低磨损率和更长的寿命

低骨溶解风险

研究表明陶瓷摩擦副造成骨溶解的潜在风险要比高交联聚乙烯低50倍。这是陶瓷磨损颗粒的低生物活性和陶瓷本身的低磨损量的共同结果。磨损率与球头直径无关, 即陶瓷大球头不会造成摩擦学性能的改变。相比而言,聚乙烯摩擦副的主要缺点是随着球头的增大,聚乙烯的磨损也会加剧。

陶瓷球头使假体寿命更长

陶瓷球头可使聚乙烯的磨损明显降低到0.1mm/年以下。与金属球头不同,陶瓷球头不会被划伤。与金属对聚乙烯摩擦副相比,BIOLOX®forte对聚乙烯摩擦副可降低假体松动、翻修等相关并发症2到5倍。

临床结果显示,无论哪种假体系统,聚乙烯的磨损率超过0.2mm/年。当金属球头被使用过时,表面的划伤会造成聚乙烯更大的磨损。金属球头的表面常有细小的划伤。实验室研究证明使用过的金属球头会增加约30倍的聚乙烯磨屑。

体内线性磨损率

In vivo linear Wear Rates

不同摩擦副的线性磨损率:不同的高交联聚乙烯在金属对高交联聚乙烯的研究中表现出差异性很大的结果。

文献来源:
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