The goal of this observational study is to learn about the outcomes of medial patellofemoral ligament (MPFL) reconstruction for the treatment of recurrent patellar instability. The main questions it aims to answer are:
* What are the risk factors for recurrent patellar instability after MPFL reconstruction? * What functional outcomes do patients report after MPFL reconstruction?
Participants undergoing MPFL reconstruction will answer survey questions about their knee and activity level 1 year and 2 years after surgery.
10-35 years old
Recurrent patellar instability with at least one episode defined as either (1) a dislocated patella requiring reduction in the emergency department or (2) a convincing history for dislocation, associated with full giving way, and the following physical findings: (a) hemarthrosis or effusion, (b) tenderness along the medial retinaculum, and (c) apprehension when laterally directed force was applied to the patella or (3) MRI-documented dislocation with associated bone bruises
Previous ipsilateral knee surgery
Obligatory/fixed/habitual patella dislocation or subluxation
Unloadable inferior or lateral chondral damage on the patella that would require a tibial tubercle transfer for unloading purposes
Pathologic tibiofemoral instability
Hospital for Special Surgery, New York
Lead sponsor
American Orthopaedic Society for Sports Medicine
Collaborator
Orthopedic Research and Education Foundation
Collaborator
Children's Hospital Medical Center, Cincinnati
Collaborator