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. 2010 Jan 5;468(6):1526–1533. doi: 10.1007/s11999-009-1188-9

Fig. 1A–B.

Fig. 1A–B

(A) Superior migration of the humerus associated with rotator cuff failure results in loss of deltoid tension; contraction of the deltoid produces superior translation of the humeral head rather than humeral elevation. (This figure was published in Gartsman GM, Edwards TB. Shoulder Arthroplasty. Philadelphia, PA: ©Saunders; 2008:219–221.) (B) The reverse prosthesis restores deltoid tension and creates an appropriate fulcrum for the deltoid to produce humeral elevation. (This figure was published in Gartsman GM, Edwards TB. Shoulder Arthroplasty. Philadelphia, PA: ©Saunders; 2008:219–221.)