アブストラクト（28巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Loads on Abutment Teeth on the Working Side of Bilateral Free-end Dentures
Subtitle　： ORIGINAL ARTICLES
Authors　： Minoru Toyoda*1, Satoru Hojo*1, Kimiyuki Morita*1, Tatsuru Takagaki*1, Naho Hamano*1, Yumi Ishikawa*2
Authors（kana）　：
Organization　： *1Department of Prosthetic Dentistry, Kanagawa Dental College, *2Department of Animal Teaching Hospital, Kitasato University
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 28
Number　： 2
Page　： 113-118
Year/Month　： 2000 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] For the protection of abutments, it is important to study the vectors and loads which they bear on partial dentures during masticatory mandibular movement. However, there are few reports available which deal with this theme in association with the conditions of alveolar ridges and occlusal contact patterns. We set out to investigate the loads and vectors of the forces exerted on the apexes of abutment teeth, using models with poor or good alveolar ridges. A poor alveolar ridge is formed by a flat alveolar bone of epoxy resin and a good alveolar ridge is an 8 mm high alveolar bone of epoxy resin fixed at an inclination of 60 degrees. As for occlusion, three contact patterns were assumed. The displacement of the abutment tooth apex was measured with a resistance strain gauge using a cantilever. Our findings were as follows: 1) The greatest load was applied laterally to the abutment teeth on the working side when the denture was invested with a full balanced occlusion in the case of a poor alveolar ridge. 2) The lateral load on the abutment teeth was the least under the conditions of a good alveolar ridge and group function occlusion. The usefulness of the retainer on the balancing side, where there is no occlusal contact, was reconfirmed as it seemed to be contributory to cross-arch stabilization.
Practice　： Dentistry
Keywords　： Load of abutment teeth, Occlusal contact, Alveolar ridge