PURPOSE: Flexion contracture has been shown to impair function and reduce satisfaction following total knee arthroplasty (TKA). The aim of this study was to identify modifiable intra-operative variables that predict post-TKA knee extension. METHODS: Data was collected prospectively on 95 patients undergoing total knee arthroplasty, including pre-operative assessment, intra-operative computer assisted surgery (CAS) measurements and functional outcome including range of motion at one year. Patients were divided into two groups: those with mild flexion contracture (> 5°) at the one-year follow-up and those achieving full extension. RESULTS: The sagittal orientation of the distal femoral cut differed significantly between groups at the one-year follow-up (p = 0.014). Sagittal alignment of greater than 3.5° from the mechanical axis was shown to increase the relative risk of a mild flexion contracture at one-year follow-up by 2.9 times, independent of other variables. CONCLUSION: Increasing the sagittal alignment of the distal femoral cut more than 3.5° from the mechanical axis is an independent risk factor for clinically detectable flexion contracture one year from index procedure.
PURPOSE:Flexion contracture has been shown to impair function and reduce satisfaction following total knee arthroplasty (TKA). The aim of this study was to identify modifiable intra-operative variables that predict post-TKA knee extension. METHODS: Data was collected prospectively on 95 patients undergoing total knee arthroplasty, including pre-operative assessment, intra-operative computer assisted surgery (CAS) measurements and functional outcome including range of motion at one year. Patients were divided into two groups: those with mild flexion contracture (> 5°) at the one-year follow-up and those achieving full extension. RESULTS: The sagittal orientation of the distal femoral cut differed significantly between groups at the one-year follow-up (p = 0.014). Sagittal alignment of greater than 3.5° from the mechanical axis was shown to increase the relative risk of a mild flexion contracture at one-year follow-up by 2.9 times, independent of other variables. CONCLUSION: Increasing the sagittal alignment of the distal femoral cut more than 3.5° from the mechanical axis is an independent risk factor for clinically detectable flexion contracture one year from index procedure.
Authors: Lisa Case Doro; Richard E Hughes; Joshua D Miller; Karl F Schultz; Brian Hallstrom; Andrew G Urquhart Journal: Open Biomed Eng J Date: 2008-09-10
Authors: Jean Yves Lazennec; Quentin Chometon; Dominique Folinais; Christopher B Robbins; Aidin Eslam Pour Journal: Int Orthop Date: 2016-11-14 Impact factor: 3.075
Authors: Marco A Marra; Marta Strzelczak; Petra J C Heesterbeek; Sebastiaan A W van de Groes; Dennis Janssen; Bart F J M Koopman; Nico Verdonschot; Ate B Wymenga Journal: Knee Surg Sports Traumatol Arthrosc Date: 2018-03-20 Impact factor: 4.342