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6-8mm
6%
180/2953
14-16mm
72%
2122/2953
20-22mm
16%
472/2953
24-26mm
5%
140/2953
30-32mm
1%
26/2953
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Cadaveric studies have shown the average medial-to-lateral distance of the supraspinatus tendon footprint on the greater tuberosity is 14-16mm. Curtis et al dissected 20 fresh-frozen cadavers in order to identify the length and width of each rotator cuff muscle insertion on the humerus. They found that the average maximum insertional length (anterior to posterior distance, distance Y in Illustration A) and width (medial to lateral distance, distance X in Illustration A) of the supraspinatus insertion was 23 x 16mm respectively. Dugas et al dissected 20 cadaveric specimens to determine an accurate and reproducible method of measuring the area and dimensions of the rotator cuff tendon insertions and their distance from the articular surface. They found that the mean minimum medial-to-lateral distance across the rotator cuff insertion occurred at the mid-portion of the supraspinatous, and measured 14.7mm. They also determined that area of insertion of the 3 tendons on the greater tuberosity averaged 6.24 cm2, and that the rotator cuff inserts very closely to the articular margin along the anterior 2.1cm of the greater tuberosity.
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