Gerber (1994) systematically tested suture materials, tendon-grasping techniques, and bone fixation methods used in rotator cuff repair. The study used 159 sheep infraspinatus tendons and 18 osteoporotic cadaveric humeral heads to identify which constructs were mechanically adequate under physiologic loads. Practice at the time was surveyed from 30 expert shoulder surgeons to benchmark against these biomechanical findings.
In 1994, the simple stitch was the dominant repair technique among expert shoulder surgeons — and this paper showed it was the weakest construct tested, failing at loads well within the early postoperative range.
When you repair a large or retracted cuff tear, use a locking suture configuration. The modified Mason-Allen (or equivalent locking construct) is the only technique proven to survive repetitive physiologic loading without slippage. Simple stitches are appropriate only for small tears repaired without tension and fully protected during early healing.
When operating on an elderly patient with osteoporotic bone, recognize that suture anchors and transosseous fixation perform equivalently poorly. All fail around 140 N. Bone-side augmentation is the mechanistic solution; this paper is the origin of that principle, even though specific augmentation devices have since evolved.
Choose braided polyester (Ethibond, Mersilene) as your suture material. PDS II creates a 10 mm gap at 200 N. A gap the repair will never heal across. This finding is why monofilament absorbable sutures fell out of favor for rotator cuff repair despite adequate tensile strength on paper.
Gerber (1994) systematically tested suture materials, tendon-grasping techniques, and bone fixation methods used in rotator cuff repair. The study used 159 sheep infraspinatus tendons and 18 osteoporotic cadaveric humeral heads to identify which constructs were mechanically adequate under physiologic loads. Practice at the time was surveyed from 30 expert shoulder surgeons to benchmark against these biomechanical findings.
In 1994, the simple stitch was the dominant repair technique among expert shoulder surgeons — and this paper showed it was the weakest construct tested, failing at loads well within the early postoperative range.
When you repair a large or retracted cuff tear, use a locking suture configuration. The modified Mason-Allen (or equivalent locking construct) is the only technique proven to survive repetitive physiologic loading without slippage. Simple stitches are appropriate only for small tears repaired without tension and fully protected during early healing.
When operating on an elderly patient with osteoporotic bone, recognize that suture anchors and transosseous fixation perform equivalently poorly. All fail around 140 N. Bone-side augmentation is the mechanistic solution; this paper is the origin of that principle, even though specific augmentation devices have since evolved.
Choose braided polyester (Ethibond, Mersilene) as your suture material. PDS II creates a 10 mm gap at 200 N. A gap the repair will never heal across. This finding is why monofilament absorbable sutures fell out of favor for rotator cuff repair despite adequate tensile strength on paper.