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Rubber Hardness Discrimination and Associated Bite Force in Osseointegrated Implant Patients

骨整合种植体患者的橡胶硬度辨别和相关咬合力

基本信息

批准号：
10671815
负责人：
INAI Tetsuji
金额：
$ 1.47万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10671815/
关键词：
Osseointegrated Implant Cleft Lip and or Palate Bite Force Rubber Hardness Discrimination Alveolar Cleft

项目摘要

To clarify the functional role of the periodontal membrane, interdental discrimination ability of rubber hardness was examined in 20 normal dentate subjects and 6 implant patients with cleft palate. One titanium implant [Branemark system] was inserted into the upper incisor site after orthodontic treatment. Five different test pieces of rubber hardness were prepared for the experiment. Each piece was placed at the site of upper implant incisor and natural incisor. The subjects were asked to assess whether a test piece was felt harder, softer or similar in hardness compared with a reference test piece. Bite forces were electrically measured with strain gauge during the discrimination. The error rate of the normal dentate subjects was 25.2【minus-plus】7.5% (mean 【minus-plus】 SD) on the left site, and 28.2【minus-plus】5.4% on the right. In the implant patients, the error rats were 23.3【minus-plus】5.0% in the natural site, and 28.0【minus-plus】8.7% in the implant site. Any differences in the error rates were not observed between subjects, and between sites examined. In the implant patients, the median of error distribution for rubber hardness in the natural site was not different from implant site (natural : 51.1【minus-plus】3.2 deg., implant : 50.2【minus-plus】2.5 deg.). However, bite forces of the patients were significantly higher than that of normal dentate subjects (p<0.001), and bite forces in the natural site were not different from those in the implant site in individual patients. These results suggested that the periodontal membrane of these implant patients may be affected by orthodontic treatment, and that, controlling bite forces, periodontal membrane in the lower teeth may play compensation in rubber hardness discrimination.

为了阐明牙周膜的功能作用，对20名正常齿列受试者和6名腭裂种植患者进行了橡胶硬度的牙间辨别能力检查。正畸治疗后，将一颗钛种植体 [Branemark 系统] 植入上切牙部位。实验准备了五种不同橡胶硬度的试件。每块都放置在上种植体切牙和天然切牙的位置。要求受试者评估与参考试件相比，试件是否感觉更硬、更软或硬度相似。在辨别过程中用应变仪以电方式测量咬合力。正常齿状受试者的错误率为左侧25.2【负加】7.5%（平均【负加】SD），右侧为28.2【负加】5.4%。在植入患者中，自然位点的误差大鼠为23.3【负加】5.0%，植入位点的误差大鼠为28.0【负加】8.7%。在受试者之间以及检查地点之间没有观察到错误率的任何差异。在种植体患者中，自然部位的橡胶硬度误差分布中位数与种植体部位没有差异（自然部位：51.1【负+】3.2°，种植体：50.2【负+】2.5°）。然而，患者的咬合力明显高于正常齿状受试者（p<0.001），并且个体患者自然位点的咬合力与种植体位点的咬合力没有差异。这些结果表明，这些种植患者的牙周膜可能会受到正畸治疗的影响，并且通过控制咬合力，下牙的牙周膜可能在橡胶硬度辨别中发挥补偿作用。