ABSTRACT
Abstract:The present case report retrospectively analyzed 36 cases of injury to posterior pelvic dng who received treatment in the Department of Orthopedics,Yan'an Hospital between January 2004 and April 2007. According to the Denis classification,there were 20 cases of type I injury to posterior pelvic ring,12 of type Ⅰ,and 4 of Ⅲtype Ⅲ; according to Tile classification,there were 16 cases of B3,10 of C1,6 of C2,and 4 of C3. Pedicle screw fixation system was employed. Two curvy incisions were made on the bilateral posterior superior lilac spine and a hole was chiseled on each side to fit the pedicle screw. Then,a universal pedicle screw was driven between the inner and outer lilac plates until the screw were sunk. A rod was finally traversed through erector spinae to connect two pedicle screws. Thirty cases were available at follow-up with a mean of 11 months (range:6-11 months). None of 30 cases presented with nerve or vessel injury and breakage,loosening of screws,or redislocation of sacroiliac joints. According to functional rating scale,excellent results were found in 15 cases,good in 13,and fair in 2 cases. These findings suggest that treatment for injury to posterior pelvic ring with pedicle screw fixation system is simple and reliable with microtrauma and little bleeding; in addition,it affords good recovery and can be employed in primary hospital without monitoring of X-ray,so it will deserve popular practice.