Introduction: Ventral dynamic correction of scoliosis is a modern surgical technique that stabilizes the spine while preserving segmental mobility. However, the procedure is complicated by vertebral deformation and torsion, which increases the risk of implant malposition. The use of additive manufacturing technologies, such as 3D models and surgical guide templates, helps to optimize preoperative planning and improve the accuracy of screw placement, thereby minimizing intraoperative risks.

Materials and Methods: The study included 96 patients with idiopathic scoliosis, divided into three comparable groups based on sex, age, and body mass index (BMI). Group I (30 patients) underwent standard planning using radiography, MSCT, and MRI. Group II (34 patients) additionally utilized 3D-printed spine models with pre-planned Kirschner wire trajectories. Group III (32 patients) was operated using customized guide templates, which were sterilized using gas sterilization. The screw insertion time, positioning accuracy, and complications were evaluated.

Results Positioning Accuracy: Group I: Correct positioning (types A and N) was achieved in 81.6% of cases (385/472), with deviations in 18.6%; Group II: The rate of correct positions increased to 98.9% (515/521), with deviations of only 1.15% (Type B only); Group III: All screws (100%, 503/503) were positioned correctly.

The time required to install a single screw was reduced from 3.7 ± 0.6 minutes in Group I to 1.9 ± 0.2 minutes in Group III. Classification criteria: Types: A (correct), B (perforation <2 mm), C (2-4 mm), D (>4 mm); Prefixes: "+" (medial/lateral breach >2 mm), "-" (perforation), N (perforation ≤2 mm).

Conclusions: The application of 3D-printed spine models and customized guide templates for preoperative planning and intraoperative support significantly enhances the safety and efficiency of ventral dynamic correction for scoliosis, establishing them as vital tools in the surgical treatment of spinal deformities.