4.5 Article

The Effect of Coracoacromial Ligament Excision and Acromioplasty on Superior and Anterosuperior Glenohumeral Stability

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W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.arthro.2008.10.004

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Acromioplasty; Coracoacromial arch; Coracoacromial ligament; Shoulder; Subacromial decompression

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Purpose: To determine the effect of coracoacromial ligament (CAL) resection and subacromial decompression (SAD)/acromioplasty on humeral head translation under anterosuperior and Superior loading in a cadaveric model with an intact rotator Cuff. Methods: Six cadaveric shoulders were tested in the intact state, following CAL resection and following SAD. Results: Excision of the CAL led to a significant increase in anterosuperior humeral translation of 2.1 mm (17%). SAD led to a significant increase in superior humeral translation of 2.5 mm (29%). Conclusions: The results of this cadaveric study showed that resection of the CAL led to a 2.1-mm increase in anterosuperior translation and that SAD led to a 2.5-mm increase in superior translation. Clinical Relevance: CAL resection and SAD are common surgical procedures, which may lead to increases in anterosuperior and superior glenohumeral instability.

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