Department of Biomedical Development, AO Research Institute Davos, Davos, Switzerland.
Department of Traumatology and Reconstructive Surgery, BG Traumacenter Tübingen, University of Tübingen, Tübingen, Germany.
J Orthop Res. 2021 Jan;39(1):130-135. doi: 10.1002/jor.24782. Epub 2020 Jun 29.
Malalignment of the femur is a frequently encountered problem in orthopaedics entailing manifold consequences for the affected patients. Corrective osteotomies, necessary to restore the physiological and anatomical relationships, face great challenges due to no existing reliable gold standard for intraoperative control of torsional malalignment. The aim of this study was to test a novel radiography-based navigation tool for control of derotational osteotomies in a clinical environment. In a first-and preliminary-case-controlled study on 12 patients (level 3 of evidence), the achieved torsional correction measured with implementation of the navigation tool was compared with measurements from pre- and postoperative computed tomography (CT) scans. The navigation tool was able to acquire and process all relevant data and capture possible malrotation during surgery with only little deviations of 1.61° ± 0.86° (mean ± standard deviation) from the measurements based on CT scans. Next, the system will be used to assist surgeons for more precise treatment avoiding maltorsion after derotational osteotomies.
股骨对线不良是矫形外科中经常遇到的问题，会给患者带来多种后果。为了恢复生理和解剖关系，需要进行矫正截骨术，但由于术中扭转对线不良的控制没有可靠的金标准，因此面临着巨大的挑战。本研究旨在测试一种新的基于放射影像学的导航工具，以控制临床环境中的旋转截骨术。在一项对 12 名患者的首次和初步病例对照研究中（证据 3 级），将导航工具实施后的测量结果与术前和术后计算机断层扫描（CT）测量结果进行了比较。导航工具能够获取和处理所有相关数据，并在手术过程中捕获可能的旋转，与基于 CT 扫描的测量值相比，仅存在 1.61°±0.86°（平均值±标准差）的小偏差。接下来，该系统将用于辅助外科医生进行更精确的治疗，避免在旋转截骨术后发生扭转。
