Kang K-T, Son J, Suh D-S, Kwon S K, Kwon O-R, Koh Y-G
Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea.
Department of Orthopaedic Surgery, Joint Reconstruction Center, Yonsei Sarang Hospital, 10 Hyoryeong-ro, Seocho-gu, Seoul 06698, South Korea.
Bone Joint Res. 2018 Jan;7(1):20-27. doi: 10.1302/2046-3758.71.BJR-2017-0115.R2.
Patient-specific (PS) implantation surgical technology has been introduced in recent years and a gradual increase in the associated number of surgical cases has been observed. PS technology uses a patient's own geometry in designing a medical device to provide minimal bone resection with improvement in the prosthetic bone coverage. However, whether PS unicompartmental knee arthroplasty (UKA) provides a better biomechanical effect than standard off-the-shelf prostheses for UKA has not yet been determined, and still remains controversial in both biomechanical and clinical fields. Therefore, the aim of this study was to compare the biomechanical effect between PS and standard off-the-shelf prostheses for UKA.
The contact stresses on the polyethylene (PE) insert, articular cartilage and lateral meniscus were evaluated in PS and standard off-the-shelf prostheses for UKA using a validated finite element model. Gait cycle loading was applied to evaluate the biomechanical effect in the PS and standard UKAs.
The contact stresses on the PE insert were similar for both the PS and standard UKAs. Compared with the standard UKA, the PS UKA did not show any biomechanical effect on the medial PE insert. However, the contact stresses on the articular cartilage and the meniscus in the lateral compartment following the PS UKA exhibited closer values to the healthy knee joint compared with the standard UKA.
The PS UKA provided mechanics closer to those of the normal knee joint. The decreased contact stress on the opposite compartment may reduce the overall risk of progressive osteoarthritis.: K-T. Kang, J. Son, D-S. Suh, S. K. Kwon, O-R. Kwon, Y-G. Koh. Patient-specific medial unicompartmental knee arthroplasty has a greater protective effect on articular cartilage in the lateral compartment: A Finite Element Analysis. 2018;7:20-27. DOI: 10.1302/2046-3758.71.BJR-2017-0115.R2.
患者特异性（PS）植入手术技术近年来已被引入，且观察到相关手术病例数量逐渐增加。PS技术在设计医疗设备时采用患者自身的几何形状，以实现最小限度的骨切除并改善假体对骨的覆盖。然而，PS单髁膝关节置换术（UKA）是否比标准的现成假体UKA具有更好的生物力学效果尚未确定，在生物力学和临床领域仍存在争议。因此，本研究的目的是比较PS和标准现成假体UKA之间的生物力学效果。
使用经过验证的有限元模型，评估PS和标准现成假体UKA中聚乙烯（PE）衬垫、关节软骨和外侧半月板上的接触应力。应用步态周期负荷来评估PS和标准UKA中的生物力学效果。
PS和标准UKA中PE衬垫上的接触应力相似。与标准UKA相比，PS UKA在内侧PE衬垫上未显示出任何生物力学效果。然而，与标准UKA相比，PS UKA后外侧间室的关节软骨和半月板上的接触应力值更接近健康膝关节。
PS UKA提供的力学性能更接近正常膝关节。对侧间室接触应力的降低可能会降低进行性骨关节炎的总体风险。：K-T.康、J.孙、D-S.苏、S.K.权、O-R.权、Y-G. Koh。患者特异性内侧单髁膝关节置换术对外侧间室的关节软骨具有更大的保护作用：有限元分析。2018；7：20-27。DOI：10.1302/2046-3758.71.BJR-2017-0115.R2 。
Zotero 插件
