Development of in vivo measuring system of the pressure distribution under the denture base of removable partial denture
Development of in vivo measuring system of the pressure distribution under the denture base of removable partial denture
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DOI：
10.1016/j.jpor.2008.08.006
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发表时间：
2009-01-01
影响因子：
3.6
通讯作者：
Sasaki, Keiichi
中科院分区：
文献类型：
--
作者：
Kubo, Kei;Kawata, Tetsuo;Sasaki, Keiichi
目的：目的：研制可摘局部义齿（RPD）基托下压力分布的测量系统，并将其应用于活体，方法：采用100个传感点的触觉传感器片和I-SCAN（TM）测量系统。传感器在应用于体内之前进行了校准。一名患有下颌RPD（Kennedy II类，1类）的受试者参加了这项研究，并将RPD复制为实验义齿。以类似于直接换衬的方式将远端延伸部分的基底表面与传感器相适应。在最大随意紧牙关（MVC）和咀嚼口香糖的过程中，采用三种不同的牙合支托设计（近中支托和远中支托、仅近中支托和无支托）进行测量。结果：校准测量结果显示，每个感知点的输出值和感知点的总输出与施加的载荷呈正相关。在体内记录的压力变化取决于传感点的义齿的基底表面上的位置。在MVC过程中，压力分布随着咬合水平的变化而变化，最高压力出现在剩余牙槽嵴顶部附近。压力分布也随牙合支托数目的不同而变化。结论：研制的RPD基托压力测量系统能够测量RPD基托下的压力分布。压力分布沿着牙合支托的设计而变化。(C)2009年日本口腔修复学会。由Elsevier爱尔兰出版。All rights reserved.
Purpose: To develop a system to measure the pressure distribution under the base of a removable partial denture (RPD) and to apply it in vivo.Methods: A tactile sensor sheet with 100 sensing points and a measuring system (I-SCAN (TM) ,Nitta, Osaka, Japan) were used. The sensor was calibrated before being applied in vivo. A subject with a mandibular RPD (Kennedy class II, division 1) participated in this study, and the RPD was duplicated as the experimental denture. The basal surface at distal extension was accommodated to the sensor in a manner similar to direct relining. Measurements were performed with three patterns of occlusal rest design (mesial and distal rests, mesial rest only, and without a rest) during maximal voluntary clenching (MVC) and gum chewing.Results: The calibration measurements showed that the output value from each sensing point and total output of sensing points were positively correlated with the applied load. The pressures recorded in vivo varied depending on the locations of sensing points on the basal surface of the denture. During MVC the pressure distribution changed with the clenching level, and the highest pressure was registered near the residual ridge crest. The pressure distribution also changed according to the number of occlusal rests. The load center shifted about 2 mm during MVC and about 4 mm during gum chewing.Conclusion: The measuring system developed here enabled us to measure the pressure distribution under the denture base of RPD. The pressure distribution varied along with the design of the occlusal rest. (C) 2009 Japan Prosthodontic Society. Published by Elsevier Ireland. All rights reserved.