Objective. To introduce a new spinal internal fixation system

Texas Scottish Rite Hospital （TSRH）

and to investigate its early clinical outcomes.Methods. The preliminary clinical outcomes of 15 patients with thoracolumbar or lumbar scoliosis treated by anterior spinal fusion with TSRH instrumentation were studied retrospectively. Fourteen patients were diagnosed as idiopathic scoliosis and 1 as neuromuscular scoliosis.Results. Preoperatively

the Cobb’s angle on the coronal plane was 55. 8° （range 35° - 78°）

and 14° postoperatively

with an average correction of 74. 8 %. The average unfused thoracical curve was 35. 9 ° preoperatively （range 26° - 51°） and 21. 8° （10°-42° ） postoperatively

with 40% correction. The sagittal curve of lumbar was kept physiologically

preoperative 27. 9° and postoperative 25. 7° respectively. The trunk shift was 13.4 mm （5 - 28mm） preoperatively and 3. 5 mm （0-7 mm） postoperatively. The averaged apic vertebra derivation was 47. 8 mm （21 - 69 mm） before operation and 10. 8 mm （3-20 mm） after operation. The distance of C7 to center sacrum vertical line （CSVL） was 19. 5 mm（16 - 42）preoperatively and 11. 3 mm （0-32 mm） postoperatively. The apical vertebra rotation was 3 degree in 15 patients preoperatively

and were improved to normal in 10 patients

1 degree in 4 patients

and 2 degree in 1 patients postoperatively. None had neurological injury and infection. Only 1 patient complained a cool feeling in the low extremity of concave side

and the symptom vanished at 3-month followed up.Conclusion. If used appropriately

TSRH anterior spinal system is a good treatment for low thoracic or thoracic lumbar scoliosis.