MPFL Reconstruction With or Without Tibial Tubercle Transfer

Study Overview
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Brief Summary
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This study aims to compare the clinical outcome of Medial PatelloFemoral Ligament (MPFL) reconstruction with and without tibial tubercle transfer for recurrent patellar dislocation.

Detailed Description
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70 patients with recurrent patellar instability were randomly assigned to undergo MPFL reconstruction with or without tibial tubercle transfer. Follow-ups were performed at 12 and 24 months postoperatively, and computed tomography (CT) was performed immediately after the operation and at follow-up. The knee function was evaluated preoperatively and at 2 years postoperatively using Lysholm,Tegner and Kujala scales. Redislocation or multiple episodes of patellar instability were considered failures.

Official Title
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Medial Patellofemoral Ligament (MPFL) Reconstruction With or Without Tibial Tubercle Transfer for Recurrent Patellar Instability

Conditions
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Patellar Dislocation

Intervention / Treatment
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* Procedure: MPFL reconstruction
* Procedure: tibial tubercle transfer


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: recurrent patellar dislocation or instability,patients with TT-TG value equal to or greater than 20 mm,patients with closed epiphyseal plate TT-TG：Two lines drawn perpendicular to posterior bicondylar line, one line through middle of the trochlear groove(TG) and the second through tibial tuberosity (TT). Distance between the lines is measured. Exclusion Criteria: bilateral patellar dislocation, a previous surgery in the involved leg,patients with open epiphyseal plate,patients with severe trochlear dysplasia

Ages Eligible for Study
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Maximum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: MPFLR without tibial tubercle transfer<br>Patients with patellar instability undergo MPFL reconstruction without tibial tubercle transfer. | Procedure: MPFL reconstruction<br>* to correct patellar dislocation with medial patellofemoral ligament reconstruction<br>Procedure: tibial tubercle transfer<br>* to correct patellar dislocation with tibial tubercle medial transfer<br>|
| Active Comparator: MPFLR with tibial tubercle transfer<br>Patients with patellar instability undergo MPFL reconstruction with tibial tubercle transfer. | Procedure: MPFL reconstruction<br>* to correct patellar dislocation with medial patellofemoral ligament reconstruction<br>Procedure: tibial tubercle transfer<br>* to correct patellar dislocation with tibial tubercle medial transfer<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Lysholm score of the knee | Lysholm score of the knee was evaluated preoperatively and at 2 years post operation . Scale name:score | two years | 
| Tegner score of the knee | Tegner score of the knee was evaluated preoperatively and at 2 years post operation . Scale name:score | two years | 
| Kujala score of the knee | Kujala score of the knee was evaluated preoperatively and at 2 years post operation . | two years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| CT images of the knee | CT was performed immediately after the operation and at follow-up. | two years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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patellar dislocation, medial patellofemoral ligament, tibial tubercle transfer