局所機能圧・負担圧に関する基礎的研究 ＩＩ‐３． 上顎総義歯の側方こう合位について

Abstract

We previously studied distribution of stress-bearing at the centric occlusion in basal tissues of complete maxillary denture. Furthermore, we studied it at each occlusion on the right side, the right rubber molar, the right resin molar and bilateral balance.The results were as follows:1. Right side occlusion (right)Stress-bearing of the residual ridge, basal margin, buccal region, palate and post dam in the centric occlusion increased especially from the basal margin to the palate including the incisive papilla, but decreased in range from the balance basal margin to the palate.2. Right rubber molar occlusion (rubber)Comparing stress-bearing of the residual ridge, basal margin, buccal region, palate and post dam in the centric occlusion with that on the right, there was significant elevation from the masticatory basal margin to the palate, but reduction in the incisive papilla and median palate.Stress-bearing from the non-masticatory basal margin to the palate significantly decreased except for the maxillary tubercle, buccal region and basal margin.3. Right resin molar occlusion (resin)Comparing stress-bearing in the centric occlusion with that on the right and on rubber, there was an elevation ranging from the masticatory basal margin to the palate, but reduction in the median palate. Stress-bearing of the incisive papilla was markedly lower than that on the centric occlusion and on the right, but higher than rubber.The stress-bearing from the non-masticatory basal margin to the palate decreased. It was at a negative level in maxillary mucosa and was within normal limits in maxillary bone.