The Feasibility and Efficacy of Computer-assisted Screw Inserting Planning in the Surgical Treatment for Severe Spinal Deformity: a prospective study

Background: The objective of the study was to explore the feasibility and efficacy of computer-assisted screw inserting planning (CASIP) in the surgical treatment for severe spinal deformity Methods: : A total of 50 patients participated in this prospective cohort study. 25 patients were allocated into CASIP group and 25 patients were in Non-CASIP group. The demographic data, radiological spinal parameters were documented and analyzed. Each pedicle screw insertion was classified as satisfactory insertion or unsatisfactory insertion based on Gertzbein-Robbins classification. The primary outcome was the accuracy of pedicle screw placement. The secondary outcomes were the rate of puncturing screws, estimated blood loss, surgical time, correction rate and other radiological parameters. Results: : A total of 45 eligible patients completed the study, and 20 patients were in CASIP group and 25 patients were in Non- CASIP group. The accuracy of pedicle screws placement in CASIP Group and Non-CASIP Group were (92.0±5.5) % and (82.6±8.3) % (P<0.05), and the rate of puncturing screws were (0 (0-0)) % and (0 (0-6.25)) % (P<0.05). The median surgical time were 280.0 (IQR: 260.0-300.0) min and 310 (IQR: 267.5-390.0) min in two group and showed significant statistic difference (P<0.05). Conclusion: CASIP has good feasibility and can gain a more accurate and reliable instruments fixation, with which spine surgeons can make a detailed and personalized screw planning preoperatively to achieve satisfying screw placement.