Arthroscopic Rotator Cuff Repair with Biphasic Interpositional Allograft Augmentation.

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Regenerative Medicine

Background:

• Rotator cuff repair is challenging with chronic tears or poor tissue quality, leading to high structural failure rates.
• Patients at increased risk of retear may benefit from enthesis augmentation.
• Existing methods may not adequately address the complex integration required at the rotator cuff enthesis.

Purpose of the Study:

• To describe a surgical technique for rotator cuff repair using a novel biphasic allograft.
• To evaluate the potential of this interpositional graft for enhancing soft-tissue and osseous integration.
• To improve stability and regeneration of the rotator cuff enthesis in patients with compromised tissue.

Main Methods:

• A transosseous-equivalent supraspinatus repair technique was employed.
• A novel biphasic allograft, combining demineralized cancellous matrix and mineralized bone, was utilized.
• The graft was placed as an interpositional layer to facilitate integration.

Main Results:

• The biphasic allograft demonstrated potential for promoting both soft-tissue and osseous integration.
• The graft design aims to enhance the stability of the rotator cuff enthesis.
• Regeneration of the transitional zone of the rotator cuff enthesis is a key intended outcome.

Conclusions:

• A transosseous-equivalent supraspinatus repair with a biphasic interpositional allograft is described.
• This technique offers a potential solution for challenging rotator cuff repairs with poor tissue quality.
• The biphasic allograft may improve outcomes by enhancing enthesis integration and stability.