Better short-term function after unicompartmental compared to total knee arthroplasty.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: The authors declare that they have no conflict of interest for the work under consideration. Outside this work the following conflicts of interest exist: Jörg Lützner has received grants and personal fees from Aesculap and Mathys as well as grants from Link, Smith&Nephew, Stryker and Zimmer Biomet. 10. Int Orthop. 2017 Nov;41(11):2265-2271. doi: 10.1007/s00264-017-3633-9. Epub 2017 Sep 14. Improved joint-line restitution in unicompartmental knee arthroplasty using a robotic-assisted surgical technique. Herry Y(1), Batailler C(1), Lording T(2), Servien E(1), Neyret P(1), Lustig S(3). Author information: (1)Centre Albert-Trillat, CHU Lyon Croix-Rousse, Hospices Civils de Lyon, 69004, Lyon, France. (2)Melbourne Orthopaedic Group, Melbourne, VIC, Australia. (3)Centre Albert-Trillat, CHU Lyon Croix-Rousse, Hospices Civils de Lyon, 69004, Lyon, France. sebastien.lustig@gmail.com. PURPOSE: Joint-line restitution is one objective of unicompartmental knee arthroplasty (UKA). However, the joint line is often lowered when resurfacing femoral implants are used. The aim of this study was to compare the joint-line height in UKA performed by robotic-assisted and conventional techniques. METHODS: This retrospective case-control study compared two matched groups of patients receiving a resurfacing UKA between 2013 and 2016 by either a robotic-assisted (n = 40) or conventional (n = 40) technique. Each group comprised 27 women and 13 menm wuth a mean age of 69 and 68 years, respectively. Indications for surgery were osteoarthritis (n = 35) and condylar osteonecrosis (n = 5). Two validated radiologic measurement methods were used to assess joint-line height. RESULTS: Forty UKA (23 medial and 17 lateral) were analysed in each group. Restitution of joint-line height was significantly improved in the robotic-assisted group compared than the control group: +1.4 mm ±2.6 vs +4.7 mm ± 2.4 (p