STRESSES INDUCED BY DIFFERENT LOADINGS AROUND WEAK ABUTMENTS


AYDIN A., TEKKAYA A.

JOURNAL OF PROSTHETIC DENTISTRY, vol.68, no.6, pp.879-884, 1992 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 68 Issue: 6
  • Publication Date: 1992
  • Doi Number: 10.1016/0022-3913(92)90543-j
  • Journal Name: JOURNAL OF PROSTHETIC DENTISTRY
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.879-884

Abstract

Stresses and deflections of abutments induced by various loadings were analyzed with a two-dimensional finite element model. The biomechanic system consisted of the mandibular posterior three-unit fixed partial denture (FPD). Four different loading types were analyzed: (1) a distributed force of 600 N; (2) concentrated nonaxial and (3) axial 300 N forces at the marginal ridge of the molar; and (4) a concentrated vertical 300 N force at the center of the pontic. All computations were conducted for three different alveolar bone levels. The premolar exerted a greater pressure during occlusal loadings (except axially) on the alveolar bone than the molar. According to the stresses induced in the alveolar bone, the most critical loading was the distributed force. With diminishing periodontal support, stresses elevated in the biomechanic system and critical increases were noted for the concentrated nonaxial load on the molar.