After establishing the three-dimensional model from computed tomography images, click Open to import the STP format of the precise surface document into three-dimensional modeling design software. Employ the Section View feature to examine the pedicles morphology in horizontal, sagittal, and coronal orientations. In the section view panel, adjust the angle of the section for optimal visualization.
Use Transparency Section Bodies to observe the narrowest point of the pedicles and record the angle parameters at Section 1 in the left panel. Adjust the angle of the vertebral model by clicking on the insert, features, move and copy function, and selecting the translate and rotate button. Return to the section view panel and adjust the view angle parameter in section one to zero.
Fine tune the displacement parameters in the section one panel to obtain a satisfactory pedicle section view. Reorient for an improved perspective to observe the pedicle section. Document the confirmed displacement parameters in the panel.
Use the move and copy function to manipulate the vertebral models position. Specify the displacement parameter in the left panel. Using the corner rectangle tool, encompass the entirety of the vertebral body.
Next, navigate to features, reference geometry plane, and designate the section view as the first reference. Modify the offset distance parameter to relocate the newly created plane to the anterior third of the vertebral body. Create a sketch on this plane and draw a point at the midpoint of the vertebral body signifying the termination point of the puncture.
Use the extruded cut function to cut the model. Designate the rectangular sketch generated as the selected contours. Adjust both the direction and depth to divide the vertebral body model into the vertebral body half and the lamini half.
Save the engineering files in S-L-D-P-R-T format. Open the file containing the vertebral body part. Then create a sketch based on the section plane.
Use the convert entity's function to convert the left pedicle projection into a curve sketch. Repeat the same for the right pedicle projection to acquire another curve sketch. Using the filled surface function, transform the curve sketches into surfaces with the left and right pedicle projection curve sketches serving as the boundary.
After concealing the vertebra, display the resulting surface. In the features panel. Select the lofted boss or base function.
Using the superior positioning of the left pedicle surface, designate the puncture endpoint as profiles to create a conical structure. Delineating the paths for pedicle puncture. Next, use the scale function to magnify the bilateral conical structure.
Setting the centroid as the scaling center point and applying a scale factor of two. Use the move and copy body function to individually relocate the conical structures. In the mate setting panel, select the apex of the structure and the puncture endpoint with the matching mode set as coincident.
Eliminate the vertebral body using the delete or keep body function. Save the biconical structure which compiles the bilateral pedicle puncture paths in S-L-D-P-R-T format. Use the insert part function to reassemble the lamini part and vertebral body part with the pedicle puncture set.
Press okay to automatically align the insert position with the origin. Employ the combined body function to execute Boolean operations on the components. Subtract the puncture set from one half of the lamini while retaining all lamini components.
Highlight that the ideal bone puncture regions include regions one, four and seven on the left side.
