Geary C, Jones E, Fitzpatrick D, Kelly C P, Birkinshaw C
Department of Materials Science and Technology, University of Limerick, Limerick, Ireland.
Proc Inst Mech Eng H. 2010;224(4):551-63. doi: 10.1243/09544119JEIM626.
A polyurethane glenoid component has been designed and manufactured as part of a total shoulder arthroplasty (TSA) system based on compliant-layer (CL) technology. Compared with conventional TSA designs, this biomimetic approach offers reduced friction and wear and potentially improved longevity. In-vitro evaluation of the glenoid system has included loosening and stability tests, and wear measurement using a specially constructed wear simulator. The results obtained support the hypothesis that a CL glenoid design may provide improved resistance to dynamic loosening and rim erosion, and demonstrate superior wear performance over a standard ultra-high molecular weight polyethylene design. This study not only confirms the feasibility of a CL glenoid component but also highlights the potential to increase implant longevity, thereby allowing earlier surgical intervention before poor glenoid bone stock and soft tissue compromise the outcome of TSA.
一种聚氨酯关节盂组件已被设计并制造出来，作为基于柔顺层（CL）技术的全肩关节置换术（TSA）系统的一部分。与传统的TSA设计相比，这种仿生方法可减少摩擦和磨损，并有可能提高使用寿命。对关节盂系统的体外评估包括松动和稳定性测试，以及使用专门构建的磨损模拟器进行磨损测量。获得的结果支持这样的假设，即CL关节盂设计可能提供更好的抗动态松动和边缘侵蚀能力，并在标准超高分子量聚乙烯设计之上展现出卓越的磨损性能。这项研究不仅证实了CL关节盂组件的可行性，还突出了提高植入物使用寿命的潜力，从而能够在关节盂骨量不佳和软组织影响TSA结果之前更早地进行手术干预。
