Dynamic tracking influenced by anatomy following medial patellofemoral ligament reconstruction: Computational simulation.

摘要: Abstract Background Continued patellar instability can occur following medial patellofemoral ligament (MPFL) reconstruction. Computational simulation of function was used to investigate the influence lateral position tibial tuberosity, trochlear dysplasia and patella alta on tracking MPFL Methods Multibody dynamic models were developed represent nine knees being treated for recurrent instability. Knee extension against gravity dual limb squatting simulated with without Graft resting lengths set allow 10 mm five millimeters translation at 30° knee flexion. The bisect offset index, tuberosity posterior cruciate attachment (TT–PCL) distance, inclination, Caton–Deschamps index quantified every degrees flexion characterize tracking, dysplasia, alta, respectively. For pre-operative post-operative conditions each type motion, correlated anatomical parameters using stepwise multivariate linear regression. Results both motions, indices significantly inclination TT–PCL distance. adjusted r2 decreased reconstruction, but still approximately 0.5 reconstruction allowing translation. Conclusion decreases does not eliminate maltracking related a lateralized tuberosity. Patients these pathologies are likely highest risk