Fig. 1From: Is a patient-specific drill template via a cortical bone trajectory safe in cervical anterior transpedicular insertion?Two types of preoperative CBT designs. a CBT0 allows the screw thread to be close to the medial wall of cervical pedicle. b CBT0.7 allowed the screw thread to be 0.7 mm lateral from the medial wall of the cervical pedicleBack to article page