caa a22 4500 605457751 CHVBK 20210128100225.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00167-014-3264-2 doi (NATIONALLICENCE)springer-10.1007/s00167-014-3264-2 Comparison between patient-specific instruments and conventional instruments and computer navigation in total knee arthroplasty: a randomized controlled trial [Elektronische Daten] [Chun Yan, Kwong Chiu, Fu Ng, Ping Chan, Christian Fang] Purpose: The current study investigated the accuracy in achieving proper lower limb alignment and individual component positions after total knee arthroplasty (TKA) with 3 different instrumentation techniques. It was hypothesized that patient-specific instruments (PSI) would achieve more accurate lower limb alignment and component positions compared to conventional instruments (CON). Methods: Ninety knees in 81 patients were randomized in 1:1:1 ratio into CON, computer navigation (NAV) and PSI groups to receive TKA. The surgical routines were standardized. The lower limb mechanical axis and individual component positions were assessed on standard radiographs. Tourniquet time, operation time and patients' functional scores were documented. Results: Conventional instruments and PSI were more likely to result in an excessively flexed femoral component (p=0.001) compared to NAV. Number of outliers in postoperative lower limb alignment, and other components positions in the coronal and sagittal plane showed no statistically significant difference. The mean tourniquet time and operation time was significantly shorter in CON and PSI groups than NAV group (p<0.001). Four early complications occurred in the PSI group (p=0.015). At 3-month follow-up, there was no difference in terms of the knee range of motion and patients' function among the 3 groups. Conclusion: No significant radiological and clinical benefit could be demonstrated in using PSI over CON or NAV in TKA. Routine use of PSI is not recommended because of the extra cost and waiting time. Level of evidence: I. European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA), 2014 Patient-specific instrumentation nationallicence Total knee arthroplasty nationallicence Computer navigation nationallicence Lower limb alignment nationallicence Component position nationallicence Functional outcomes nationallicence Yan Chun Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut Chiu Kwong Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut Ng Fu Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut Chan Ping Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut Fang Christian Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/12(2015-12-01), 3637-3645 0942-2056 23:12<3637 2015 23 167 https://doi.org/10.1007/s00167-014-3264-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-014-3264-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yan Chun Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut NATIONALLICENCE 700 1- Chiu Kwong Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut NATIONALLICENCE 700 1- Ng Fu Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut NATIONALLICENCE 700 1- Chan Ping Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut NATIONALLICENCE 700 1- Fang Christian Department of Orthopaedics and Traumatology, 5/F, Queen Mary Hospital, The University of Hong Kong, 102 Pokfulam Road, Pokfulam, Hong Kong SAR, China aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/12(2015-12-01), 3637-3645 0942-2056 23:12<3637 2015 23 167