This ex vivo biomechanical study measured the 3-D supraspinatus footprint in 10 cadaveric shoulders. It compared how well four repair techniques restored that native insertion area. The four techniques were transosseous simple, transosseous mattress, suture-anchor simple, and suture-anchor mattress.
The core lesson: footprint restoration matters, and where you place your fixation determines how much of it you recover. Transosseous simple suture restored 85% of the native footprint because its distal bone tunnel lets the tendon edge lie laterally over the tuberosity. Suture anchors placed medially near the articular cartilage restored only about 67%.
The actionable pearl: if you use anchors, place them more laterally on the tuberosity to maximize tendon-bone contact area. Remember this is a time-zero cadaveric study in elderly specimens. It measures contact area, not healing or clinical outcomes, and the healing benefit of larger area is theorized rather than proven in vivo.
This work helped drive interest in footprint-restoring constructs, and its logic underlies the later development of double-row and transosseous-equivalent repairs.
This ex vivo biomechanical study measured the 3-D supraspinatus footprint in 10 cadaveric shoulders. It compared how well four repair techniques restored that native insertion area. The four techniques were transosseous simple, transosseous mattress, suture-anchor simple, and suture-anchor mattress.
The core lesson: footprint restoration matters, and where you place your fixation determines how much of it you recover. Transosseous simple suture restored 85% of the native footprint because its distal bone tunnel lets the tendon edge lie laterally over the tuberosity. Suture anchors placed medially near the articular cartilage restored only about 67%.
The actionable pearl: if you use anchors, place them more laterally on the tuberosity to maximize tendon-bone contact area. Remember this is a time-zero cadaveric study in elderly specimens. It measures contact area, not healing or clinical outcomes, and the healing benefit of larger area is theorized rather than proven in vivo.
This work helped drive interest in footprint-restoring constructs, and its logic underlies the later development of double-row and transosseous-equivalent repairs.