Kimura M
Department of Maxillofacial Rehabilitation, Faculty of Dentistry, Tokyo Medical and Dental University.
Kokubyo Gakkai Zasshi. 1999 Dec;66(4):382-96. doi: 10.5357/koubyou.66.382.
The purpose of this study was to elucidate optimal relations between functional load distribution of periodontal supports and mucosal supports from denture bearing area in maxillary bilateral free-end-saddle RPD. Therefore, specially designed, palatal plate changeable RPDs were designed without changing occlusal relation and all other elements. The denture bearing area were measured by the thin foil method, standardized by Cubscraniophor. After wearing RPD, clinically physiological observation in occlusal contacts and loads were carried out by Prescale with an exclusive computer analyzing system. Masticatory muscular EMG and occlusal contacts were recorded with Prescale at i.p. clenching. Five maxillary bilateral shortened archcases were used for this prosthodontic research and studied in periodically at pre- and post-RPD treatments. These data were analyzed and compared with those of the control group. The outlines of these results were as follows: 1. The relation with mucosal denture supporting area and musculature activities were shown as y = -0.19x2 + 5.3x + 93.8, the maximal value: 13.48 cm2. 2. The direct proportion was observed in relation with anteroposterial location of masticatory center in dental arch and denture bearing area. 3. The optimal denture bearing area was observed in each shortened arch case.
本研究的目的是阐明上颌双侧游离端鞍基可摘局部义齿（RPD）基托承托区牙周支持组织与黏膜支持组织功能负荷分布之间的最佳关系。因此，设计了特殊的、可更换腭板的RPD，且不改变咬合关系和所有其他因素。采用薄箔法测量基托承托区，并通过Cubscraniophor进行标准化。佩戴RPD后，使用Prescale及专用计算机分析系统对咬合接触和负荷进行临床生理观察。在最大紧咬时，用Prescale记录咀嚼肌肌电图和咬合接触情况。选取5例上颌双侧牙弓缩短病例进行该口腔修复学研究，并在RPD治疗前后定期进行研究。对这些数据进行分析，并与对照组数据进行比较。这些结果大致如下：1. 黏膜义齿支持面积与肌肉活动的关系为y = -0.19x2 + 5.3x + 93.8，最大值为13.48 cm2。2. 观察到牙弓咀嚼中心的前后位置与基托承托区之间呈正比关系。3. 在每个牙弓缩短病例中均观察到了最佳基托承托面积。
