2773. Normal dentition in centric occlusion, opposing contact may be expected at_____________?

A. Buccals slopes of buccal cusps of maxillary posterior teeth
B. Buccal slopes of lingual cusps of maxillary posterior teeth
C. Lingual slopes of lingual cusps of mandibular posterior teeth
D. All slopes of lingual cusps of mandibular posterior teeth
✅ The correct answer is option B. Buccal slopes of lingual cusps of maxillary posterior teeth.

2776. Amalgam means_____________?

A. A metallic powder composed of silver, tin, copper and zinc
B. An alloy of two or more metals one of which is mercury
C. An alloy of two or more metals that have been dissolved in each other in the molten state
D. A metallic substances in powder or tablet from that is mixed with mercury
✅ The correct answer is option B. An alloy of two or more metals one of which is mercury.