氧化锆和钴铬假体的 TKA 中聚乙烯磨损颗粒的重量相似。
Weight of polyethylene wear particles is similar in TKAs with oxidized zirconium and cobalt-chrome prostheses.
机构信息
The Joint Replacement Center of Korea, Ewha Womans University School of Medicine, 911-1 MokDong, YangCheon-Gu, Seoul 158-710, Korea.
出版信息
Clin Orthop Relat Res. 2010 May;468(5):1296-304. doi: 10.1007/s11999-009-1179-x. Epub 2009 Dec 1.
BACKGROUND
The greater lubricity and resistance to scratching of oxidized zirconium femoral components are expected to result in less polyethylene wear than cobalt-chrome femoral components.
QUESTIONS/PURPOSES: We examined polyethylene wear particles in synovial fluid and compared the weight, size (equivalent circle diameter), and shape (aspect ratio) of polyethylene wear particles in knees with an oxidized zirconium femoral component with those in knees with a cobalt-chrome femoral component.
PATIENTS AND METHODS
One hundred patients received an oxidized zirconium femoral component in one knee and a cobalt-chrome femoral component in the other. There were 73 women and 27 men with a mean age of 55.6 years (range, 44-60 years). The minimum followup was 5 years (mean, 5.5 years; range, 5-6 years). Polyethylene wear particles were analyzed using thermogravimetric methods and scanning electron microscopy.
RESULTS
The weight of polyethylene wear particles produced at the bearing surface was 0.0223 +/- 0.0054 g in 1 g synovial fluid in patients with an oxidized zirconium femoral component and 0.0228 +/- 0.0062 g in patients with a cobalt-chrome femoral component. Size and shape of polyethylene wear particles were 0.59 +/- 0.05 microm and 1.21 +/- 0.24, respectively, in the patients with an oxidized zirconium femoral component and 0.52 +/- 0.03 microm and 1.27 +/- 0.31, respectively, in the patients with a cobalt-chrome femoral component. Knee Society knee and function scores, radiographic results, and complication rate were similar between the knees with an oxidized zirconium and cobalt-chrome femoral component.
CONCLUSIONS
The weight, size, and shape of polyethylene wear particles were similar in the knees with an oxidized zirconium and a cobalt-chrome femoral component. We found the theoretical advantages of this surface did not provide the actual advantage.
LEVEL OF EVIDENCE
Level I, therapeutic study. See the guidelines for Authors for a complete description of levels of evidence.
背景
氧化锆股骨部件的更大的润滑性和抗划伤性预计会导致比钴铬股骨部件更少的聚乙烯磨损。
问题/目的：我们检查了滑液中的聚乙烯磨损颗粒，并比较了具有氧化锆股骨部件的膝关节和具有钴铬股骨部件的膝关节中的聚乙烯磨损颗粒的重量、大小（等效圆直径）和形状（纵横比）。
患者和方法
100 名患者在一侧膝关节中接受氧化锆股骨部件，在另一侧膝关节中接受钴铬股骨部件。73 名女性和 27 名男性，平均年龄 55.6 岁（范围，44-60 岁）。最低随访 5 年（平均，5.5 年；范围，5-6 年）。使用热重法和扫描电子显微镜分析聚乙烯磨损颗粒。
结果
在氧化锆股骨部件患者的 1 克滑液中，在轴承表面产生的聚乙烯磨损颗粒的重量为 0.0223 +/- 0.0054 g，在钴铬股骨部件患者中为 0.0228 +/- 0.0062 g。氧化锆股骨部件患者的聚乙烯磨损颗粒的大小和形状分别为 0.59 +/- 0.05 微米和 1.21 +/- 0.24，钴铬股骨部件患者的分别为 0.52 +/- 0.03 微米和 1.27 +/- 0.31。膝关节学会膝关节和功能评分、影像学结果和并发症发生率在氧化锆和钴铬股骨部件的膝关节之间相似。
结论
氧化锆和钴铬股骨部件的膝关节中的聚乙烯磨损颗粒的重量、大小和形状相似。我们发现这种表面的理论优势并没有提供实际优势。
证据水平
I 级，治疗研究。有关证据水平的完整描述，请参见作者指南。
Zotero 插件