Sansom B P, Flinton R J, Parks V J, Pelleu G B, Kingman A
J Prosthet Dent. 1987 Jul;58(1):57-62. doi: 10.1016/s0022-3913(87)80144-0.
Forty-five photoelastic stress analyses were conducted with two-dimensional models of one side of a mandibular Kennedy class III removable partial denture. Fifteen separate rest seat configurations were tested for each of three varied inclinations of the distal second molar abutment. The data indicate that: Rest seat placement on an abutment tooth primarily affects stress concentration of that tooth. There is no direct relationship between rest seat design on one abutment and resultant stress on another. Inclined abutments demonstrate greater resultant bending of interradicular bone than vertical abutments, and the greater the inclination, the greater the bending (as the result of tipping force). Mesial rests on inclined molar abutments demonstrate maximum tipping forces. Channel rests on inclined molar abutments demonstrate the least amount of tipping force.
对下颌Kennedy III类可摘局部义齿一侧的二维模型进行了45次光弹性应力分析。针对远中第二磨牙基牙的三种不同倾斜度，分别测试了15种不同的支托凹形态。数据表明：支托凹放置在基牙上主要影响该牙的应力集中。一个基牙上的支托凹设计与另一基牙上的合成应力之间没有直接关系。倾斜基牙比垂直基牙表现出更大的根间骨合成弯曲，倾斜度越大，弯曲越大（由于倾斜力）。倾斜磨牙基牙上的近中支托表现出最大的倾斜力。倾斜磨牙基牙上的沟形支托表现出最小的倾斜力。
