Abstract: Objective: To develop a 3D printed orthodontic microimplant template which could be applied in clinical orthodontic implantation of microimplant anchorage and improve the implantation accuracy. Methods: The patients needed to be implanted microimplant anchorage were sent for CBCT and intraoral scan. The CT data stored in DICOM format and STL data scanned with intraoral scan were imported into 3Shape Implant Studio for fusion, so as to reconstruct the 3D model of maxillary and mandible bone. On the maxillary and mandible bone model reconstructed, the implant guide plate was designed according to the requirements of vertical bone surface of the microimplant, i.e. no damage to the root, maxillary sinus and other tissues, and as far as possible parallel to the root of the tooth, and the guide plate was printed with Formlabs2 3D printer. During the operation, the position and angle of the implant were determined by the guide plate, and the microimplant was implanted through the guide tube of the plate. After operation, the patients should take CBCT scanning that was used to evaluate the position and angle of the implant. Results: It was proved by CBCT that when the new type of orthodontic microimplant template was used during the operation, the position and angle of the microimplant were accurate and the microimplant did not loosen and fall out 3 months after the operation. Conclusion: 3D printed orthodontic microimplant guide plate was developed to improve the accuracy of implant placement and angle, prevent tooth root damage, and improve implant stability.

Key words: 3D printing, microimplant, template for placement, accuracy