Clinical analysis of alveolar bone resorption in relation to pressure distribution of denture foundation in elderly edentulous patients

义齿基板的粘弹性在每个个体或部位都是不同的。应检查粘膜的特征和适当的压印程序。然而，关于义齿基托压缩性与印模压力之间关系的研究报道较少。本研究的目的是探讨义齿基托与印模压力的客观评价。本文采用20 MHz b型超声诊断设备对20例上无牙患者的义齿基托局部压缩性进行了测量。定义可压缩指数，定量分析义齿基托在印模压力下的可压缩性。主要结果如下：1。在100gw /cm^2加压条件下，义齿基托的可压缩量平均为0.32 ~ 0.61mm.2。在100gw /cm^2压力下，义齿基托的压缩率平均为13.5 ~ 20.7%。可压缩性指数被证实可以准确地代表义齿基托相对于印模压力的可压缩性。结果表明，可压缩指数可用于义齿基托的临床简单评价。

The viscoelastic character of the denture foundation is different in each individual or site. The character of the mucosa and the appropriate impression procedure should be examined. However, few investigations concerning the relation between the compressibility of the denture foundation and the impression pressure have been reported.The purpose of this study was to discuss the objective evaluation of the denture foundation in relation to the impression pressure.In this report, the local compressibility of the denture foundation of 20 upper edentulous patients was measured with the 20 MHz B-Mode ultrasonic diagnostic equipment. The Compressible Index was defined to analyze the compressibility of the denture foundation quantitatively as against the impression pressure.The main results were as follows :1. The compressible amount of the denture foundation against 100 gw/cm^2 pressurization was an average of 0.32-0.61mm.2. The compressible rate of the denture foundation against 100 gw/cm^2 pressurization was an average of 13.5-20.7%.3. The Compressible Index was confirmed to represent the compressibility of the denture foundation accurately as against the impression pressure.4. It was suggested that the Compressible Index was useful for the clinical simple evaluation of the denture foundation.