Computer aided planning surgical guide
Farida El Khouli
May 7, 2021
Designing and fabrication of computer aided planning surgical guide ready for being export as STL file in software is a multidisplinary approach on the basis of prosthetically driven treatment planning in which both implant placement in respect to anatomical tracing will follow . To summerize the Computer aided planning and manifacturing dependant on multiple steps to include CBCT , importing based on support needed , Aligning STL with pre existing anatomy , Designing boundaries of surgical guide tempelate , 3D printing , finishing the delivered tempelate and Drilling through compeltely guided template .
1
CBCT
CBCT record that holds DICOM file (DICOM file is a 3D X-ray file) that provides you the field of view needed to provide you with the patient hard tissue information where you can:
-Trace Anatomical landmarks like maxillary sinuses or inferior alveolar nerves
-Trace the boundaries of arch curve in axial view
-Trace opposing dentition needed to set the prosthesis in position in respect to occlusion
-Placing accordingly the implant in respect to “prosthetically driven” with available bone height following primarily the occlusion.
2
Importing
Importing in the software the data set for the patient mouth scan needed as STL files ( a 3D file for the patient mouth scan using intra-oral scanner or the 3D file for the stone model scan using extra-oral scanner) to design and fabricate computerized surgical guide that gives you information dependent on “ Type of support “ Surgical guide offers based on the case .
3
Aligning
Aligning the imported data (DICOM & STL files) for the patient bone, teeth, and gum to registering it on existing bone anatomical CBCT where implants are virtually placed based on the prosthetic driven treatment planning approach
4
Designing
Designing the boundaries of the surgical guide and choosing the implant surgical kit that is compatible with the chosen implant system, after designing the surgical guide we have to export it as STL file that is ready for 3D printing
5
3D printing
3D printing of the designed surgical guide using any SLA 3D printer by using a class II-a biocompatible 3D printing resin, after the 3D printing the guide have to be finished and post cured
6
Sterilization and disinfection
The surgical guide then sterilized or disinfected and inserted inside the patient mouth to check the proper seating of the surgical guide before starting the drilling sequence
7
Drilling
Finally, we have to start the drilling sequence for the drills of the computer guided surgical kit