Sextant system fixation for the repair of lumbar fracture：ratio of anterior to posterior border height of the injured vertebra and kyphosis Cobb angle

Liu Cheng-jun; Gu Zu-chao; Zhang Yu

doi:10.3969/j.issn.2095-4344

Abstract：BACKGROUND:Posterior lumbar pedicle screw fixation has been a common method to treat vertebral compression fractures. Traditional surgical incision of pedicle screw fixation commonly produces many local muscle tissue damages. Lumbar fixation by minimaly invasive method is a big progress in minimaly invasive spine surgery. <br> OBJECTIVE:To investigate the therapeutic results of Sextant system with percutaneous pedicle screw fixation for the treatment of lumbar fracture, and to compare the changes in visual analog scale, the ratio of anterior to posterior border height of the injured vertebra, and kyphosis Cobb angle before and after fixation. <br> METHODS:Data of 58 cases of vertebral compression fractures were retrospectively analyzed. Al cases were treated by the senior associate chief physician (second author) at the Department of Orthopedics, the First People’s Hospital of Chengdu from January 2008 to December 2013. They received Sextant system with percutaneous pedicle screw fixation. Intraoperative blood loss, the changes in visual analog scale, the ratio of anterior to posterior border height of the injured vertebra, and kyphosis Cobb angle before and after fixation were observed. <br> RESULTS AND CONCLUSION: The average blood loss during the surgery was 40 mL, with an average post-surgery drainage of 80 mL. Postoperative lumbar back pain was significantly reduced (P < 0.01). After 2 weeks of lying in bed, they could do early functional rehabilitation exercises. The ratio of anterior to posterior border height of the injured vertebra, and kyphosis Cobb angle were significantly improved after fixation (P < 0.05). There was no screw loosening or breakage. These data suggested that the Sextant system with percutaneous pedicle screw fixation for vertebral compression fractures can better restore the anterior border height and correct kyphosis. Moreover, blood loss is less. Pain became mild after fixation, which is convenient to early functional exercises after the surgery.