Amis A A, Kempson S A
Mechanical Engineering Department, Imperial College, London, England.
J Long Term Eff Med Implants. 1999;9(1-2):153-68.
A series of polyester fiber ACL implants was studied in ovine stifle joints up to 2 years postimplantation. The implants were linked to the bone-tunnel wall by oriented fibrous tissue. Cross-sections of the tunnels showed bone ingrowth among the implant fibers at 2 years. A human trial of the Apex implant yielded a series of retrievals, some associated with gross bone-tunnel enlargement. There was no evidence of bone ingrowth in the human implants. It was hypothesized that-tunnel enlargement resulted from fretting at the implant-tissue interface in response to cyclic loads in use.
对一系列聚酯纤维前交叉韧带（ACL）植入物在绵羊膝关节中进行了研究，观察期长达植入后2年。植入物通过定向纤维组织与骨隧道壁相连。隧道的横截面显示，在2年时骨长入植入物纤维之间。对Apex植入物进行的人体试验产生了一系列取出的样本，其中一些与骨隧道明显扩大有关。在人体植入物中没有骨长入的证据。据推测，隧道扩大是由于植入物与组织界面处因使用中的循环载荷而产生微动所致。
