Clinical study on prognostic factors for autotransplantation of teeth with complete root formation

Flowchart of the teeth transplantation procedures followed at Niigata University Medical and Dental Hospital.

A successful case. Lower right second molar was extracted because of the decayed tooth. Right third molar was transplanted to the lost second molar region. (A) Panoramic radiograph taken preoperatively. (B) Periapical radiograph taken 2 months after transplantation. (C) Periapical radiograph taken 3 years after transplantation. There are no radiographic signs of root resorption and a continuous periodontal ligament space is present.

A case of initial healing failure. Lower right second molar was extracted because of the decayed tooth. Right third molar was transplanted to the second molar region at the same time. (A) Panoramic radiograph taken preoperatively. The recipient socket connected with the donor tooth socket. (B) Periapical radiograph taken 2 days after transplantation. (C) Intraoral photograph taken 4 weeks after transplantation. Infection observed 4 weeks postoperatively. There was exudate discharge from the distal region of the transplant (arrow head).

A case with replacement root resorption and periodontal inflammation. Upper left third molar transplanted to the position of the lost lower left second molar. (A) Panoramic radiograph taken preoperatively. (B) Periapical radiograph taken 2 years after transplantation. Replacement root resorption was seen (arrow head). (C) Periapical radiograph taken 7 years after transplantation. Root resorption has progressed and bone resorption can also be seen (arrow head).

A case with delayed bone regeneration. Lower right third molar transplanted to the position of the lost second molar. (A) Panoramic radiograph taken preoperatively. (B) Periapical radiograph taken 1 year after transplantation. Radiolucent areas in marginal bone are still seen (arrow head). (C) Periapical radiograph taken 2 years after transplantation. Bone resorption has progressed (arrow head).

The overall life-table for the autotransplanted teeth.

Life-tables for autotransplanted teeth according to patient parameters: (A) age; (B) gender; (C) smoking habit.

Life-tables for autotransplanted teeth according to donor tooth parameters: (A) source; (B) type; (C) pocket depth.

Life-tables for autotransplanted teeth according to donor tooth parameters: (A) state of eruption; (B) contact with opposing tooth; (C) history of dental caries and/or restoration.

Life-tables for autotransplanted teeth according to donor tooth parameters: (A) history of root canal treatment; (B) number of roots; (C) root fracture at removal.

Life-tables for autotransplanted teeth according to recipient site parameters: (A) position (1) maxilla/mandible; (B) position (2) molars/others; (C) duration of the absence of teeth, (D) number of socket bone walls.

Life-tables for autotransplanted teeth according to parameters of positional relation of donor tooth and recipient site: (A) adjacent position; (B) same quadrant; (C) opposite side of the jaw; (D) opposite jaw.

Life-tables for autotransplanted teeth according to other parameters: (A) need to adjust the donor tooth to fit the recipient site; (B) fixation.