Assessment of knee implant alignment using coordinate measurement on three-dimensional computed tomography reconstructions

Surgical Innovation
Andrej M NowakowskiVictor Valderrabano

Abstract

The rapid development of navigation systems designed to improve implant alignment calls for precise methods to verify positioning. One new approach to assess knee implant alignment is coordinate measurement (CM) using reference objects on 3-dimensional reconstructions of computed tomographic (CT) image sequences. The objectives of this study were to determine whether implant alignment can be accurately and precisely examined with CT-based CM, and whether correct positioning of a transversal support implant can be attained using a specially developed aiming instrument. Average deviation of CT measurements from those made with a digital caliper remained within the caliper's range of error. This level of accuracy was observer independent. CT-based CM can be used for accurate and precise alignment verification. As well, precise alignment of transversal support can be achieved during implantation with a conventional aiming device, assuming the bony landmarks are appropriately recognized.

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Citations

Nov 1, 2013·Surgical and Radiologic Anatomy : SRA·Valentin ZumsteinMagdalena Müller-Gerbl
May 27, 2014·International Orthopaedics·Andrej Maria NowakowskiMagdalena Müller-Gerbl
Jul 3, 2013·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Valentin ZumsteinMagdalena Müller-Gerbl
Jul 15, 2015·International Orthopaedics·Csaba Forster-HorvathAndrej Maria Nowakowski
Feb 5, 2016·Foot & Ankle International·Martin WiewiorskiAlexej Barg
Jul 22, 2018·International Orthopaedics·Thomas NeriFrederic Farizon
Feb 8, 2020·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Petros IsmailidisAndrej Maria Nowakowski

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