McCartney J W
J Prosthet Dent. 1980 Jan;43(1):15-21. doi: 10.1016/0022-3913(80)90346-7.
An investigation was conducted on the effect of various rest-clasp designs on abutment tooth movement when a testing prosthesis was subjected to vertical loading of the bilateral distal-extension base. The results did not reveal statistically significant differences among the rest-clasp designs tested. Variations in rest placement and/or clasp design had an effect on the magnitude and direction of force transmission to, and resultant movement of, the abutment tooth. Less force to the abutment tooth was recorded when a mesial rest was used with the rest-clasp designs as compared to a distal rest. Force transmission to the abutment was found to be greater when the vertical load was applied to the denture base on the same side than when applied to the opposite side of the denture base.
当测试义齿承受双侧远中游离端基托的垂直加载时，对各种支托卡环设计对基牙移动的影响进行了研究。结果显示，在所测试的支托卡环设计之间，没有统计学上的显著差异。支托位置和/或卡环设计的变化会影响传递到基牙的力的大小和方向以及基牙的最终移动。与远中支托相比，在支托卡环设计中使用近中支托时，记录到的基牙受力较小。发现当垂直载荷施加在义齿基托的同侧时，传递到基牙的力比施加在义齿基托的对侧时更大。
