Lower doses of irradiation (≤ 5 Mrad) during the manufacture of highly crosslinked polyethylene acetabular liners may result in less crosslinking and an increased wear rate. Radiostereometric analysis (RSA) studies have found that wear of more highly irradiated highly crosslinked polyethylene liners (7 to 10 Mrad) decreases at longer-term follow-up compared with earlier reports of the same cohorts. Although wear of 5-Mrad irradiated liners appears to increase at midterm follow-up, it is unclear whether that remains true at longer follow-up.

中文翻译：

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5兆拉德高度交联聚乙烯内衬的长期磨损是多少？一项为期 14 年的 RSA 研究。

在制造高度交联的聚乙烯髋臼衬垫期间，较低剂量的照射（≤ 5 Mrad）可能会导致交联减少和磨损率增加。放射立体测量分析 (RSA) 研究发现，与早期报告的同一群体相比，长期随访后，受更高辐射的高度交联聚乙烯内衬（7 至 10 Mrad）的磨损会减少。尽管 5-Mrad 辐照内衬的磨损在中期随访中似乎有所增加，但尚不清楚在长期随访中是否仍然如此。