This study was designed to determine which subscapularis repair method performs best under fatigue loading. Fresh-frozen human cadaveric shoulders were used. A standard circumferential release was performed, including a rotator interval release and separation of the subscapularis from the anterior and inferior capsules. One of 3 methods was used to repair the subscapularis tendon: tendon-to-tendon, tendon-to-bone, or bone-to-bone using a buttress plate. The shoulder was mounted on a fatigue-testing machine, and the medial end of the subscapularis tendon was attached to a soft-tissue clamp. We initially tested each specimen for fatigue at 150 N for 500 cycles, then at 300 N for 2500 cycles. The failure rate of bone-to-bone and tendon-to-tendon repairs was significantly better than that of the tendon-to-bone repair. The bone-to-bone repair exhibited the best combination of repair strength and restoration of subscapularis length.
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Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USARush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA
Brusalis, Christopher M.
Chan, Jimmy J.
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Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USARush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA
Chan, Jimmy J.
Jackson, Garrett R.
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Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USARush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA
Jackson, Garrett R.
Khan, Zeeshan A.
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Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USARush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA
Khan, Zeeshan A.
Kaplan, Daniel J.
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Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USARush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA
Kaplan, Daniel J.
Allahabadi, Sachin
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Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USARush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA
Allahabadi, Sachin
Verma, Nikhil N.
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Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA
Rush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, 1611 Harrison St, Chicago, IL 60612 USARush Univ, Dept Orthopaed Surg, Div Sports Med, Med Ctr, Chicago, IL USA