OBJECTIVES: To analyze radiographic lateral decompensation of the trunk (trunk shift) in patients with adolescent idiopathic scoliosis who underwent selective fusion of primary thoracic curve in the three different techniques of hook, hybrid and screws. METHODS: Evaluation of anteroposterior radiographs retrospectively comparing the preoperative period, immediate postoperative and follow-up of at least one year in nine patients with hooks, 13 hybrid and 13 screws, and the measurement of trunk shift and Cobb angle between these three different instrumentation techniques. RESULTS: The averages in the preoperative period to the right lateral decompensation of the trunk was 16,7 mm for hooks, 13,2 mm for hybrids, 27,3 mm for screws. In the immediate postoperative period were -16 mm for hooks, -12,8 mm for hybrids, -10,7 mm for screws, with a correction in the one year follow-up of -9.6 mm for hooks, -11,8 for hybrids and -10,7 mm for screws occurring displacement of the trunk to the left. All cases using only pedicle screws showed trunk shift of less than 20 mm. We observed an imbalance in the group of hooks in one patient (11.11%) and of hybrids in two patients (15.38%). CONCLUSION: No significant differences in trunk lateral decompensation between the use of the three instrumentation techniques.
Scoliosis; Spinal fusion; Adolescent
