Comparison of Midterm Outcomes of Minimally Invasive Computer-Assisted vs Minimally Invasive Jig-Based Total Knee Arthroplasty

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• 作者：Masahiro Hasegawa ; MD ; PhD ; Shinichi Miyazaki ; MD ; PhD ; Toshio Yamaguchi ; MD ; PhD ; Hiroki Wakabayashi ; MD ; PhD ; Akihiro Sudo ; MD ; PhD
• 关键词：total knee arthroplasty ; computer-assisted navigation surgery ; minimally invasive surgery ; midterm results ; posterior stabilized
• 刊名：The Journal of Arthroplasty
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：32
• 期：1
• 页码：43-46
• 全文大小：277 K
• 卷排序：32

文摘

Minimally invasive surgery (MIS) has perceived advantages in the early postoperative stage for total knee arthroplasty (TKA). It is not clear whether the improved radiographic alignment achieved by computer-assisted navigation surgery (CAS) improves midterm clinical outcomes. The aim of this study was to compare patient outcomes of MIS TKA performed with and without CAS after a minimum follow-up of 7 years.MethodsBetween 2007 and 2009, 50 patients underwent CAS and MIS TKA, and 50 patients underwent jig-based MIS TKA in this prospective study. Ninety-six patients were evaluated after a mean follow-up of 7.7 years, and clinical and radiological evaluations were performed.ResultsMidterm results demonstrated that the Knee Society knee score, function score, and range of motion were comparable in the 2 groups. The percentage of patients with the mechanical axis within ±3° of neutral was significantly higher in the CAS group than in the jig-based group (94% vs 79%, respectively; P = .038). No knees had loosening after TKA. However, 1 patient in the CAS group demonstrated late infection 4 years postoperatively.ConclusionCAS did not improve midterm outcomes after MIS TKA compared with jig-based surgery, although CAS reduced outliers in coronal alignment.