Myers R E, Pfeifer D L, Mitchell D L, Pelleu G B
J Prosthet Dent. 1986 Dec;56(6):702-7. doi: 10.1016/0022-3913(86)90149-6.
With a distal-extension removable partial denture, maximum use of existing oral structures can aid in the total support of the prosthesis and reduce the force on the solitary abutment. Four rests with relieved and unrelieved guide plates were evaluated for optimum stress distribution around the root of a solitary premolar abutment. These rests were the mesial, the distal, the mesial and distal, and the continuous rest. The findings demonstrated that The continuous rest had the most favorable stress concentration. All other rest designs demonstrated more lateral stress than the continuous rest. Relieved guide plates demonstrated 58% less maximum shear stress in the apical portion than unrelieved guide plates.
对于远中游离可摘局部义齿，最大限度地利用现有的口腔结构有助于义齿的整体支持，并减少对单根基牙的作用力。对带有缓冲和未缓冲导板的四种支托进行了评估，以确定单根前磨牙基牙根周的最佳应力分布。这些支托分别是近中支托、远中支托、近远中支托和连续支托。研究结果表明，连续支托的应力集中最有利。所有其他支托设计所产生的侧向应力均大于连续支托。与未缓冲导板相比，缓冲导板在根尖部分的最大剪切应力降低了58%。
