Augmentation of tendon-to-bone healing

Area of Science:

• Orthopaedic Surgery
• Regenerative Medicine
• Biomaterials Science

Background:

• Tendon-to-bone healing is critical for successful surgical repair of injured tendons.
• The tendon-bone interface has limited regeneration capacity, posing challenges for functional and biological restoration.
• Current research focuses on overcoming these limitations to achieve native-like healing.

Purpose of the Study:

• To review and summarize current orthopaedic basic-science research strategies for augmenting tendon-to-bone healing.
• To explore the mechanisms and potential of various therapeutic approaches.
• To highlight the need for clinical translation and validation.

Main Methods:

• Review of existing literature on orthopaedic basic-science research.
• Categorization of strategies including growth factors, cell-based therapies, biomaterials, and physical modalities.
• Discussion of mechanical influences like loading and immobilization.

Main Results:

• Multiple strategies show promise, including osteoinductive factors, platelet-rich plasma, gene therapy, periosteal grafting, osteoconductive materials, cell therapies, scaffolds, and biomimetic patches.
• Physical modalities like low-intensity pulsed ultrasound and extracorporeal shockwave therapy may stimulate healing via mechanical forces.
• Fixation methods like coated sutures and interference screws can deliver biological factors and provide stability.

Conclusions:

• A diverse range of innovative strategies are being investigated to enhance tendon-to-bone healing.
• Understanding the biological and mechanical dynamics at the interface is key.
• Controlled Level-I human trials are essential to validate preclinical findings and translate them into clinical practice.