제5요추-제 1 천추간 외상성 전측방 탈구 - 1례 보고 -

Among the various injuries of spine, dislocation of L5-S1 is very rare, because this kind of injury is caused by rare and specific mechanism, probably. About twenty cases of lumbosacral dislocation were reported in other countries. Only two cases of posterior dislocation and one case of anterior dislocation were reported in Korea. In spite of its rarity, it is very important that this kind of injury may be accompanied with considerable neurologic deficit. In August 1991, we experienced one case of traumatic anterolateral dislocation of L5-S1 , accompanied by paraparesis. Emergency manual reduction resulted in excellently reduced state radiologically, but initiai neurologic deficit improved minimally. Secondary open discectomy and posterior stabilization using Graf instrument were performed. After one year and 9 months' follow-up, the patient complains no low back pain, reveals no radioiogic instability. Most initial neurologic deficits improved greatly, however, mild steppage gait on left side due to weakened tibialis anterior power remained.