Experimental study on the grouped individual guide template assisted C2 transoral pedicle placement
ZHU Mei-song, PENG Peng, ZHOU Xiao-qi, SU Ze-xin, LI Si-jing,LI Jian-yi, LIN Li-jun
Chinese Journal of Clinical Anatomy ›› 2018, Vol. 36 ›› Issue (6) : 669-673.
Experimental study on the grouped individual guide template assisted C2 transoral pedicle placement
Objective Using of 3D reconstruction, computer aided design and rapid prototyping(RP)technology to design and manufacture a novel grouped individual guide template for assisting C2 transoral pedicle placement. Methods After CT scanning of 4 adult cadaveric cervical specimens, 3D reconstruction models of upper cervical vertebrae were obtained by Mimics. Then 3D models of C1, C2 and the TARP were imported into Solidworks 2014 to design a grouped individual guide template for AAD. With the technology of rapid prototyping, the grouped individual guide template for AAD was manufactured. The templates were used for C2 transoral pedicle placement in cadavers. Subsequently, CT scan was performed to evaluate the screw position. Results All 8 K-wires were inserted into the cervical pedicles. The absolute deviations were (0.85±0.70) mm in axial plane and (0.88±0.53) mm in sagittal plane. No significant differences of the absolute deviations was observed on both the axial and sagittal planes（P>0.05）. In the classification of screw position, 7 screws position were in Type I, and 1 screw was in Type II. Conclusion C2 transoral pedicle placement assisted by the grouped individual guide template is highly accurate and simple. It is a new alternative to C2 transoral pedicle placement.
Transoral atlantoaxial reduction plate / Atlantoaxial dislocation / Individual guide templates / C2 transoral pedicle placement
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