Mericske-Stern R, Zarb G A
Department of Removable Prosthodontics, University of Bern, Switzerland.
Clin Oral Implants Res. 1996 Jun;7(2):153-61. doi: 10.1034/j.1600-0501.1996.070209.x.
Maximal occlusal force and oral tactile sensibility were recorded in 21 edentulous patients wearing maxillary complete dentures and mandibular fixed prostheses supported by Brånemark implants. Bite force was measured with a miniature force transducer between antagonistic molars and premolars, and the passive tactile sensibility of the fixtures was recorded in the horizontal and vertical directions with spring balances. The active tactile sensibility was tested using steel foils (100 to 10 microns). The range of maximal occlusal force recorded was from 35 to 330N with highest values observed on the second premolars (mean 143N). Significantly lower forces were found on molars and first premolars (p < 0.01). The detection threshold of minimal pressure was about 330 g in the horizontal, and 388 g in the vertical direction. This difference was not statistically significant. The average number of incorrect assessments when testing steel foils was 16.6 errors, out of 100 recordings. Similar results when using these 3 test modalities had been found on overdentures supported by two mandibular implants and occluding with maxillary complete dentures. The results of this study suggest that mandibular implants supporting fixed prostheses are not likely to improve oral tactile sensibility and maximal occlusal force in the presence of maxillary complete dentures.
对21名佩戴上颌全口义齿和由布兰emark种植体支持的下颌固定义齿的无牙患者记录了最大咬合力和口腔触觉敏感度。使用微型力传感器测量对抗性磨牙和前磨牙之间的咬合力，并用弹簧秤在水平和垂直方向记录种植体的被动触觉敏感度。使用钢箔（100至10微米）测试主动触觉敏感度。记录的最大咬合力范围为35至330N，在第二前磨牙上观察到最高值（平均143N）。在磨牙和第一前磨牙上发现的力明显较低（p<0.01）。水平方向最小压力的检测阈值约为330g，垂直方向为388g。这种差异无统计学意义。在测试钢箔时，每100次记录中错误评估的平均次数为16.6次。在由两个下颌种植体支持并与上颌全口义齿咬合的覆盖义齿上使用这三种测试方式时也发现了类似结果。本研究结果表明，在存在上颌全口义齿的情况下，支持固定义齿的下颌种植体不太可能改善口腔触觉敏感度和最大咬合力。
