of
the restoration.
9. G.V. Black’s Approach to
Cavity Preparation
7. CClleeaann tthhee ccaavviittyy pprreeppaarraattiioonn
Rinse away all debris and dry the cavity
preparation.
12. Features of the Class II preparation:
open gingival, lingual, buccal contacts;
dove tail; reverse “S”; convergent walls;
even depth;
smooth surfaces;
no sharp angles.