Abstract
ABSTRACT
Objective
Previous studies have been constrained by a single ideal entry point and a narrow bony corridor, leaving a limited selection of entry points for infra‐acetabular screws and resulting in suboptimal surgical efficiency. This study aims to analyze the morphology of the infra‐acetabular screw entry zone and evaluate a central entry point zone for optimizing surgical screw placement.
Methods
3D pelvic models from 100 patients were reconstructed. The entry zone was morphologically analyzed, and its similarity to a standard ellipse was calculated. A clinical comparison was conducted on 20 patients with acetabular fractures, comparing the central entry point technique against the ideal entry point method.
Results
The entry zone exhibited a quasi‐elliptical shape. The central entry point was consistently located medial and anterior to the ideal entry point. Clinically, the central entry point group demonstrated significantly shorter operative time and fewer x‐ray exposures, while screw length and success rate showed no significant difference.
Conclusion
The infra‐acetabular screw entry zone is an elliptical structure. Using the central entry point significantly improves placement efficiency and reduces radiation exposure, offering considerable clinical value.