Mucosal Thickness of the Denture Foundation after Occlusal Force

义齿基托可压缩性的检测是义齿制作的重要环节。这些区域，特别是腭环区，不应该受到义齿的过大压力，对于这种特定的区域，通常需要解除。本研究的目的是调查义齿基托的可压缩性，并确定特定区域的厚度减少量。主要结果如下：1.最大咬合力作用下，粘膜厚度平均减少约0.3 mm。2.最大咬合力作用下，下颌粘膜厚度的减少率大于上颌。3.从解除过程中粘膜厚度的减少来看，发现重度腭环需要减厚0.5 mm，中度腭环需要减厚0.25~0.50 mm。4.即使在不存在腭环的病例中，切开乳头和腭正中缝合区也需要减厚约0.25 mm。

Examining of the compressibility of the denture foundation is very important for construct of a denture. The areas, especially the torus palatinus area, should not be pressured excessively by a denture and relief is usually necessary for such specific areas.The purpose of this study was to investigate the compressibility of the denture foundation and to determine the amount of relief in thickness over the specific areas.The main results were follows :1.Decrease in the mucosal thickness under maximum occlusal force was about 0.3mm in averages.2.Decreasing rate in the mucosal thickness under maximum occlusal force was greater in a mandible than in a maxilla.3.Judging from the decrease in the mucosal thickness by relief procedures, it was found that 0.5mm relief in thickness was necessary in a case of a severe torus palatinus and 0.25-0.50mm relief in a moderate one.4.Even in a case without the existance of torus palatinus, about 0.25mm relief in thicknesss was desirable over the incisive papilla and median palatine suture areas.