If a tooth with one root lost one-third of its attachment length, its loss of attachment surface would be greater than one-third because the root is larger in the cervical one-third of the tooth.

Question

Quizplus · Accepted Answer

On single rooted teeth, the facial and lingual and proximal surfaces all converge toward the apex and the root surfaces become progressively smaller toward the apex. Therefore, there would be much more surface in the area with least taper toward the apex and that would be the cervical third.

If a Tooth with One Root Lost One-Third of Its