This controlled cadaveric study measured contact area and contact pressure at the tendon-bone interface after rotator cuff repair. Using pressure-sensitive film in 10 shoulders, it compared transosseous, single-row, and double-row suture anchor techniques. The question: which repair best restores the supraspinatus footprint and may favor healing?
When you are choosing a repair construct, this paper gives the biomechanical case for double-row fixation: it restores the largest tendon-bone footprint, and footprint restoration is thought to favor healing. The mental model is straightforward. Single-row concentrates high pressure over a small area with a dead zone between anchors. Double-row spreads high pressure across a broad footprint.
Remember this is a static cadaveric model with no cyclic loading and no biology. It shows contact mechanics, not healing or clinical re-tear rates, which later clinical trials would test directly.
One practical pearl the authors stress: place anchors off the articular cartilage, because pressure with anchor techniques clusters around the implant. Also note the authors could not define an optimal pressure. Too little may let the tendon separate, too much may impair blood flow.
This controlled cadaveric study measured contact area and contact pressure at the tendon-bone interface after rotator cuff repair. Using pressure-sensitive film in 10 shoulders, it compared transosseous, single-row, and double-row suture anchor techniques. The question: which repair best restores the supraspinatus footprint and may favor healing?
When you are choosing a repair construct, this paper gives the biomechanical case for double-row fixation: it restores the largest tendon-bone footprint, and footprint restoration is thought to favor healing. The mental model is straightforward. Single-row concentrates high pressure over a small area with a dead zone between anchors. Double-row spreads high pressure across a broad footprint.
Remember this is a static cadaveric model with no cyclic loading and no biology. It shows contact mechanics, not healing or clinical re-tear rates, which later clinical trials would test directly.
One practical pearl the authors stress: place anchors off the articular cartilage, because pressure with anchor techniques clusters around the implant. Also note the authors could not define an optimal pressure. Too little may let the tendon separate, too much may impair blood flow.