Eckert Johannes Adrian, Mueller Ulrike, Walker Tilman, Schwarze Martin, Jaeger Sebastian, Kretzer Jan Philippe
Laboratory of Biomechanics and Implant Research, Clinic for Orthopedics and Trauma Surgery, Heidelberg University Hospital, Schlierbacher Landstraße 200a, 69118 Heidelberg, Germany.
Materials (Basel). 2020 Oct 15;13(20):4589. doi: 10.3390/ma13204589.
The medial Oxford unicompartmental knee arthroplasty (OUKA) shows good survivorship, as well as clinical results. Aseptic loosening, however, remains one of the main reasons for revision and polyethylene debris is known to cause aseptic loosening. The role of bearing thickness in total as well as unicondylar knee arthroplasty has been the subject of controversial discussions, especially the longevity of lower thickness bearings in total knee arthroplasty was questioned. The purpose of this study was to assess the influence of bearing thickness on time to revision, damage pattern, penetration, and volumetric material loss. A cohort of 47 consecutively retrieved medial OUKA bearings was analyzed with conventional direct light microscopy applying the Hood damage analysis, as well as measuring the penetration depth. In this retrieval cohort, a difference on survival time, damage, penetration, as well as volumetric material loss could not be seen. We conclude that low as well as high thickness bearings can safely be used in OUKA without any relevant differences in terms of wear and damage.
牛津内侧单髁膝关节置换术（OUKA）显示出良好的生存率以及临床效果。然而，无菌性松动仍然是翻修的主要原因之一，并且已知聚乙烯碎屑会导致无菌性松动。在全膝关节置换术以及单髁膝关节置换术中，假体衬垫厚度的作用一直是有争议的讨论话题，尤其是全膝关节置换术中较薄假体衬垫的使用寿命受到质疑。本研究的目的是评估假体衬垫厚度对翻修时间、损伤模式、穿透情况以及材料体积损失的影响。对一组连续取出的47个内侧OUKA假体衬垫进行分析，采用传统的直接光学显微镜检查并应用胡德损伤分析方法，同时测量穿透深度。在这个取出的队列中，未发现生存率、损伤、穿透以及材料体积损失方面存在差异。我们得出结论，在OUKA中，薄的和厚的假体衬垫都可以安全使用，在磨损和损伤方面没有任何相关差异。
