Clinical trial Recruiting at 1 site Observational Ages 18 to 50

Differences in Outcomes After Allograft vs Autograft in Revision ACL Repair

Official title: Differences in Outcomes and Failure Rates Between Allografts and Autografts in Revision Anterior Cruciate Ligament Reconstruction

Run by Istituto Ortopedico Rizzoli · NCT07671235 · Data updated 2026-11-12

This study looks at whether using donor tissue (allograft) versus the patient’s own tissue (autograft) in revision ACL surgery leads to different results.

Quick facts

Study typeObservational
Ages18 Years to 50 Years
SexAll
Enrollment150 (estimated)
SponsorIstituto Ortopedico Rizzoli
Academic / other
Locations1 site (Bologna, Bologna)
StatusRecruiting
StartedJuly 8, 2026
Main results expectedMay 2027
Study endsMay 2027
Registry record updatedAugust 4, 2026
Trial IDNCT07671235 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 18–50 undergoing revision ACL reconstruction with potential associated procedures and at least 2 years of follow-up.

Probably not a fit

Patients with advanced knee osteoarthritis (Outerbridge III-IV), severe obesity (BMI > 35), or other conditions preventing full weight-bearing may not benefit.

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

What this trial studies

This observational study examines outcomes after revision ACL reconstruction to compare allografts and autografts. It focuses on patients 18–50 undergoing revision surgery and tracks outcomes for at least two years. Graft choice and surgical details may influence stability and rerupture risk, which can be higher in revisions. The study builds on known rerupture rates and aims to clarify how graft type affects overall outcomes in a real-world setting.

Why it matters

Potential benefit: If successful, the findings could help surgeons choose graft type to improve stability and reduce rerupture after revision ACL surgery.

How similar studies have gone: Previous data show differences in outcomes by graft type in ACL surgery, but revision settings are less clear, making this study important for clarification.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 18-50 years at the time of surgery
* Male and female patients
* Patients undergoing revision anterior cruciate ligament (ACL) reconstruction with possible associated procedures, with at least 2 years of follow-up
* Written informed consent to participate in the study

Exclusion criteria:

* Patients lost to follow-up
* Refusal to provide informed consent
* Advanced knee osteoarthritis (Outerbridge grade III-IV) at the time of surgery
* Severe obesity (BMI \> 35)
* Lower limb conditions preventing full weight-bearing standing during evaluation
* Active infection, hematologic disease, or rheumatologic disease at the time of assessment

Where it's running

  • IRCCS Rizzoli Orthopedic Institute
    Bologna, Bologna, Italy
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.