Patellar Dislocation
Conditions
Brief summary
The purpose of this study is to elucidate surgical techniques for reconstructing MPFL in the treatment of chronic patella instability. The two techniques are conventional technique with the gracillis and screw fixation in the femur which is compared with new technique where the QT tendons and anchor fixation in the femur are used. It would be investigated which technique provides the best stability with the least postoperative pain from the reconstruction and the lowest frequency of patellar reluxation.
Interventions
PROCEDUREQuadriceps graft
Using quadriceps graft as new medial patellofemoral ligament graft. Fixated with suture anchor
Sponsors
Aarhus University Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Intervention model description
1. Standard: Gracillis graft 2. Intervention: Quadriceps graft
Eligibility
Sex/Gender
ALL
Age
15 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Patients between 15 and 40 years of age with chronic tendency to lateral patellar dislocation (defined as 2 or more verified dislocation cases) * The growth zones must be found closed - verified by MRI scan
Exclusion criteria
* Patients with known rheumatoid arthritis. * Patients with arthroscopically detected osteoarthritis (grade 3 cartilage lesion) * Inability to follow a normal rehabilitation regime. * Previous ligament surgery in injured knees.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Kujala (Anterior Knee Pain Scale) | 24 month | Patient reported outcome score, 0=worst and 100=best |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Knee injury and Osteoarthritis Outcome Score (KOOS) | 24 month | Patient reported outcome score, 0=worst and 100=best |
| Lysholm-Tegner (Activity Score) | 24 month | Patient reported outcome score, 0=worst and 100=best |
| Donor site morbidity score, 0=worst and 100=best | 24 month | Patient reported outcome score |
| Knee pain | 24 month | Palpatory pain in relation to graft fixation in femur on a four-point likert scale (no pain, mild pain, moderate pain, severe pain) |
| Patella Re-luxation sensation | 24 month | Question about how often the patella has dislocated after the surgery. (no dislocation, 1-2 dislocation/md, more dislocation). |
| Numerical Rating Scale (NRS-pain score) | 24 month | Patient reported outcome score, 0=Best and 10=worst |
Countries
Denmark
Outcome results
None listed