The proximal contact of posterior teeth creates wear patterns that eventually cause? a. gingival recession. b. increased length of clinical crowns. c. decreased length of anatomic crowns. d. reduced interproximal embrasure spaces.

The answer is C.

Explanation:

The term posterior teeth defines the teeth in the back of our mouths with their flat surfaces to crush the food. There are two kinds and they are called molars and premolars. The proximal contact of posterior teeth refers to these teeth being in contact with each other's surface areas constantly which result in erosion over time. The answer given in option C, decreased lenght of anatomic crowns is true because anatomic crown is the part of the teeth that is visible and covered with enamel so the constant contact affects this area and causes it to wear in time.

I hope this answer helps.

1 and 6 for apex