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| CAVITY PREPARATION |
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| Class 1 Amalgam |
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| • | External outline
form: |
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| - Dovetail |
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| - Inclusion of pits, fissures,
grooves, caries |
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| - Extension of occlusal portion
varies |
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| depending on primary molar
involved |
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| - Slight occlusal convergence of
walls |
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| - Sharp cavosurface margins |
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| - Adequate tooth structure at
marginal ridges |
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| - Width of prep 1/3 of occlusal
table |
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| - Rounded line angles |
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