局所機能圧・負担圧に関する基礎的研究 ＩＩＩ‐１． 床粘膜面未調整上顎総義歯の中心こう合位について

Abstract

We studied the effects of complete occluded maxillary and mandibular dentures with regard to maintenance, stability and surrounding supportive tissues and measured the stress-bearing of maxillary denture mucosa and bones at the centric occlusion. The results were compared with the stress-bearing of a complete maxillary denture with a good fit between maxillary and basal mucosa.The results were as follows:1. Distribution of stress-bearingThe stress-bearing of the top of the residual ridge of anterior teeth, part of the basal margin and buccal region was remarkably higher than that of fit complete denture (FCD). The stress-bearing of incisive papilla, top of the molar residual ridge, top of the maxillary tuberosity, part of the buccal region, palate and post dam was lower than that of FCD2. Mobility of stress-bearing1) It was especially quick in the top of the maxillary tuberosity and palate. The onset of stress-bearing of the residual ridge, basal margin and buccal region was slower than that of FCD. It was quick for the palate and post dam.2) It was much quicker than the loading time of the maxillary bone of the top of the tuberosity, palate and post dam.3) The start of stress-bearing was slower than that of loading of the palate and maxillary tuberosity.