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Radiographic Accuracy in TKA with a CT-based Patient-specific Cutting Block Technique

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Publisher Wiley
Date 2013 Aug 15
PMID 23942882
Citations 35
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Abstract

Purpose: Patient-specific instrumentation (PSI) technology for the implantation of total knee arthroplasty (TKA) has a rising interest in the orthopaedic community. Data of PSI are controversially discussed. The hypothesis of this paper is that the radiological accuracy of CT-based PSI is similar to the one of navigated TKA published in the literature.

Methods: Since 2010, all 301 consecutively performed PSI TKAs (GMK MyKnee©) were included in this study. The radiological assessment consisted in a preoperative and postoperative standard X-ray and long-standing X-ray. Changes from the planned to the definitively implanted component size were documented. Postoperative analysis included limb alignment and position of femoral and tibial components (for varus/valgus and flexion or tibial slope).

Results: The postoperative average hip-knee-ankle angle was 180.1° ± 2.0°. In the frontal plane a total of 12.4 % of outliers >3°, for the tibial components 4.1 % of outliers >3° and for the femoral components 4.8 % of outliers >3° were measured. A total of 12.3 % of outliers for posterior tibial slope and 9 % of outliers >3° for the femoral flexion were noted. 10.8 % of the 602 planned size components were adapted intraoperatively.

Conclusion: Although it is still unknown which limb axis is the correct one for the best clinical result, a technology providing the aimed axis in a most precise way should be chosen. Comparing the outcome of the current study with the data from the literature, there does not seem to be any difference compared to computer-assisted surgery.

Level Of Evidence: IV.

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References
1.
Daniilidis K, Tibesku C . Frontal plane alignment after total knee arthroplasty using patient-specific instruments. Int Orthop. 2012; 37(1):45-50. PMC: 3532632. DOI: 10.1007/s00264-012-1732-1. View

2.
Stronach B, Pelt C, Erickson J, Peters C . Patient-specific total knee arthroplasty required frequent surgeon-directed changes. Clin Orthop Relat Res. 2012; 471(1):169-74. PMC: 3528928. DOI: 10.1007/s11999-012-2573-3. View

3.
Nunley R, Ellison B, Zhu J, Ruh E, Howell S, Barrack R . Do patient-specific guides improve coronal alignment in total knee arthroplasty?. Clin Orthop Relat Res. 2011; 470(3):895-902. PMC: 3270188. DOI: 10.1007/s11999-011-2222-2. View

4.
Brin Y, Nikolaou V, Joseph L, Zukor D, Antoniou J . Imageless computer assisted versus conventional total knee replacement. A Bayesian meta-analysis of 23 comparative studies. Int Orthop. 2010; 35(3):331-9. PMC: 3047658. DOI: 10.1007/s00264-010-1008-6. View

5.
Cheng T, Zhao S, Peng X, Zhang X . Does computer-assisted surgery improve postoperative leg alignment and implant positioning following total knee arthroplasty? A meta-analysis of randomized controlled trials?. Knee Surg Sports Traumatol Arthrosc. 2011; 20(7):1307-22. DOI: 10.1007/s00167-011-1588-8. View