Comparing two surgical techniques for recurrent patellar dislocation

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study evaluates the effectiveness of dynamic versus static medial patellofemoral ligament (MPFL) reconstruction techniques in preventing patellar instability and improving patient quality of life. It aims to compare clinical and functional outcomes between the two surgical approaches, addressing common complications associated with static reconstruction. The dynamic technique, developed by Becher, is designed to minimize issues such as graft malpositioning and overtensioning, which are prevalent in traditional static methods. Patients with chronic patellar instability will be included based on specific criteria related to their condition severity and anatomical factors.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Patients treated with isolated dynamic (operation procedure according to Becher et al.using the gracilis tendon) or static MPFL plastic (operation procedure according to Schöttle et al. using the gracilis tendon). MPFL reconstruction will be performed in patients with preceding patella dislocation with: 1) a Patella-Instability-Severity (PIS) score ≤ 3 with concomitant flake fracture or 2) a PIS score ≥ 4 with clinical asymptomatic trochlea dysplasia (patella stability between 30°-60° knee flexion) without other clinically relevant static risk factors.
* Closed growth plates

Exclusion Criteria:

* Combined procedures with trochleoplasty (high grade trochlea dysplasia, type Dejour C,D with clinical instability between 30° and 60° of knee flexion)
* combined procedures with cartilage transplantation
* High grade patellofemoral arthritis (Kellgren Lawrence score ≥3)
* combined procedures with femoral or tibial osteotomy
* Clinically eminent valgus axis (\>15° valgus)
* Femoral internal rotation \>20°, tibial external rotation \>40°
* Instability of the cruciate or collateral ligaments
* Known significant musculoskeletal disease
* Cognitive impairment

Where it's running

• Department of Orthopaedics and Traumatology, University Hospital Basel
  Basel, Switzerland Recruiting
• Department of Orthopaedics and Traumatology, Swiss Altius Medical Clinic
  Rheinfelden, Switzerland Recruiting

Study contacts

• Principal investigator: Christian Egloff, PD Dr. med. — Department of Orthopaedics and Traumatology, University Hospital Basel
• Study coordinator: Christian Egloff, PD Dr. med.
• Email: christian.egloff@usb.ch
• Phone: +41 79 75 33 72 4

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.