P M Tscholl1,2, F Wanivenhaus3, V Centmaier-Molnar3, R S Camenzind3, S F Fucentese3. 1. Balgrist University Hospital, Orthopaedic Department, University of Zurich, Forchstrasse 340, CH-8008, Zurich, Switzerland. Ph.Tscholl@sunrise.ch. 2. Department of Orthopaedics and Traumatology, University of Geneva, Rue Gabrielle-Perret-Gentil 4, 1205, Geneva, Switzerland. Ph.Tscholl@sunrise.ch. 3. Balgrist University Hospital, Orthopaedic Department, University of Zurich, Forchstrasse 340, CH-8008, Zurich, Switzerland.
Abstract
PURPOSE: Medial patellofemoral ligament reconstruction (MPFLR) shows low recurrent rates and high satisfaction. Reports on outcome at mid-term follow-up in a large cohort with or without tibial tubercle transfer (TTT) are scarce. METHODS: One hundred six patients (115 knees; 24.3 ± 8.7 years) with recurrent patellar dislocation underwent MPFLR with ipsilateral gracilis autograft and were included in this retrospective follow-up study. In 43 knees, simultaneous TTT was performed for patellar maltracking due to patella alta or increased tibial tubercle trochlear groove distance (TT-TG). Kujala and subjective knee scores were recorded pre- and post-operatively. RESULTS: Eighty-seven percent of the patients were satisfied at a mean follow-up of 5.4 ± 3.1 years. The Kujala score increased in 81.7% of all knees from 50.9 to 76.2 points (p < 0.01). Patients with a decreased Kujala score were not different in terms of follow-up time, age, trochlear dysplasia, or post-operative patellar height. The decline was related to an increase in pain, whereas functional scores remained identical. There were six patients with persisting instability, three with patellar re-dislocation. Re-operation was necessary in 24 patients (21.2%), mainly for implant removal after TTT and loss of flexion. Performing TTT had no significant influence on the subjective outcome. Patients with more than eight years of follow-up (n = 27) did not show any difference in the subjective outcome parameters, or in osteoarthritis progression. CONCLUSION: MPFLR with and without TTT is a reliable treatment option for recurrent patellar dislocation without deterioration at mid-term follow-up. Persisting pain is a major post-operative issue that seems to be unrelated to patellofemoral anatomy.
PURPOSE: Medial patellofemoral ligament reconstruction (MPFLR) shows low recurrent rates and high satisfaction. Reports on outcome at mid-term follow-up in a large cohort with or without tibial tubercle transfer (TTT) are scarce. METHODS: One hundred six patients (115 knees; 24.3 ± 8.7 years) with recurrent patellar dislocation underwent MPFLR with ipsilateral gracilis autograft and were included in this retrospective follow-up study. In 43 knees, simultaneous TTT was performed for patellar maltracking due to patella alta or increased tibial tubercle trochlear groove distance (TT-TG). Kujala and subjective knee scores were recorded pre- and post-operatively. RESULTS: Eighty-seven percent of the patients were satisfied at a mean follow-up of 5.4 ± 3.1 years. The Kujala score increased in 81.7% of all knees from 50.9 to 76.2 points (p < 0.01). Patients with a decreased Kujala score were not different in terms of follow-up time, age, trochlear dysplasia, or post-operative patellar height. The decline was related to an increase in pain, whereas functional scores remained identical. There were six patients with persisting instability, three with patellar re-dislocation. Re-operation was necessary in 24 patients (21.2%), mainly for implant removal after TTT and loss of flexion. Performing TTT had no significant influence on the subjective outcome. Patients with more than eight years of follow-up (n = 27) did not show any difference in the subjective outcome parameters, or in osteoarthritis progression. CONCLUSION: MPFLR with and without TTT is a reliable treatment option for recurrent patellar dislocation without deterioration at mid-term follow-up. Persisting pain is a major post-operative issue that seems to be unrelated to patellofemoral anatomy.
Authors: Philippe M Tscholl; Alexander Antoniadis; Tobias J Dietrich; Peter P Koch; Sandro F Fucentese Journal: Knee Surg Sports Traumatol Arthrosc Date: 2014-10-19 Impact factor: 4.342
Authors: Alexander E Weber; Amit Nathani; Joshua S Dines; Answorth A Allen; Beth E Shubin-Stein; Elizabeth A Arendt; Asheesh Bedi Journal: J Bone Joint Surg Am Date: 2016-03-02 Impact factor: 5.284
Authors: Paula Giesler; Frederic A Baumann; Dominik Weidlich; Dimitrios C Karampinos; Matthias Jung; Christian Holwein; Julia Schneider; Alexandra S Gersing; Andreas B Imhoff; Fabian Bamberg; Pia M Jungmann Journal: Skeletal Radiol Date: 2021-07-04 Impact factor: 2.199