Experimental study on individual guide templates produced by CNC machine tool technology assisted pedicle screws insertion in the lower cervical spines
Chinese Journal of Clinical Anatomy ›› 2015, Vol. 33 ›› Issue (3) : 284-287.
Experimental study on individual guide templates produced by CNC machine tool technology assisted pedicle screws insertion in the lower cervical spines
Objective Using of computer aided design and CNC machine tool technology for individual guide templates of lower cervical pedicle screws provides a new method for processing. Methods According to pre-operative CT scan data, 3D reconstruction models of lower cervical vertebra were obtained by Mimics; a based on the 3D model, the individual guide templates were designed and were subsequently produced by a CNC machine. The templates were used for lower cervical vertebrae screw placement in cadavers. Subsequently, CT scan was performed to evaluate the screw position. Results All 10 K-wires were inserted into the cervical pedicles. The absolute deviations were (0.44±0.23) mm in axial plane and (0.37±0.20) mm in sagittal plane. In the simulated insertion, 9 screws position were in grade 1, 1 screw was in grade 2. Conclusion Pedicle screws placement assisted by individual guide templates is highly accurate and simple. It is a new alternative to lower cervical pedicle.
[1] Gaines RJ. The use of pedicle-screw internal fixation for the operative treatment of spinal disorders[J]. J Bone Joint Surg Am, 2000, 82(10):1458-1476.
[2] Neo M, Sakamoto T, Fujibayashi S, et al. The clinical risk of vertebral artery injury from cervical pedicle screws inserted in degenerative vertebrae[J]. Spine, 2005, 30(24):2800-2805.
[3] Lu S, Xu Y Q, Chen GP, et al. Efficacy and accuracy of a novel rapid prototyping drill template for cervical pedicle screw placement[J]. Comput Aided Surg, 2011, 16(5):240-248.
[4] Ma T, Xu YQ, Cheng YB, et al. A novel computer-assisted drill guide template for thoracic pedicle screw placement: a cadaveric study[J]. Arch Orthop Trauma Surg, 2012, 132(1):65-72.
[5] Ferrari V, Parchi P, Condino S, et al. An optimal design for patient-specific templates for pedicle spine screws placement[J]. Int J Med Robot, 2013, 9(3):298-304.
[6] Lu S, Xu Y Q, Lu WW, et al. A novel patient-specific navigational template for cervical pedicle screw placement[J]. Spine, 2009, 34(26):E959-E966.
[7] Ryken TC, Owen BD, Christensen GE, et al. Image-based drill templates for cervical pedicle screw placement[J]. J Neurosurg Spine, 2009, 10(1):21-26.
[8] Fu M, Lin L, Kong X, et al. Construction and accuracy assessment of patient-specific biocompatible drill template for cervical anterior transpedicular screw (ATPS) insertion: an in vitro study[J]. PLoS One, 2013, 8(1):e53580.
[9] Abumi K, Kaneda K. Pedicle screw fixation for nontraumatic lesions of the cervical spine[J]. Spine, 1997, 22(16):1853-1863.
[10]Kunz M, Rudan JF, Xenoyannis GL, et al. Computer-assisted hip resurfacing using individualized drill templates[J]. J Arthroplasty, 2010, 25(4):600-606.
[11] 覃炜，权正学，刘洋，等. 寰枢椎椎弓根螺钉个体化导向模板的研制与实验研究[J]. 中国修复重建外科杂志, 2010, 24(10):1168-1173.
[12] 段冶. 数控机床技术发展现状及趋势初探[J]. 科技创新与应用, 2014, (1):120.
[13] 刘大炜，汤立民. 国产高档数控机床的发展现状及展望[J]. 航空制造技术, 2014, (3):40-43.
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