Does Rigid Bracing Arm Harm the Abutment Tooth of Removable Partial Denture?

研究游离端鞍形局部义齿固位体对基牙的影响。当远端支架与支臂配合使用时，会导致基牙的水平压力增加。而支臂与中托结合使基牙压力向牙轴方向移动，水平方向压力减小。结果表明，托牙的位置和支托作用的程度会影响义齿基牙的压力。

The influences of the retainer of the free end saddle partial denture to the abutment tooth were examined. When the distal rest was applied with bracing arm, it led to increase of the horizontal pressure to the abutment tooth. But the bracing arm in combination with mesial rest led the abutment tooth pressure to the tooth axis direction, and the horizontal direction pressure was reduced. It was suggested that the pressure of the denture abutment tooth tends to be affected by the position of the rest and the degree ofbracing action.