We report the results on 14 patients with idiopathic scoliosis treated by isolated anterior arthrodesis using TSRH instrumentation. The curves were 6 toracolumbar,5 lumbar and 3 double curves. The average vertebrae instrumented was 4.6. The caudalextension of the fusion reached to L2 in 1 case, L1 in 3 cases, L3 in 12 cases and L4 in 1 case. In the frontal plane the curve measured 49° preoperatively and corrected to 19° postoperatively at the end of follow up, 1° more than expected in bending roentgenograms. The upper uninstrumented curve improved from 30" preoperatively to 18° postoperatively, that is 9° less than expected in bending. The disbalance from C7 to the central sacral line and the disbalance of the center of the trunk was 0.8 cm and 0.5 cm and improved in both in 0.2 c. The apical vertebral rotation was 26° diminishing to 10° after surgery. In the sagital plane, lumbar lordosis changed from 53" to 46° postoperatively, being 4º due to the lumbar uninstrumented area. The tilt of the last instrumented vertebrae was 20" and after the procedure reduced to 9°. There were not any septic nor neurological complications and were not found any case of pseudoarthrosis nor instrumentation failure.

We report the results on 14 patients with idiopathic scoliosis treated by isolated anterior arthrodesis using TSRH instrumentation. The curves were 6 toracolumbar,5 lumbar and 3 double curves. The average vertebrae instrumented was 4.6. The caudalextension of the fusion reached to L2 in 1 case, L1 in 3 cases, L3 in 12 cases and L4 in 1 case. In the frontal plane the curve measured 49° preoperatively and corrected to 19° postoperatively at the end of follow up, 1° more than expected in bending roentgenograms. The upper uninstrumented curve improved from 30" preoperatively to 18° postoperatively, that is 9° less than expected in bending. The disbalance from C7 to the central sacral line and the disbalance of the center of the trunk was 0.8 cm and 0.5 cm and improved in both in 0.2 c. The apical vertebral rotation was 26° diminishing to 10° after surgery. In the sagital plane, lumbar lordosis changed from 53" to 46° postoperatively, being 4º due to the lumbar uninstrumented area. The tilt of the last instrumented vertebrae was 20" and after the procedure reduced to 9°. There were not any septic nor neurological complications and were not found any case of pseudoarthrosis nor instrumentation failure.