Balfour A, O'Brien G R
Southern California Implant Institute, Glendale.
J Prosthet Dent. 1995 Jan;73(1):36-43. doi: 10.1016/s0022-3913(05)80270-7.
Identifying the functional and mechanical limitations of single tooth implant systems is essential for the long-term success of the restoration. Three designs with different prosthetic connections were evaluated with their corresponding single tooth abutments for structural integrity and cyclic fatigue. The internal implant octagon was the weakest connection under off-axis impact loading and lateral loading, and the external hexagon implant was rendered unrestorable under lateral loading. Overall, the internal hexagon design was found to provide the highest degree of single tooth stability. This was attributed to the increased material strength of the titanium alloy implant in comparison to the softer CP titanium implant, and to the abutment's longer, 1-degree tapered mating hexagon.
识别单颗牙种植系统的功能和机械局限性对于修复体的长期成功至关重要。对三种具有不同修复连接方式的设计及其相应的单颗牙基台进行了结构完整性和循环疲劳评估。种植体内部八角形在非轴向冲击载荷和侧向载荷下是最薄弱的连接，而外部六角形种植体在侧向载荷下无法修复。总体而言，发现内部六角形设计提供了最高程度的单颗牙稳定性。这归因于与较软的纯钛种植体相比，钛合金种植体材料强度的增加，以及基台更长的、1度锥形配合六角形。
