title: Radiographic joint space in normal acromioclavicular joints.
abstract: The acromioclavicular joint space in standard antero-posterior images of 151 normal subjects was measured. The joint space was significantly wider in men. There was a highly significant reduction of the joint space with age in both men and women and in persons past 60 a joint space of 0.5 mm or less is not pathological. A joint space wider than 7 mm in men and 6 mm in women is abnormal. The measuring technique described is useful in population studies. In individual cases a simple measurement with a ruler serves the same purpose.
mesh_terms: D000173:Acromioclavicular Joint / Q000000981:diagnostic imaging* / Q000473:pathology; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000375:Aging; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012598:Sclerosis; D012737:Sex Factors