{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,9,26]],"date-time":"2022-09-26T04:28:59Z","timestamp":1664166539464},"reference-count":29,"publisher":"Georg Thieme Verlag KG","issue":"02","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Knee Surg"],"published-print":{"date-parts":[[2021,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This work was designed to compare the intraoperative parameters and clinical and radiologic outcomes of total knee arthroplasty (TKA) during a minimum follow-up period of 2\u2009years and to discuss the pros and cons of two different tracker placement (diaphyseal and metaphyseal) navigation systems. The null hypothesis was that there would be no clinical or radiologic difference between the two different systems. Primary TKA was performed in a total of 100 knees using the two different image-free navigation systems (group 1: diaphyseal tracker placement and group 2: metaphyseal tracker placement) with the strict gap balancing technique. Symptom severity was assessed at preoperative and at 3, 6, 12, and 24\u2009months after surgery using the Knee Society Score (KSS) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score. Possible adverse issues (major and minor) associated with TKA procedure were observed. Careful assessments were also made of the screw insertion site for infection, stress fractures, and any other related adverse effects. The follow-up periods for groups 1 and 2 were 38\u2009\u00b1\u20098\u2009months and 38\u2009\u00b1\u20097\u2009months, respectively. The minimum follow-up period was 24\u2009months. The mechanical alignment improved to 0.1 (valgus)\u2009\u00b1\u20092.2 (group 1) and 0.2 (valgus)\u2009\u00b1\u20092.1 (group 2). There were no radiologic differences between the groups (p\u2009&gt;\u20090.05). In both groups, the KSS and WOMAC improved from before surgery to 24\u2009months after surgery (p\u2009&lt;\u20090.0001). However, the total operation time was 50\u2009\u00b1\u20095\u2009minutes for group 1, compared to 65\u2009\u00b1\u200913\u2009minutes for group 2 (p\u2009&lt;\u20090.0001). The metaphyseal tracker navigation system resulted in increased operation time.<\/jats:p>","DOI":"10.1055\/s-0039-1693747","type":"journal-article","created":{"date-parts":[[2019,8,5]],"date-time":"2019-08-05T06:30:31Z","timestamp":1564986631000},"page":"216-223","source":"Crossref","is-referenced-by-count":0,"title":["Comparative Analysis of Diaphyseal versus Metaphyseal tracker Placement in Imageless Navigation Systems for Total Knee Arthroplasty"],"prefix":"10.1055","volume":"34","author":[{"given":"Jae-Hyuk","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Hanyang University Medical Center, Guri Hospital, Guri, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jung-Ro","family":"Yoon","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Veterans Health Service Medical Center, Seoul, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jin Kyu","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Hanyang University Medical Center, Seoul Hospital, Seoul, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2019,8,2]]},"reference":[{"issue":"03","key":"ref1","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1080\/000164700317411852","article-title":"Patient satisfaction after knee arthroplasty: a report on 27,372 knees operated on between 1981 and 1995 in Sweden","volume":"71","author":"O Robertsson","year":"2000","journal-title":"Acta Orthop Scand"},{"issue":"01","key":"ref2","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1177\/1553350610382012","article-title":"Clinical and radiographic outcomes of image-based computer-assisted total knee arthroplasty: an evidence-based evaluation","volume":"18","author":"T Cheng","year":"2011","journal-title":"Surg Innov"},{"issue":"11","key":"ref3","doi-asserted-by":"crossref","first-page":"3565","DOI":"10.1007\/s00167-016-4337-1","article-title":"Current state of the art in total knee arthroplasty computer navigation","volume":"24","author":"F Picard","year":"2016","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"09","key":"ref4","doi-asserted-by":"crossref","first-page":"971","DOI":"10.3928\/0147-7447-20030901-40","article-title":"Fine tuning your next total knee: computer assisted surgery","volume":"26","author":"K A Krackow","year":"2003","journal-title":"Orthopedics"},{"issue":"04","key":"ref5","doi-asserted-by":"crossref","first-page":"269","DOI":"10.5792\/ksrr.17.032","article-title":"Comparison of an accelerometer-based portable navigation system, patient-specific instrumentation, and conventional instrumentation for femoral alignment in total knee arthroplasty","volume":"29","author":"K Kawaguchi","year":"2017","journal-title":"Knee Surg Relat Res"},{"issue":"01","key":"ref6","doi-asserted-by":"crossref","first-page":"64","DOI":"10.5792\/ksrr.17.056","article-title":"Effects of femoral lateral bowing on coronal alignment and component position after total knee arthroplasty: a comparison of conventional and navigation-assisted surgery","volume":"30","author":"C W Kim","year":"2018","journal-title":"Knee Surg Relat Res"},{"issue":"10","key":"ref7","doi-asserted-by":"crossref","first-page":"1796","DOI":"10.1016\/j.arth.2013.04.043","article-title":"In vivo gap analysis in various knee flexion angles during navigation-assisted total knee arthroplasty","volume":"28","author":"J R Yoon","year":"2013","journal-title":"J Arthroplasty"},{"issue":"07","key":"ref8","doi-asserted-by":"crossref","first-page":"2012","DOI":"10.1007\/s00167-014-2879-7","article-title":"Does patella position influence ligament balancing in total knee arthroplasty?","volume":"23","author":"J R Yoon","year":"2015","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"issue":"03","key":"ref9","doi-asserted-by":"crossref","first-page":"358","DOI":"10.1016\/j.arth.2008.01.001","article-title":"Soft tissue balance measurement in posterior-stabilized total knee arthroplasty with a navigation system","volume":"24","author":"T Matsumoto","year":"2009","journal-title":"J Arthroplasty"},{"issue":"05","key":"ref10","doi-asserted-by":"crossref","first-page":"609","DOI":"10.1302\/0301-620X.96B5.32516","article-title":"Functional outcome and alignment in computer-assisted and conventionally operated total knee replacements: a multicentre parallel-group randomised controlled trial","volume":"96-B","author":"O G\u00f8thesen","year":"2014","journal-title":"Bone Joint J"},{"issue":"07","key":"ref11","doi-asserted-by":"crossref","first-page":"1307","DOI":"10.1007\/s00167-011-1588-8","article-title":"Does computer-assisted surgery improve postoperative leg alignment and implant positioning following total knee arthroplasty? 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