Arthroscopic Trochleaplasty in Chronic Relapsing Patellar Dislocations: A Follow-up Study

NCT06906419 | Enrolling By Invitation

• 1 other identifier: 1000324
• Study Type: observational
• Target: 20
• Locations: 1 country
• Sites: 1

Brief Summary

This study aims to evaluate the long-term clinical outcomes of arthroscopic trochleoplasty in patients treated for chronic recurrent patellar dislocations. The primary objective is to assess the effectiveness of the procedure in reducing the need for re-operations and preventing recurrent instability. Secondary objectives include evaluating postoperative complications, patellofemoral pain, functional outcomes using the Kujala Anterior Knee Pain Scale (AKPS), and quality of life measured by EQ-5D-5L. This retrospective cohort study will analyze data from patient records and structured telephone interviews conducted at least one year post-surgery.

Conditions

Patellar Dislocation

Keywords

patellar dislocation; arthroscopic; trochleaplasty

Outcome Measures

Primary Outcomes (1)

• Re-operation Rate

  Proportion of patients requiring additional surgical interventions after the index surgery at our institution.

  The investigators seek to register any re-operations from the time between the index surgery and the interview, ranging from 1 year up to 7 years postoperatively.

Secondary Outcomes (6)

• Recurrent Instability Rate

  The investigators seek to register any incidences of recurrent instability from the time between the index surgery and the interview, ranging from 1 year up to 7 years postoperatively.

• Postoperative Complications

  The investigators seek to register any complications related to the index surgery from the time between the index surgery and the interview, ranging from 1 year up to 7 years postoperatively.

• Functional Outcome

  At the time of the interview, which will be performed from 1 year up to 7 years postoperatively.

• EQ-5D-5L (HRQoL) scores

  At the time of the follow-up interview, which will be performed from 1 year up to 7 years postoperatively.

• Pain Assessment

  At the time of the follow-up interview, which will be performed from 1 year up to 7 years postoperatively.

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

This retrospective cohort study evaluates the long-term outcomes of arthroscopic trochleoplasty performed to stabilize the patella in patients with chronic recurrent dislocations. The procedure involves deepening the trochlea femoris to enhance patellar tracking and prevent lateral dislocation. In some cases, medial patellofemoral ligament (MPFL) reconstruction was also performed. Data will be collected through patient medical records and structured telephone interviews, focusing on re-operation rates, postoperative complications, pain levels, functional outcomes, and quality of life. The study seeks to provide insights into the effectiveness and safety of this surgical technique, aiming to optimize treatment protocols for patellar instability.

You may qualify if:

• Patients aged 18 years and older.
• Underwent arthroscopic trochleoplasty for chronic recurrent patellar dislocations.
• Surgery performed between 2015 and 2023.
• Availability of follow-up data and consent for participation.

You may not qualify if:

• Concurrent knee surgeries unrelated to trochleoplasty.
• Previous surgeries on the same knee.
• Other significant orthopedic conditions affecting the knee.
• Lack of follow-up data or consent.

Sponsors & Collaborators

• Vestre Viken Hospital Trust: lead

Study Sites (1)

Vestre Viken HF

Drammen, 3004, Norway

Location

MeSH Terms

Conditions

Patellar Dislocation

Condition Hierarchy (Ancestors)

Joint Dislocations; Joint Diseases; Musculoskeletal Diseases; Wounds and Injuries; Knee Injuries; Leg Injuries

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: March 7, 2025
• First Posted: April 2, 2025
• Study Start: May 1, 2025
• Primary Completion: December 31, 2025
• Study Completion: December 31, 2025
• Last Updated: May 14, 2025

Record last verified: 2025-05

Data Sharing

• IPD Sharing: Will not share

Locations

NO (1)