Gigandet Michel, Bigolin Gianni, Faoro Francisco, Bürgin Walter, Brägger Urs
School of Dental Medicine, University of Bern, Bern, Switzerland.
Clin Implant Dent Relat Res. 2014 Apr;16(2):303-11. doi: 10.1111/j.1708-8208.2012.00479.x. Epub 2012 Jul 16.
To test in vitro the mechanical resistance, rotational misfit and failure mode of three original implant-abutment connections and to compare them to two connections between non-original abutments connected to one of the original implants.
Three different implants with small diameters (3.3 mm for Straumann Roxolid, 3.5 mm for Nobel Biocare Replace and Astra Tech Osseospeed TX) were connected with individualized titanium abutments. Twelve implants from each system were connected to their original abutments (Straumann CARES, Nobel Biocare Procera, Astra Tech Atlantis). Twenty-four Roxolid implants were connected with non-original abutments using CAD/CAM procedures from the other two manufacturers (12 Nobel Biocare Procera and 12 Astra Tech Atlantis). For the critical bending test, a Zwick/Roell 1475 machine and the Xpert Zwick/Roell software were used.
The rotational misfit varied when comparing the different interfaces. The use of non-original grade V titanium abutments on Roxolid implants increased the force needed for deformation. The fracture mode was different with one of the original connections.
Non-original abutments differ in design of the connecting surfaces and material and demonstrate higher rotational misfit. These differences may result in unexpected failure modes.
在体外测试三种原装种植体-基台连接的机械阻力、旋转不匹配和失效模式，并将其与连接到其中一种原装种植体的两种非原装基台之间的连接进行比较。
三种不同直径的种植体（士卓曼Roxolid为3.3毫米，诺贝尔生物科技Replace和阿斯利康Osseospeed TX为3.5毫米）与个性化钛基台相连。每个系统的12颗种植体与它们的原装基台（士卓曼CARES、诺贝尔生物科技Procera、阿斯利康Atlantis）相连。24颗Roxolid种植体使用另外两家制造商的CAD/CAM程序与非原装基台相连（12颗诺贝尔生物科技Procera和12颗阿斯利康Atlantis）。对于临界弯曲试验，使用了Zwick/Roell 1475机器和Xpert Zwick/Roell软件。
比较不同界面时，旋转不匹配情况有所不同。在Roxolid种植体上使用非原装V级钛基台增加了变形所需的力。其中一种原装连接的断裂模式不同。
非原装基台在连接表面设计和材料方面存在差异，并表现出更高的旋转不匹配。这些差异可能导致意外的失效模式。
