A novel patient-specific navigational template for cervical pedicle screw placement.

摘要: STUDY DESIGN.: Prospective trial. OBJECTIVE.: To develop and validate a novel, patient-specific navigational template for cervical pedicle placement. SUMMARY OF BACKGROUND DATA.: Owing to the narrow bony anatomy proximity vertebral artery spinal cord, instrumentation procedures demand need precise technique screw PATIENT.: Specific drill with preplanned trajectory has been thought as promising solution METHODS.: Patients pathology (n = 25) requiring were recruited. Volumetric CT scan was performed on each desired vertebra 3-dimensional reconstruction model generated from data. Using reverse engineering technique, optimal size orientation determined designed surface that is inverse of posterior surface. The its corresponding manufactured using rapid prototyping tested violations. sterilized used intraoperatively assist placement screws. In total, 88 screws inserted into levels C2-C7 2 6 in patient. After surgery, positions evaluated graded validation. RESULTS.: This method showed ability customize based unique morphology vertebra. all cases, it relatively very easy manually place lamina body during surgery. required time between fixation insertion about 80 seconds. Of screws, 71 had no deviation 14 <2 mm, 1 4 mm there misplacements. Fluoroscopy only once every patient after CONCLUSION.: authors have developed novel good applicability high accuracy. significantly reduces operation radiation exposure members surgical team. potential use such insert promising. clinically validated provide an accurate spine.