Design of cervical pedicle locator and three-dimensional location of cervical pedicle.

Study Design: To develop a high-accuracy, easy-manipulated, and low-cost cervical pedicle three-dimensional locator for guiding cervical pedicle screw placement.

Objectives: To improve the safety of cervical pedicle screw insertion, simplify its manipulation, and offer safety guarantees in clinical application.

Summary Of Background Data: Because of the complicacy of the anatomic structure of cervical pedicle, clinical application of cervical pedicle screw remained hard to popularize.