A retrospective analysis of autotransplanted teeth including an evaluation of a novel surgical technique

Abstract

Objectives To assess survival rates and frequency of complications for immature and mature autotransplanted teeth after at least 1 year in function. Materials and methods All consecutive patients who had undergone tooth autotransplantation between 2000 and 2018 were invited to a clinical and radiographic follow-up examination. First, survival rates were calculated on the basis of a phone inquiry. A clinical follow-up examination allowed for the calculation of the success rate, i.e., absence of any potentially adverse clinical and radiographic findings of the autotransplanted teeth. Moreover, the effect of demographic, dental, and surgical variables on survival/success was analyzed statistically. Results Thirty-eight teeth in 35 patients were transplanted during the study period. Three teeth in 3 patients were excluded due to missing records. All other patients were successfully contacted and interviewed by phone. Out of these 35 transplants, 32 were still in function, and 3 had been extracted, yielding a 91.4% survival probability after a median follow-up of 3.4 years. Of the 32 teeth qualifying for the success analysis, 20 (62.5%) showed absence of potentially adverse findings, while 3 (9.4%) required root canal treatment (RCT). Out of the 9 mature, root-end resected transplants, 4 exhibited ongoing pulp canal obliteration, all with a single root canal. Postoperative and potentially adverse findings or failures were found more frequently in the group of mature transplants (55.6%) than immature transplants (30.4%) and for molars (72.7%) than premolars (17.6%) or canines (25%). None of the potential predictors had a statistically significant effect on survival or success. Conclusion Autotransplanted teeth yielded a satisfying midterm survival rate regardless of their stage of development. An additional, extraoral root-end resection of mature transplants may lead to rates of revascularization and postoperative pulp canal obliteration higher than the data reported on unmodified mature transplants. Clinical relevance Extraoral root-end resection of mature teeth shows promising outcomes for transplants especially with a single root canal and uncomplicated root morphology.

Immediate Tooth Autotransplantation with Root Canal Filling and Partially Demineralized Dentin/Cementum Matrix into Congenital Missing Tooth Region

“…Regarding the technique of autotransplantation of mature teeth, the extraoral root-end resection of teeth with complete root formation showed promising outcomes for transplants, especially with a single root canal and uncomplicated root morphology [ 16 ]. For formation of a transplant cavity, a donor tooth replica was fabricated before surgery using 3D printer machine [ 17 ].…”

Long-Term Outcome of Autotransplantation of a Complete Root Formed a Mandibular Third Molar

“…On the other hand, the total success rates of autotransplantation were 94% with the open apex teeth and 84% with closed apex groups [ 14 ]. The other retrospective study showed 92% of the survival rate of the immature root form-autotransplanted teeth for midterm length [ 15 ]. In this study, the authors utilized the enamel matrix derivatives (EMD) to apply the root surface to enhance the healing process if necessary.…”

Tooth transplantation and replantation: Biological insights towards therapeutic improvements

“…A long‐term follow‐up study showed tooth transplantation success rates of over 90% for patients aged younger than 30 years and 80% for patients aged older than 30 years, with long‐term outcomes of more than 20 years (Tsukiboshi et al, 2019). In another study, immature and mature auto‐transplanted teeth yielded a 91.4% survival probability after a median follow‐up period of 3.4 years, with 62.5% of the tooth showing non‐adverse findings (Raabe et al, 2021).…”