ABSTRACT
Study included 20 patients with instable burst fractures presented in Accident and Emergency Department, Shaikh Zayed Hospital, Lahore. Twelve patients were male and eight patients were female. Age ranges from 15 to 29 years. Ten patients were without neurological loss, five were partial neurological involvement and 5 were complete neurological cases. All these patients were operated and stabilized with posterior interpedicular system called fixator internae developed by AO. This instruments allows stable fixation limited only two adjacent spinal segments. With fixator internae it is possible to add distraction or compression to the involved segments. It is able to reduce effectively the middle column by ligamentotaxis. All patients in this series had a minimum follow up of one year. Most patients in this series had a near anatomical reduction of all three columns in the involved segments. It was also possible to reestablished the normal Lordosis of the lumbar spine. AO International Classification of thoracolumbar fractures were followed. 10 patients without neurological loss were mobile after 2 weeks. Five patients with partial neurological loss recovered fully and 3 patients complete neurological loss, one patient recovered partially and but 2 patients remained paraplegic and bed ridden. Results were satisfactory and cost effective