人工歯のこう合面形態の相違が食品破砕効果に及ぼす影響 リンガライズド・オクルージョン用ブレードティースの効果

Abstract

Various types of artificial teeth have been developed for the denture. Anatomic teeth are generally used for masticatory ability, while nonanatomic teeth are used for denture stability, however which type is more suitable has not been decided yet. The purpose of this study was to examine the influence of the difference in occlusal configuration of lingualized occlusion. The experimental dentures of lingualized occlusion were made using anatomic teeth (30°) and nonanatomic teeth (blade teeth for lingualized occlusion). Four types of test foods were selected, and the food crushing effect and the influence of load variation to the denture were examinated.The results were as follows:1. Maximum vertical forceFor all test foods, the average of maximum vertical force of the blade teeth was weaker than the 30° teeth, and a statistically significant difference was observed.2. Maximum horizontal forceA difference was observed in the average of maximum horizontal force in various directions.3. The crushing effect of the blade teeth was the most effective for hard food crushing.4. It became clear from the above results, that the blade teeth had an effect on masticatory efficiency, the denture stability and the reduction of bearing stress of surviving tissue.