A rotator cuff rupture produces permanent osteoporosis in the affected extremity, but not in those with whom shoulder function has returned to normal

Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research
P KannusM Järvinen

Abstract

Areal bone mineral density (BMD) and clinical status of 34 men treated surgically 9 years earlier for a rotator cuff rupture of the dominant side shoulder were determined. The BMD was measured at the lumbar spine (L2-L4) and the proximal humerus, humeral shaft, radial shaft, ulnar shaft, distal forearm, and hand of both extremities using a dual-energy X-ray absorptiometric (DXA) scanner. Thirty-four age-, height-, weight-, and profession-matched normal men (controls) were also measured. The patients' mean side-to-side BMD difference (dominant minus nondominant/nondominant x 100%) was significantly lower in the proximal humerus (patients -3.5% vs. controls +2.4%, p = 0.0002), humeral shaft (-2.6% vs. +1.6%, p = 0.0005), radial shaft (-0.4% vs. +1.9%, p = 0.0311), distal forearm (-0.2% vs. +2.4%, p = 0.0158), and hand (+2.3% vs. +4.0%, p = 0.0047). In the ulnar shaft, this difference was almost the same in the patients (-0.2%) and controls (+0.2%) (NS). Also, the lumbar spine BMD did not differ significantly between these groups (mean +/- SD = 1.098 +/- 0.148 g/cm2 in patients vs. 1.066 +/- 0.156 g/cm2 in controls). In patients, the relative BMDs of the injured extremity did not significantly associate with the size of the ruptur...Continue Reading

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