An observational study in Recurrent Patellar Dislocation, sponsored by Cairo University. Completed at 1 site in Egypt. Open to participants aged 18 Years to 40 Years. Per ClinicalTrials.gov, last updated 2026-08-25.
Sponsored by Cairo University · Observational
This prospective comparative study compared the clinical and radiological outcomes of medial patellofemoral ligament (MPFL) reconstruction using a hamstring tendon graft versus a quadriceps tendon graft in patients with recurrent patellar dislocation. The study included 38 patients with 40 affected knees who underwent MPFL reconstruction using either a hamstring tendon graft or a quadriceps tendon graft, according to the treating surgeon's preference. Patients were prospectively followed in two groups according to the graft used. Clinical outcomes were assessed using the Kujala, International Knee Documentation Committee (IKDC), and Tegner-Lysholm scores. Radiological assessment included patellar tilt angle and congruence angle. Postoperative complications and recurrent patellar instability were also evaluated.
41 studies on the registry are indexed under Patellar Dislocation; 9 are open to participants now.
This study's enrollment of 38 is below the median of 100 across 15 observational studies indexed under Patellar Dislocation.
Browse Patellar Dislocation studies →Cairo University is the lead sponsor of 4,941 studies on the registry; 1,458 are open to participants now.
Of its 37 completed or terminated interventional studies of FDA-regulated products, 5 (14%) have results posted.
Counted across the registry records on this site, refreshed daily.
Patients with recurrent patellar instability who underwent medial patellofemoral ligament reconstruction using either a hamstring tendon graft or a quadriceps tendon graft.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Patients who underwent MPFL reconstruction using a hamstring tendon graft.
Procedure: MPFL Reconstruction Using Hamstring Tendon Graft
Patients who underwent MPFL reconstruction using a quadriceps tendon graft.
Procedure: MPFL Reconstruction Using Quadriceps Tendon Graft
Medial patellofemoral ligament reconstruction was performed using an autologous semitendinosus tendon graft. The graft was fixed to the medial aspect of the patella and passed between layers 2 and 3 of the medial knee structures, followed by femoral fixation at the anatomical MPFL insertion.
Medial patellofemoral ligament reconstruction was performed using a distally based superficial quadriceps tendon graft. The graft remained attached to the superior pole of the patella, was passed between layers 2 and 3 of the medial knee structures, and was fixed at the anatomical femoral insertion of the MPFL.
Kujala score
Functional outcome assessed using the Kujala anterior knee pain scale. The score ranges from 0 to 100, with higher scores indicating better knee function and fewer patellofemoral symptoms.
Time frame: 12 months postoperatively
International Knee Documentation Committee (IKDC) Score
Knee function was assessed using the International Knee Documentation Committee (IKDC) score. Scores range from 0 to 100, with higher scores indicating better knee function.
Time frame: 12 months postoperatively
Tegner-Lysholm Knee Score
Knee function was assessed using the Tegner-Lysholm knee score. Scores range from 0 to 100, with higher scores indicating better knee function.
Time frame: 12 months postoperatively
Patellar Tilt Angle
Patellar tilt angle was measured radiologically to assess patellofemoral alignment before and after MPFL reconstruction.
Time frame: 12 months postoperatively
Congruence Angle
Congruence angle was measured radiologically to assess patellofemoral alignment before and after MPFL reconstruction.
Time frame: 12 months postoperatively
Incidence of Re-dislocation
Number of cases who experienced re-dislocation after MPFL reconstruction
Time frame: 12 months postoperatively
Plan to share: No
No publications or documents are linked to this record.
This study is completed, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.