A kind of accurate, simple and efficient CAD technology is provided to the program for pedicle nailing channel,which is of great significance in further reducing the risk of pedicle screw internal fixation surgery and improving the response speed of the surgery. Least square theory is used to get secondary correction of the nail＇s direction; built-in function of CAD software is used to realize three correction of nailing point location; based the safety zone which is framed by the isometric oval, a technical route is put forward to get more se...
