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Which tendon best fixes a slipping kneecap? a surgical showdown

NCT ID NCT07785570

Disease control Sponsor: Cairo University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 25, 2026 · Last updated Aug 26, 2026 · Updated 1 time

Summary

This trial compares two surgical techniques for repairing the ligament that keeps the kneecap in place, in people with recurrent patellar dislocation. One method uses a hamstring tendon graft, the other uses a quadriceps tendon graft. The study will measure knee function, pain, and stability to see if one approach leads to better outcomes.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
MPFL reconstruction using either a hamstring tendon graft or a quadriceps tendon graft
What this could lead to
If one graft proves superior, it could guide surgeons toward a better standard technique for stabilizing the kneecap and improving long-term knee function.
What could go wrong
This is a small, early comparative study, so results may not apply to all patients. Surgery carries typical risks like infection, stiffness, or recurrent dislocation.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

38 people

The number who actually took part.

Started

Jun 2018

Finished

Jun 2022

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients with recurrent patellar instability who underwent medial patellofemoral ligament reconstruction using either a hamstring tendon graft or a quadriceps tendon graft.

Ages

18 to 40 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Patients with recurrent patellar dislocation. * Age from 18 to 40 years. * Patients indicated for isolated medial patellofemoral ligament (MPFL) reconstruction. Exclusion Criteria: 1. Patients with trochlear dysplasia (Dejour B-C-D). 2. Patients with clinical evidence of mal-alignment (varus, valgus, flat foot and femoral anteversion). 3. Patients with congenital pateller dislocation. 4. Patella alta and patella baja. 5. Previous quadriceps muscles operation. 6. Patients with patellofemoral OA. 7. Patients with hypermobility syndrome. 8. Patients with associated pathology.

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Conditions

The condition(s) this trial relates to.

Patellar Dislocation

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Recurrent patellar dislocation

Contacts and locations

Locations

  • Cairo University Hospitals (Kasr Al-Ainy)

    Cairo, Egypt