Advantages of mesial rests for removable partial dentures

Abstract

Occlusal rests that are located on the mesial part of the occlusal surface of an abutment tooth have certain advantages over occlusal rests that are located on the distal part of the occlusal surface of an abutment tooth. These advantages include an axis of rotation that is more anterior in the dental arch, less trauma to the soft tissue immediately distal to abutment teeth, a reduction in the need for indirect retention, a more favorable fulcrum point on the abutment tooth, and increased resistance to distal displacement of the removable partial dentures. These advantages were illustrated and their rationale described. Occlusal rests that are located on the mesial part of the occlusal surface of an abutment tooth have certain advantages over occlusal rests that are located on the distal part of the occlusal surface of an abutment tooth. These advantages include an axis of rotation that is more anterior in the dental arch, less trauma to the soft tissue immediately distal to abutment teeth, a reduction in the need for indirect retention, a more favorable fulcrum point on the abutment tooth, and increased resistance to distal displacement of the removable partial dentures. These advantages were illustrated and their rationale described.