Breeding L C, Dixon D L, Sadler J P, McKay M L
Department of Oral Health Practice, College of Densitry, University of Kentucky, USA.
J Prosthet Dent. 1995 Nov;74(5):487-92. doi: 10.1016/s0022-3913(05)80350-6.
The implant tooth-supported fixed partial denture presents a biomechanical design problem, because the implant is rigidly fixed within the alveolus, and the tooth is surrounded by a periodontal ligament that allows movement. Nonrigid fixed partial denture designs are advocated by some dentists as a method of compensating for this differential movement. Rigid fixed partial denture designs, however, are advocated by many clinicians. Studies have failed to show the advantage of one design over the other. This study developed an in vitro method for testing such prosthesis designs and measured movement of a natural tooth abutment during simulated function. The movement of the natural tooth abutment was not found to change substantially with the fixed partial denture designs tested.
种植体支持的固定局部义齿存在生物力学设计问题，因为种植体被牢固地固定在牙槽骨内，而牙齿被允许移动的牙周膜所包围。一些牙医提倡采用非刚性固定局部义齿设计作为补偿这种差异运动的一种方法。然而，许多临床医生提倡刚性固定局部义齿设计。研究未能表明一种设计优于另一种设计。本研究开发了一种体外方法来测试此类修复体设计，并测量了天然牙基牙在模拟功能期间的运动。在所测试的固定局部义齿设计中，未发现天然牙基牙的运动有实质性变化。
