Abstract:

BACKGROUND: Hemivertebra malformation is the most common cause of congenital kyphoscoliosis. Hemivertebra resection can directly remove teratogenic factors, which is an ideal treatment method.                         
OBJECTIVE: To observe the Cobb angle changes before and after posterior hemivertebra resection and pedicle screw internal fixation for the treatment of hemivertebra malformation so as to evaluate the treatment effect on kyphoscoliosis malformation.
METHODS: Eleven adolescent patients with kyphoscoliosis malformation caused by single hemivertebra selected from the Department of Orthopaedics, the Second People’s Hospital of Wuxi between 2008 and 2011 were treated with posterior hemivertebral resection and pedicle screw internal fixation.
RESULTS AND CONCLUTION: During 1-2 years follow-up, posterior-anterior and lateral X-ray images showed that coronal planes Cobb angle in standing position was (49.2±12.8)° before treatment and corrected to (16.5±5.8)° after repairment (average correction rate of 66.5%); sagittal planes Cobb angle was (35.7±6.2)° before treatment and corrected to (14.1±1.9)° (average correction rate of 60.5%). At the final follow-up, the coronal planes Cobb angle was (19.0±5.8)° , and lost 2.8° and sagittal planes Cobb angle was (14.1±1.9)° without significant loss. During the follow-up, no complications of neurological damage, infection and implant failure occurred. It is indicated that the effect of posterior hemivertebra resection and pedicle screw internal fixation for the treatment of kyphoscoliosis malformation caused by hemivertebra malformation is satisfactory with a lower loss probability and successful fusion.