基于3D光学扫描仪的膝关节假体磨损分布检测
Wear Distribution Detection of Knee Joint Prostheses by Means of 3D Optical Scanners.
作者信息
Affatato Saverio, Valigi Maria Cristina, Logozzo Silvia
机构信息
Medical Technology Laboratory, Rizzoli Orthopaedic Institute, 40136 Bologna, Italy.
Department of Engineering, University of Perugia, 06125 Perugia, Italy.
出版信息
Materials (Basel). 2017 Mar 30;10(4):364. doi: 10.3390/ma10040364.
The objective of this study was to examine total knee polyethylene inserts from in vitro simulation to evaluate and display-using a 3D optical scanner-wear patterns and wear rates of inserts exposed to wear by means of simulators. Various sets of tibial inserts have been reconstructed by using optical scanners. With this in mind, the wear behavior of fixed and mobile bearing polyethylene knee configurations was investigated using a knee wear joint simulator. After the completion of the wear test, the polyethylene menisci were analyzed by an innovative 3D optical scanners in order to evaluate the 3D wear distribution on the prosthesis surface. This study implemented a new procedure for evaluating polyethylene bearings of joint prostheses obtained after in vitro wear tests and the proposed new approach allowed quantification of the contact zone on the geometry of total knee prostheses. The results of the present study showed that mobile TKPs (total knee prosthesis) have lower wear resistance with respect to fixed TKPs.
本研究的目的是通过体外模拟来检测全膝关节聚乙烯垫片，利用三维光学扫描仪评估并展示垫片在模拟器作用下的磨损模式和磨损率。通过光学扫描仪重建了多组胫骨垫片。基于此，使用膝关节磨损模拟器研究了固定和活动承重聚乙烯膝关节结构的磨损行为。磨损试验完成后，通过创新的三维光学扫描仪对聚乙烯半月板进行分析，以评估假体表面的三维磨损分布。本研究实施了一种新程序，用于评估体外磨损试验后获得的关节假体聚乙烯轴承，所提出的新方法能够对全膝关节假体几何形状上的接触区域进行量化。本研究结果表明，与固定全膝关节假体相比，活动全膝关节假体的耐磨性较低。
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