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Tendon bone healing can be enhanced by demineralized bone matrix: a functional and histological study
Siva Sundar1, Catherine J Pendegrass, Gordon W Blunn
1Centre for Biomedical Engineering, Institute of Orthopaedics and Musculoskeletal Science, University College London, Brockley Hill, Stanmore, Middlesex, UK.
Summary
Demineralized bone matrix (DBM) significantly improved tendon-bone healing in a sheep model, reducing repair failure rates. This suggests DBM could enhance rotator cuff repair outcomes.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Regenerative Medicine
Background:
- Rotator cuff repair surgeries often fail due to challenges in tendon reattachment to bone.
- Augmentation strategies are explored to improve the tendon-bone healing interface integrity.
Purpose of the Study:
- To investigate the efficacy of demineralized bone matrix (DBM) in enhancing tendon-bone healing.
- To evaluate if DBM augmentation improves functional recovery and enthesis morphology compared to controls.
Main Methods:
- An ovine patellar tendon model was used, detaching and reattaching the tendon to an osteotomized bone bed.
- Two groups were studied: a control group (no augmentation) and a DBM group (DBM interposed between tendon and bone).
- Functional weight-bearing, mechanical testing, and histomorphometric analysis were performed at 12 weeks.
Main Results:
- Tendon repair failure rates were 33% in the control group versus 0% in the DBM group.
- DBM augmentation led to significantly improved functional weight-bearing capacity.
- Histomorphometric analysis revealed increased amounts of fibrocartilage and mineralized fibrocartilage in the DBM group.
Conclusions:
- Demineralized bone matrix (DBM) effectively enhances tendon-bone healing in an ovine model.
- DBM augmentation shows potential in reducing the high clinical failure rates of rotator cuff repairs.
