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- Title
Comparable clinical outcome and implant longevity after CT- or MRI-based patient-specific instruments for total knee arthroplasty: a 2-year follow-up of a RCT.
- Authors
Thijs, Elke; Theeuwen, Dieuwertje; Boonen, Bert; van Haaren, Emil; Hendrickx, Roel; Vos, Rein; Borghans, Rob; Kort, Nanne; Schotanus, Martijn G. M.
- Abstract
Purpose: Patient-specific instruments (PSI) are already widespread used in total knee arthroplasty (TKA). Either computed tomography (CT) scans or magnetic resonance imaging (MRI) scans are used pre-operatively to create jigs to guide resection during surgery. This study is a sequel of previous work that showed significantly more radiological outliers for posterior slope when CT-based guides were used. The aim of this study was to assess differences in revision rate and clinical outcome between the two groups at 2-year follow-up.Methods: At the 2-year follow-up, 124 patients were analysed in this prospective, randomised single-blind study. A survival analysis with revision of the TKA as endpoint was performed. Patients fulfilled four patient-reported outcome measurements (PROMs). Scores on the questionnaires were compared between both groups at the different follow-up visits.Results: At final follow-up, there was no significant difference in the survival rates of the CT- and MRI-based PSI surgery. Postoperatively, the PROMs significantly improved within each group compared with the pre-operative values. There were no significant differences for the PROMs between both groups at the 2-years follow-up.Conclusions: Although previous results showed more outliers regarding posterior slope for CT-based PSIs, no difference in revision rate or the outcome of PROMs was found at 2-year follow-up. Further research to determine what the influence is of radiological outliers on implant survival and clinical outcomes is necessary.Level Of Evidence: I.
- Subjects
TOTAL knee replacement; COMPUTED tomography; MAGNETIC resonance imaging; SURGICAL instruments; OPERATIVE surgery; KNEE surgery; MEDICAL equipment reliability; KNEE diseases; RESEARCH; COMPUTER-assisted surgery; RESEARCH methodology; EVALUATION research; MEDICAL cooperation; ARTIFICIAL joints; COMPARATIVE studies; RANDOMIZED controlled trials; BLIND experiment; REOPERATION; OSTEOARTHRITIS; LONGITUDINAL method
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2020, Vol 28, Issue 6, p1821
- ISSN
0942-2056
- Publication type
Academic Journal
- DOI
10.1007/s00167-019-05616-x