Indirect Retainers

A part of a removable partial denture that prevents rotational displacement of the denture about the rests of the principal abutment teeth. Indirect retainers usually take the form of rests, on the opposite side of a fulcrum line.

Lecture 13 (Mandibular first molar)

The mandibular first molar is the largest tooth in the mandibular arch. It is usually the first permanent tooth to erupt at age of 6 year. It has five well developed cusps: two buccal, two lingual, and one distal. It has two well-developed roots, one mesial and one distal, which are very broad buccolingually. These roots are widely separated at the apices. The distal root is smaller and usually more rounded than the mesial root........