Dislocation of the hip joint may be classified as congenital, acquired traumatic and acquired nontraumatic, which is also termed pathologic or spontaneous. From November, 1923, to May, 1928, 103 patients with congenital dislocations of the hip joint, six with traumatic and twenty-eight with spontaneous dislocations have been admitted to the University Hospital. Numerous articles have appeared in the literature concerning congenital and traumatic dislocations; however, comparatively little space has been given to the discussion of spontaneous dislocation of the hip joint, which is undoubtedly more frequent than traumatic dislocation, congenital dislocation being the most frequent type. The incidence of traumatic dislocation would obviously be greater in an industrial center; in general, it is not a common form of injury. Wilson and Cochran1 state that "traumatic dislocation of the hip joint is an uncommon accident and forms only about 2 per cent of all dislocations. Because the exposure to trauma
HART VL. SPONTANEOUS DISLOCATIONS OF THE HIP JOINT DURING EARLY LIFE: REPORT OF TWENTY-EIGHT CASES. Arch Surg. 1928;17(4):587–612. doi:10.1001/archsurg.1928.01140100057004
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