Design and clinical application of Scofix instrumentation (fixation apparatus for scoliosis) / 中华骨科杂志

ABSTRACT

Objective To Introduce the principle, structure and observe the effects of clinical application of Scofix instrumentation. Methods Scofix instrumentation consists of different size of open up pedicle screws, open up pedicle hooks, connecting rods, blockers and devices of transverse connection. The open up pedicle screws can be inserted continuously or intermittently, fixed by the connecting rods in the scoliotic segments, and then distraction, compression and derotation manipulation can be performed to correct the spinal deformity. Thirty three patients were treated with this methods. The average age at surgery was 14.4 years. The mean preoperative Cobb angle in idiopathic and congenital scoliosis was 70 and 68 degrees,respectively. According to the degree of deformity and spinal flexibility, the correction was done at one setting or in stages. Results Postoperative Cobb angle and the corrective rate in 19 cases of idiopathic scoliosis were 29.4?and 59.1%, respectively while in 14 cases of congenital scoliosis the figures were 33.3?and 52.3%, respectively. No severe complications occurred. Conclusion Scofix instrumentation which is designed by the principle of CD instrumentation and in conformity with the spinal structural features of Chinese adolescence has the function of distraction, compression and derotation and can be used for internal fixation of scoliosis in different ages. Because of the high risk and the great difficulty, the thoracic pedicel screws should be used carefully, and can be replaced by pedicle hooks if necessary.