Abstract
The purpose of this study is to analyse and investigate by the finite element & linearprogramming method dynamical affects on the retainer, abutment tooth, and supporting tissueswhen the retainer with esthetic and functional improvement was loaded by the prosthetic treatmentthat modifies the tooth crown axis by applying the dowel core to the maxillary protrudedanterior tooth and reversed cross bite.
The finding obtained are as follows:
1. The greater the load angle at 30°, 45°, and 60°, and also the nearer the load position tothe margo incisivus, the more increases the stresses at periodentium, on a border of post and toothand in the porcelain jacket crown.
2. Improvement by labially inclining the tooth crown axis of the anterior tooth of reversedcross bite results in less stresses occurring at periodentium, on the border of post and tooth and inthe alveolar bone than improvement of the anterior protruded tooth by lingually inclining thetooth crown axis.
3. The risk of fracture of the porcelain jacket crown of the retainer depends more on theposition of load rather than on the angular difference between the tooth crown axis and radixdentis.
