Retentive grooves of a proximal box in a class II cavity prepared for amalgam should be:

Question

Accepted Answer

Elongated and rounded in dentine at the buccoaxial and linguoaxial Line angles extending from the gingival wall to the axiopulpal line angle

Answer

Sharp and elongated at the dentino enamel junction of the buccal and lingual walls

Answer

Sharp and well defined extending from the gingival to the occlusal cavosurface angle along the buccal and lingual line angles

Answer

Short and rounded at the dentino enamel junction of the buccal and lingual walls

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