(TC26) 3D Printing for Predictable Autotransplantation

This table clinic presents a unique case of auto-transplantation of a third molar to a second molar site with incorporation of 3D printing to improve planning and surgical efficiency. A 21-year-old female presented with tooth #31 with non-restorable decay. Partially erupted #32, which was otherwise planned for routine extraction, had compatible root anatomy for autotransplantation. Using the DICOM file from the preoperative small volume CBCT, an acrylic model of the mandible, tooth #31, and tooth #32 were 3D printed. These models were utilized for preoperative planning, analyzing root shape and length and examining the socket wall anatomy. During surgery the acrylic analog of #32 was used to facilitate socket preparation and estimate the amount of resection needed prior to extracting the real #32, reducing extraoral time drastically. #32 was extracted, resected, retroprepped, retrofilled with bioceramic putty, and inserted into the #31 socket successfully. A bonded splint was placed for two weeks, at which point endodontic treatment was performed. Several months of follow up have shown showing successful integration and bony healing. Utilization of 3D printing for autotransplantation cases can improve preoperative planning, decrease the extraoral time of the donor tooth, and increase predictability.