Hip joint dislocation of traumatic origin in children is rare. When this joint is subjected to undue strain, fracture is the rule in childhood.
Maffei1 found only forty-nine cases reported in the literature, to which he added three from a series of 1,842 luxations occurring over a period of twenty-one years at the Rizzoli Institute of Bologna. Maffei noted that the posterior luxation was most common, posterior iliac luxation occurring in thirty-three and posterior ischiatic in six cases. Of the anterior, two were suprapubic, one was iliopectoral, and six were obturator. In one case, the type was not given. Thirty-seven occurred in males, and eleven in females. The left hip was injured in twenty-two cases, and the right in seventeen.
Of Maffei's own cases, two were posterior iliac of the left leg, and one anterior suprapubic of the right leg. All were operatively reduced, and were cured. Of the