臼歯部人工歯の選択について シミュレーションモデルによる検討

Abstract

The posterior artificial teeth form and occlusal scheme are the some of the important factors improving the denture stability and function. The effect of the artificial posterior teeth form and occlusal scheme on the pressure distribution on the complete denture supporting structure during simulated mastication was investigated by using upper and lower edentulous simulators. In this report, a guideline for the selection of posterior artificial teeth for complete denture, based on our previous investigation, was studied.1. The lateral wing inclination of the incisal guide table of semi-adjustable articulator, and occlusal form and scheme of posterior articulator hardly affected the pressure distribution on supporting tissues under complete denture in centric occlusion.2. When lateral mastication was simulated, the lateral wing inclination of the incisal guide table of semi-adjustable articulator, and occlusal form and scheme of posterior articulator affected the pressure distribution on supporting tissues under complete denture in centric occlusion.3. The guidelines in consideration of the denture stability were as follows:1) In the case of the patient who had good upper and poor lower alveolar ridges, full balanced occlusion with Livdent teeth should be set in his/her complete denture.2) In the case of the patient who had poor upper and lower alveolar ridged, lingualized occlusion should be set in his/her complete denture.3) In the case of the patient who had poor upper and good lower alveolar ridges, Bio-Ace teeth should be selected rather than Livdent teeth in his/her complete denture fabrication.