Medial Patellofemoral Ligament Reconstruction in Children - a 2-8 Years Follow-up Study
NCT ID: NCT06257836
Last Updated: 2025-10-01
Study Results
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Basic Information
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ACTIVE_NOT_RECRUITING
160 participants
OBSERVATIONAL
2024-03-01
2026-06-01
Brief Summary
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The outcome will be compared with a healthy cohort matched on age and gender.
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Detailed Description
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In chronic patella instability, where the patella has been repeatedly dislocated, the treatment is most often surgical. The main ligamentous structure that stabilizes the patella against lateralization is the medial patello-femoral ligament (MPFL). The MPFL is a centimeter-thin ligamentous structure that runs from the upper medial patellar border to the medial femoral epicondyle. This ligament is torn in more than 90% of cases of PL and healing of the ligament is often insufficient, especially if there are predisposing factors in the knee joint such as dysplasia of the patello-femoral joint, high standing patella (patella alta) and hypermobility.
MPFL reconstruction (MPFL-r) can be performed with many different surgical techniques, but the basic principle is to use autologous tendon tissue to create a new MPFL by anchoring the new tendon tissue to the medial patellar border and the medial femoral epicondyle, while ensuring isometry of the reconstruction.
A number of different methods have been described for anchoring the new MPFL to the patella and femoral condyle.
The most commonly used type of graft for MPFL-r is the gracilis tendon, which is fixed with screws in the femur bone preceded by drilling a channel in the femoral condyle.
In non-grown patients, the growth zone of the distal femur is very close to the anatomical attachment of the MPFL. This poses a problem as a reaming that hits the growth zone carries a theoretical risk of compromising growth around the knee.
In addition, up to 50% of patients describe pain at 1 year after surgery if screw fixation is used in the medial femoral condyle.
A new MPFL-r method using a superficial portion of the quadriceps tendon fixed with an anchor provides a good 2-year result compared to gracilis tendon and screw fixation.
The effectiveness and long-term efficacy of MPFL surgery with the quadriceps tendon for children is not well described in the literature.
At the Department of Sports Traumatology in Aarhus, Denmark, the quadriceps technique has been used on non-adult patients since 2016.
In this study, the investigators want to include the 80 patients who have undergone this MPFL-r since 2016 with the quadriceps tendon technique and have a minimum of 2 years of follow-up. This patient group will compared to a healthy cohort matched on age and gender.
Conditions
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Study Design
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COHORT
PROSPECTIVE
Study Groups
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MPFL reconstruction with quadriceps graft
Children with medial patellofemoral reconstruction operated with epiphyses sparing quadriceps technique from 2016-2022.
MPFL-reconstruction
Children with patella dislocations are operated from 2016-2022 with a quadriceps knee cap stabilization technique.
Healthy Cohort
A healthy cohort matched on age (+/- 2 years) and gender
No interventions assigned to this group
Interventions
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MPFL-reconstruction
Children with patella dislocations are operated from 2016-2022 with a quadriceps knee cap stabilization technique.
Eligibility Criteria
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Inclusion Criteria
* Open physis at surgery date
* Minimum 2 years Follow up
* No knee problems
Exclusion Criteria
* MPFL-r in opposite knee
* MPFL revision in index knee
* None
* No knee problems
14 Years
23 Years
ALL
Yes
Sponsors
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Aarhus University Hospital
OTHER
Responsible Party
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Martin Lind
Professor, PhD, MD
Locations
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Division of Sports Trauma, Palle Juul-Jensens Boulevard 99
Aarhus N, , Denmark
Countries
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Other Identifiers
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Danish EC: 1-10-72-299-21
Identifier Type: -
Identifier Source: org_study_id
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