| 摘要 |
The present invention relates to a jig to be closely attached to the back surface of vertebra, which is produced by a 3D printer based on CT scan information to guide a perforation position and an entry angle of screw, and more specifically, to a technology which draws a direction of the back surface of vertebra, while the orientation of the spinous process is referred as a back surface in this paper, and an entry path of a proper screw with a 3D program such as CATIA, auto CAD, and the like, based on a three-dimensional structure of spine, which has been obtained by CT scan of a patient; and then produces a gripping body which is capable of being accurately attached to vertebra by having a form of an engraving of the back surface of spine, and a guiding unit for guiding a screw perforation position and an entry angle to allow the screw and vertebra to be easily fastened, using the 3D printer. The jig comprises: a pair of gripping bodies (100) which is in the form of an engraving of a part of spinous process (201), lamina, and a rear part of both of articular processes based on the spinous process (201) of vertebra (200), so as to be accurately attached; a guide hole (101) which accommodates the screw (300) on the outer edge of the both of articular processes (202), so as to guide the screw to the direction of pedicle; and engaging portios (102, 203) which engage with a border area pertaining to the gripping bodies (100) or articular processes (202) on the inner wall or the convex portion formed on the spinous process (201). |
