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The single-row Mason-Allen technique is a surgical method used in rotator cuff repair. It focuses on creating strong sutures to reattach the torn rotator cuff tendon to the bone. Here's a breakdown of this procedure: --- What is the Mason-Allen Stitch? The Mason-Allen stitch is a specialized suture technique designed for strong tissue fixation, reducing the risk of suture pull-through. It uses a combination of: 1. Horizontal Mattress Stitch: Provides broad contact between the tendon and bone. 2. Vertical Stitch: Ensures deep penetration into the tendon for additional strength. --- Single-Row Mason-Allen Rotator Cuff Repair In a single-row repair, the sutures are anchored in a single line of anchors placed along the tendon footprint on the humeral head. This is in contrast to double-row or transosseous-equivalent repairs, which use more anchors and layers of fixation. Procedure: 1. Preparation: The torn rotator cuff tendon and its insertion site on the humeral head are debrided (cleaned). Bone preparation creates a healing environment (microfractures may be created to stimulate blood supply). 2. Anchor Placement: Anchors (metallic or bioabsorbable) are placed in the bone along the footprint of the torn rotator cuff tendon. 3. Mason-Allen Suturing: Sutures from the anchor are passed through the tendon using the Mason-Allen technique. This provides excellent tendon-bone contact and reduces suture pull-through due to its combination of horizontal and vertical stitches. 4. Tendon Fixation: The tendon is pulled back to its anatomical position and securely tied down to the bone using the Mason-Allen stitches. --- Advantages of Single-Row Mason-Allen Repair Simplicity: Single-row repairs are technically easier and faster compared to double-row techniques. Strength: The Mason-Allen stitch enhances the security of the repair, especially in tendons with poor quality or thin edges. Biomechanics: It provides good initial fixation strength, crucial for early healing. --- Limitations Contact Area: Single-row techniques may provide less tendon-to-bone contact compared to double-row repairs, potentially leading to less robust healing. Gap Formation: In cases of large tears or poor tendon quality, single-row repair might not adequately cover the footprint. Tear Size: Single-row Mason-Allen repair is more suitable for small to medium tears. --- Rehabilitation Rehabilitation after single-row Mason-Allen repair typically involves: 1. Immobilization: A sling is used for 4–6 weeks to protect the repair. 2. Passive Range of Motion (ROM): Early passive ROM exercises start at 2–4 weeks post-surgery. 3. Active ROM and Strengthening: Gradual strengthening and active movements begin around 6–8 weeks. 4. Full Recovery: Full return to activities may take 4–6 months. --- Conclusion The single-row Mason-Allen repair is an effective and strong technique for small to medium rotator cuff tears. While it may not provide as much tendon-to-bone contact as double-row techniques, its simplicity, combined with the robust Mason-Allen sutures, makes it a valuable approach in certain clinical scenarios. Proper surgical technique and rehabilitation are essential for optimal outcomes.