Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium.
J Arthroplasty. 2011 Jan;26(1):58-64. doi: 10.1016/j.arth.2009.11.007. Epub 2010 Feb 19.
Seventy consecutive osteoarthritis patients younger than 65 years undergoing a hip arthroplasty were included. Three different metal bearings were used (2 different resurfacing systems and one 28-mm metal bearing) and compared with a ceramic control group. Whole blood cobalt and chromium levels were analyzed preoperatively, at 3 months, 6 months, 1 year, and 2 years. Patients with steep cups (abduction >55°) were excluded. No significant differences in functional scores and activity level were found between either groups. Ion levels were significantly lower with one type of resurfacing. No correlation was found between ion and activity level. In conclusion, although the current second-generation metal bearings may show differences in ion release, more attention should be paid to the correlation between ion release and implant positioning.
70 例年龄小于 65 岁的骨关节炎患者接受髋关节置换术。使用了三种不同的金属轴承（两种不同的表面置换系统和一种 28 毫米金属轴承），并与陶瓷对照组进行比较。在术前、术后 3 个月、6 个月、1 年和 2 年时分析全血钴和铬水平。排除了外展角大于 55°的陡峭杯患者。两组之间的功能评分和活动水平没有显著差异。一种表面置换的离子水平明显较低。离子与活动水平之间没有相关性。总之，尽管目前的第二代金属轴承可能在离子释放方面存在差异，但应更加关注离子释放与植入物定位之间的相关性。
