Bench test preparation questions

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moustafa

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Can someone list the differences in the preparation between both class II amalgam and class II composite?

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Can someone list the differences in the preparation between both class II amalgam and class II composite?

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Here are some of the differences-
Amalgam Composite
-pulpal depth- 1.5 mm Only remove fault
-Axial depth- 0.2-0.5 mm remove fault
-cavosurface margin-90 degree >90 degree
retention form- convergence occlusally none
 
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