Using AttraX Putty to reduce pain in knee osteotomy

A Randomized Controlled Trial of AttraX® Putty vs. Conventional Open-wedge Osteotomy Without Gap Filler in Open-wedge Osteotomy

Not applicable Interventional UMC Utrecht · NCT05992038

This study is testing if using AttraX Putty during knee surgery can help reduce pain after the operation for people with knee osteoarthritis.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment40 (estimated)
Ages18 Years and up
SexAll
SponsorUMC Utrecht Academic / other
Drugs / interventionsradiation
Locations1 site (Utrecht, Utrecht)
Trial IDNCT05992038 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the use of AttraX® Putty as a gap filler in open-wedge osteotomies for patients with unicompartmental knee osteoarthritis. The study aims to determine if filling the osteotomy gap with this synthetic ceramic reduces early postoperative pain compared to conventional osteotomy without the filler. Secondary objectives include assessing rehabilitation speed, local blood loss, bone union, surgical accuracy, and adverse events. The trial is single-blinded and involves a randomized controlled design.

Who should consider this trial

Good fit: Ideal candidates are individuals indicated for open-wedge osteotomy due to unicompartmental osteoarthritis of the knee.

Not a fit: Patients requiring osteotomy for cartilage treatment or other knee surgeries, or those with significant corrections above 10 mm, may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could significantly reduce postoperative pain and improve recovery for patients undergoing knee osteotomy.

How similar studies have performed: Previous studies have shown promising results with similar synthetic bone fillers, suggesting potential for success in this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* indication for an open-wedge osteotomy of the femur, tibia or double level due to unicompartmental osteoarthritis (OA).
* Comply with all aspects of the treatment, including CT scans, radiographs and 1-year follow-up
* Informed consent

Exclusion Criteria:

* Osteotomy for indication of cartilage treatment or other knee surgeries than unicompartmental OA
* Correction using an open wedge above 10 mm
* Pregnant women at time of enrollment or women who are planning to become pregnant during the duration of the study

Where this trial is running

Utrecht, Utrecht

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Osteo Arthritis KneeOsteotomyGap fillerPostoperative painRandomized controlled trialAttraX Putty
Last reviewed 2026-06-09 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.