MOHAP Dentist Exam Practice Questions - MOHAP Dentist Evaluation Exam (CBT Via Prometric) Exam

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A patient presents with a Class II amalgam restoration that repeatedly fails at the gingival margin of a proximal box. Which design feature most directly improves marginal integrity and reduces recurrent caries in this region?

Placing a gingival floor with a butt-joint cavosurface margin at 90 degrees to amalgam Beveling the gingival cavosurface margin to 45 degrees Extending the axial wall pulpally to increase bulk Leaving the gingival margin in contact with the adjacent tooth

Correct Answer:

Placing a gingival floor with a butt-joint cavosurface margin at 90 degrees to amalgam

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