ADC Practical Exam Practice Questions - ADC Practical Examination (Dentists) Exam

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During the Technical Skills Day, you are preparing a Class II cavity on a typodont molar for amalgam. To create adequate resistance and retention form, what is the recommended pulpal floor depth and the ideal cavosurface margin angle for the occlusal portion?

Pulpal floor ~0.5 mm into enamel with a 45-degree bevelled margin Pulpal floor ~3.5 mm into the pulp chamber with a feather-edge margin Pulpal floor ~1.5-2 mm into dentine with a 90-degree (butt-joint) cavosurface margin Pulpal floor ~1 mm above the enamel-dentine junction with a 120-degree margin

Correct Answer:

Pulpal floor ~1.5-2 mm into dentine with a 90-degree (butt-joint) cavosurface margin

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