The replacement of arthritic small joints, such as the fingers and wrist, has typically involved the use of one-piece silicone rubber implants. Newer designs have involved the silicone moving against either a titanium or ultrahigh molecular weight polyethylene (UHMWPE) component. The aim of this study was to investigate the wear of medical grade silicone rubber against titanium and UHMWPE. A pin-on-disc apparatus was used to slide a titanium and UHMWPE pin against a silicone disc, in the presence of either a Ringer's solution or bovine serum lubricant. Testing was undertaken at a sliding speed of 0.079 m/s and was continued for 10 km. Wear factors for titanium against silicone were 40.0 x 10(-6) mm(3)/N m and 66.5 x 10(-6) mm(3)/N m for bovine serum and Ringer's solution, respectively. The wear factors for UHMWPE against silicone were higher with values of 84.4 x 10(-6) mm(3)/N m and 88.3 x 10(-6) mm(3)/N m for bovine serum and Ringer's solution, respectively. The results of this study will be useful in future designs of finger and wrist implants that combine silicone rubber with either titanium or UHMWPE.
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机译：关节小关节（例如手指和腕部）的更换通常涉及一件式硅橡胶植入物的使用。较新的设计涉及使硅树脂抵制钛或超高分子量聚乙烯（UHMWPE）组分。这项研究的目的是研究医用级硅橡胶对钛和UHMWPE的磨损。在林格氏溶液或牛血清润滑剂存在的情况下，使用销钉盘设备将钛和UHMWPE销钉抵靠在硅胶盘上。测试以0.079 m / s的滑动速度进行，并持续了10 km。钛对硅树脂的磨损系数分别为牛血清和林格氏溶液的40.0 x 10（-6）mm（3）/ N m和66.5 x 10（-6）mm（3）/ N m。 UHMWPE对有机硅的磨损因数较高，牛血清和林格氏液分别为84.4 x 10（-6）mm（3）/ N m和88.3 x 10（-6）mm（3）/ N m。这项研究的结果对于将来将硅橡胶与钛或UHMWPE结合起来的手指和手腕植入物的设计很有用。
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