Krishnan Munish R, Rajaratnam Joshua D, Peiris Dylan, Gupta Manish, Wigmore Estelle, Heinrichs Christian
Department of Orthopaedics, Nepean Hospital, Kingswood, NSW, Australia.
360 Med Care, Pymble, NSW, Australia.
Shoulder Elbow. 2024 Jul 23:17585732241265627. doi: 10.1177/17585732241265627.
Reverse total shoulder arthroplasty has gained popularity for various shoulder conditions and has evolved over time to accommodate for material changes and design philosophy including inverse materials. The tribological behaviour of shoulder arthroplasty has been extensively studied in relation to biological osteolysis which is a notable concern regarding component loosening.
This study aims to assess the wear performance of a vitamin E-stabilised glenosphere or conventional ultra-high-molecular-weight polyethylene glenosphere whilst paired with ceramic or cobalt-chrome-molybdenum inlay in a shoulder joint wear simulator. A cumulative total of five million cycles was utilised with gravimetric and visual analysis of wear.
Gravimetric wear was observed to be the lowest when a vitamin E-stabilised glenosphere was paired with a ceramic inlay - demonstrating the greatest wear resistance.
Our results demonstrate that the combination of vitamin E-stabilised polyethylene glenosphere and ceramic inlay has improved wear resistance properties in load simulations when compared to other bearing surface combinations. This supports the use of the novel inverse combination in clinical practice to attain longer-term survivorship in reverse total shoulder replacements.
Basic Science Study; Tribology.
反向全肩关节置换术因各种肩部疾病而受到欢迎，并随着时间的推移不断发展，以适应材料变化和设计理念，包括反向材料。肩关节置换术的摩擦学行为已针对生物性骨溶解进行了广泛研究，而生物性骨溶解是组件松动的一个显著问题。
本研究旨在评估维生素E稳定的球窝臼或传统超高分子量聚乙烯球窝臼与陶瓷或钴铬钼嵌体在肩关节磨损模拟器中配对时的磨损性能。总共进行了500万次循环，并对磨损进行了重量分析和视觉分析。
当维生素E稳定的球窝臼与陶瓷嵌体配对时，重量磨损最低，表明其耐磨性最强。
我们的结果表明，与其他轴承表面组合相比，维生素E稳定的聚乙烯球窝臼和陶瓷嵌体的组合在负载模拟中具有更好的耐磨性能。这支持在临床实践中使用这种新型反向组合，以在反向全肩关节置换术中获得更长的使用寿命。
基础科学研究；摩擦学。
