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Koenen P, Schneider MM, Fröhlich M, et al. Reliable Alignment in Total Knee Arthroplasty by the Use of an iPod-Based Navigation System. Adv Orthop. 2016;2016:2606453doi: 10.1155/2016/2606453.
Koenen, P., Schneider, M. M., Fröhlich, M., Driessen, A., Bouillon, B., & Bäthis, H. (2016). Reliable Alignment in Total Knee Arthroplasty by the Use of an iPod-Based Navigation System. Advances in orthopedics, 20162606453. https://doi.org/10.1155/2016/2606453
Koenen, Paola, et al. "Reliable Alignment in Total Knee Arthroplasty by the Use of an iPod-Based Navigation System." Advances in orthopedics vol. 2016 (2016): 2606453. doi: https://doi.org/10.1155/2016/2606453
Koenen P, Schneider MM, Fröhlich M, Driessen A, Bouillon B, Bäthis H. Reliable Alignment in Total Knee Arthroplasty by the Use of an iPod-Based Navigation System. Adv Orthop. 2016;2016:2606453. doi: 10.1155/2016/2606453. Epub 2016 May 30. PMID: 27313898; PMCID: PMC4904084.
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Adv Orthop. 2016;2016:2606453. doi: 10.1155/2016/2606453. Epub 2016 May 30.

Reliable Alignment in Total Knee Arthroplasty by the Use of an iPod-Based Navigation System.

Advances in orthopedics

Paola Koenen, Marco M Schneider, Matthias Fröhlich, Arne Driessen, Bertil Bouillon, Holger Bäthis

Affiliations

  1. Department of Orthopaedics, Trauma Surgery and Sports Medicine, Cologne Merheim Medical Center, Witten/Herdecke University, 51109 Cologne, Germany.
  2. Department of Orthopaedics, Trauma Surgery and Sports Medicine, Cologne Merheim Medical Center, Witten/Herdecke University, 51109 Cologne, Germany; Department of Orthopaedic Surgery, Schulthess Clinic, 8008 Zurich, Switzerland.

PMID: 27313898 PMCID: PMC4904084 DOI: 10.1155/2016/2606453

Abstract

Axial alignment is one of the main objectives in total knee arthroplasty (TKA). Computer-assisted surgery (CAS) is more accurate regarding limb alignment reconstruction compared to the conventional technique. The aim of this study was to analyse the precision of the innovative navigation system DASH® by Brainlab and to evaluate the reliability of intraoperatively acquired data. A retrospective analysis of 40 patients was performed, who underwent CAS TKA using the iPod-based navigation system DASH. Pre- and postoperative axial alignment were measured on standardized radiographs by two independent observers. These data were compared with the navigation data. Furthermore, interobserver reliability was measured. The duration of surgery was monitored. The mean difference between the preoperative mechanical axis by X-ray and the first intraoperatively measured limb axis by the navigation system was 2.4°. The postoperative X-rays showed a mean difference of 1.3° compared to the final navigation measurement. According to radiographic measurements, 88% of arthroplasties had a postoperative limb axis within ±3°. The mean additional time needed for navigation was 5 minutes. We could prove very good precision for the DASH system, which is comparable to established navigation devices with only negligible expenditure of time compared to conventional TKA.

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