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| HUANG Xuan,LI Fengning,ZHANG Fan.A cadaveric study on establishing individualized navigation templates for axis laminar screw insertion by using a three-dimensional printing forming technique[J].Chinese Journal of Spine and Spinal Cord,2014,(4):366-371. |
| A cadaveric study on establishing individualized navigation templates for axis laminar screw insertion by using a three-dimensional printing forming technique |
| Received:January 26, 2014 Revised:February 24, 2014 |
| English Keywords:Laminar screw Individualized navigation templates Three-dimensional printing Stereo lithography apparatus Fused deposition modeling Polylactic acid |
| Fund:国家自然科学基金资助项目（编号：81372012）；长海医院“1255”学科建设计划资助项目（编号：CH125540200，CH125520900） |
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| English Abstract: |
| 【Abstract】 Objectives: To investigate the feasibility of establishing individualized navigation templates for axis laminar screw insertion by using a three-dimensional printing forming technique, and to evaluate the accuracy of template-assisted laminar screw insertion. Methods: Nineteen adult cervical specimens were selected to take CT-scan. After original Dicom data were imported into the Mimics software, the axis model was established to generate the cavity model based on a three-dimensional printing forming technique. After using a free-hand procedure to create a navigation template with a well-established laminar screw path, bilateral laminar screws were inserted assisted by the navigation templates. CT-scan was taken postoperatively to access the position of the screws. Results: Establishing axis and the related cavity models based on CT-scan images proved to be a feasible and precise method. Thirty-eight laminar screws were implanted assisted by 19 navigation templates. CT-scan images indicated all the screws were completely contained within the laminae. No screw perforated laminar walls or transverse foramen. Conclusions: Axis laminar screw insertion assisted by a three-dimensional printing model is highly accurate and simple which can be a new alternative to conventional technique. |
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