Stress Distribution in Tooth Supported Removable Bridge with Long Saddle. Part 2. In vivo Measurements of Removable Bridge with or without Saddle.

Purpose. In prosthdontic treatment, application of fixed bridge to the expanded intermediate tooth loss often causes overloading of the abutment teeth.Removable bridge with saddle was considered to reduce this danger of over loading.However, little is known about the degree of the reduction by the tissue support of the saddle.The purpose of this study was to evaluate the reduction of occlusal force concentration to the abutments by applying the tooth-bound saddle.Methods. The subject was the same as in the first report.Measurement was carried out on the canine and second molar.Each retainer was constructed with a telescopic crown.Two types of removable bridge were assessed with or without tooth-bound saddles.Test occlusal force of 60 N was applied to the center of bridges.Occlusal force distribution to the abutments and to the bound saddle was measured simultaneously.Conclusion. Support by the bound saddle on an alveolar crest was observed by giving saddle, and the decrease of occlusal force distribution to the abutment teeth was observed.