Pressures on supporting tissues under complete denture during functions. Concerning the effects of the arrangement of artificial posterior teeth

Abstract

The purpose of this study was to investigate how the arrangement of the artificial posterior teeth of the complete denture influenced pressures of supporting tissues under denture. The eight diaphragm pressure sensors were placed on the lower complete denture base to measure the pressures.The pressures were measured dynamically during mastication.The results were as follows:1. The pressures in tapping movement were much different among subjects, but the pressures of lingual side showed the common tendency to be greater than the pressures of buccal side.2. In the cases of subjects 1 and 2, the difference between the pressures in mastication and those in tapping movement was minimum with the standard arrangement. In the case of subject 3, it was minimum with the lingually shifted arrangement.3. During mastication, total pressures much increased on the chewing side with the buccally shifted arrangement than the standard arrangement, and its difference between on chewing side and non-chewing side got bigger. In the case of the lingually shifted arrangement, its difference got bigger.4. As the above-mentioned showed, the following was found: The arrangement of the artificial posterior teeth of the complete denture influenced the distribution of the pressures of supporting tissues under denture greatly, and especially in the case of the buccally shifted arrangement, the pressures increased.