Ron Batash1, Guy Rubin2, Alexander Lerner3, Hussein Shehade4, Nimrod Rozen2, David E Rothem5. 1. Faculty of Medicine, Bar-Ilan, Zeffat, Israel. 2. Orthopedic Department, Emek Medical Center, Afula, Israel; Faculty of Medicine, Technion, Haifa, Israel. 3. Faculty of Medicine, Bar-Ilan, Zeffat, Israel; Orthopedic Department, Ziv Medical Center, Zefat, Israel. 4. Orthopedic Department, Ziv Medical Center, Zefat, Israel. 5. Faculty of Medicine, Bar-Ilan, Zeffat, Israel; Orthopedic Department, Ziv Medical Center, Zefat, Israel. Electronic address: david.r@ziv.health.gov.il.
Abstract
BACKGROUND: Successful total knee arthroplasty (TKA) includes accurate alignment. Controversy remains as to whether computer-navigated TKA improves the overall result and clinical outcome. Our aim is to compare the limb alignment and prosthesis positioning according to the pre- and postoperative computed tomography (CT) scans with the data collected from the navigation system. METHODS: We compared the pre- and postoperative limb alignments and prosthesis alignment provided by the Orthopilot navigation system, Aesculap®, with CT scans measured by the Traumacad® software of 70 TKAs. RESULTS: A positive correlation with statistical significance (P=0.00001, r=0.874) between the navigation system data and the CT images was found. Mean femoral cut was five degrees (valgus), and mean tibial cut was one degree (varus). Our study revealed that the navigation system assisted the surgeon to implant the prosthesis at a good acceptable alignment. CONCLUSION: We found that the navigation system is accurate and correlates to the pre- and postoperative CT scans. Furthermore, the navigation system can assist the surgeon to achieve good limb alignment and cutting planes of the prosthesis.
BACKGROUND: Successful total knee arthroplasty (TKA) includes accurate alignment. Controversy remains as to whether computer-navigated TKA improves the overall result and clinical outcome. Our aim is to compare the limb alignment and prosthesis positioning according to the pre- and postoperative computed tomography (CT) scans with the data collected from the navigation system. METHODS: We compared the pre- and postoperative limb alignments and prosthesis alignment provided by the Orthopilot navigation system, Aesculap®, with CT scans measured by the Traumacad® software of 70 TKAs. RESULTS: A positive correlation with statistical significance (P=0.00001, r=0.874) between the navigation system data and the CT images was found. Mean femoral cut was five degrees (valgus), and mean tibial cut was one degree (varus). Our study revealed that the navigation system assisted the surgeon to implant the prosthesis at a good acceptable alignment. CONCLUSION: We found that the navigation system is accurate and correlates to the pre- and postoperative CT scans. Furthermore, the navigation system can assist the surgeon to achieve good limb alignment and cutting planes of the prosthesis.
Authors: Carlos Daniel Novoa-Parra; R Sanjuan-Cerveró; N H de la Iglesia; N Franco-Ferrando; R Larrainzar-Garijo; A Lizaur-Utrilla Journal: Eur J Orthop Surg Traumatol Date: 2020-09-04