Affatato Saverio, Valigi Maria Cristina, Logozzo Silvia
Laboratorio di Tecnologia Medica, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano, 1/10, 40136 Bologna, Italy.
Dipartimento di Ingegneria, Università degli Studi di Perugia, Via G. Duranti 1, 06125 Perugia, Italy.
Materials (Basel). 2020 May 20;13(10):2349. doi: 10.3390/ma13102349.
It is well known that wear occurring in polyethylene menisci is a significant clinical problem. At this regard, wear tests on biomaterials medical devices are performed in order to assess their pre-clinical performance in terms of wear, durability, resistance to fatigue, etc. The objective of this study was to assess the wear of mobile total knee polyethylene inserts after an wear test. In particular, the wear behavior of mobile bearing polyethylene knee configurations was investigated using a knee joint wear simulator. After the completion of the wear test, the polyethylene mobile menisci were analyzed through a consolidated procedure by using 3D optical scanners, in order to evaluate the 3D wear distribution on the prosthesis surface, wear depths, wear rates, amount of material loss and contact areas. The results in terms of wear rates and wear volumes were compared with results of gravimetric tests, finding equivalent achievements.
众所周知，聚乙烯半月板的磨损是一个重大的临床问题。在这方面，对生物材料医疗设备进行磨损测试，以便从磨损、耐用性、抗疲劳性等方面评估其临床前性能。本研究的目的是评估在进行磨损测试后活动式全膝关节聚乙烯垫片的磨损情况。具体而言，使用膝关节磨损模拟器研究了活动轴承聚乙烯膝关节配置的磨损行为。磨损测试完成后，通过使用3D光学扫描仪的综合程序对聚乙烯活动半月板进行分析，以评估假体表面的3D磨损分布、磨损深度、磨损率、材料损失量和接触面积。将磨损率和磨损体积方面的结果与重量测试结果进行比较，发现结果相当。
