Rapid prototyping-assisted tooth autotransplantation is associated with a reduced root canal treatment rate: a retrospective cohort study

Abstract

Background Autotransplantation is a beneficial treatment with a high success rate for young patients. However, most adult patients require root canal treatment (RCT) of the donor teeth after the autotransplantation procedure, which causes a prolonged treatment time and additional expenses and increases the rate of future tooth fracture. Rapid prototyping (RP)-assisted autotransplantation shortens the extra-alveolar time and enables a superior clinical outcome. However, no cohort studies of the application of this method on adult populations have been reported. Methods This study is a retrospective cohort study. All patients underwent autotransplantation from 2012 to 2020 in the Kaohsiung and Chia-Yi branches of Chang Gung Memorial Hospital, and the procedure and clinical outcomes were analysed. Differences in clinical outcomes, age, sex, extra-alveolar time, fixation method, and RCT rate were compared between the two groups. Results We enrolled 21 patients, 13 treated using the conventional method and 8 treated using the RP-based technique. The RCT rates of the conventional group and RP group were 92.3% and 59%, respectively. The mean age of the two groups was significantly different (28.8 ± 10 vs. 21.6 ± 2.1); after performing subgroup analysis by excluding all of the patients aged > 40 years, we found that the RCT rates were still significantly different (91.0% vs. 50%). The mean extra-alveolar time was 43 s in the RP group, and the autotransplantation survival rate in both groups was 100%. Conclusions Rapid prototyping-assisted autotransplantation was successfully adopted for all patients in our study population. By shortening the extra-alveolar time, only 50% of the patients required a root canal treatment with a 100% autotransplantation survival rate. Trial Registration : Retrospectively registered.

Reconsidering some standards in immediate autotransplantation of teeth: Case report with 2-year follow-up

“…The 3D replica substantially aided in reducing the extra-alveolar time, which had been considered an important influencing factor for normal periodontal healing and DAT success [ 13 ]. A recent retrospective study showed that DAT assisted by rapid prototyping was associated with reduced need for RCT [ 14 ]. Pre-preparing the recipient site with aid of transplant replica also averted unnecessary osteotomy during DAT.…”

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 ]. The use of rapid prototyping for autotransplantation enabled accurate positional planning and decreased the extra-alveolar time and endodontic treatment rate [ 17 ].…”

“…For formation of a transplant cavity, a donor tooth replica was fabricated before surgery using 3D printer machine [ 17 ]. The use of rapid prototyping for autotransplantation enabled accurate positional planning and decreased the extra-alveolar time and endodontic treatment rate [ 17 ].…”

Combined Application of Virtual Simulation Technology and 3-Dimensional-Printed Computer-Aided Rapid Prototyping in Autotransplantation of a Mature Third Molar

“…Extra-oral RCT during ATT is not recommended because of the risk of PDL injury and prolonged extra-alveolar time [ 5 ]. Recent studies stated that only 50% of the patients of CARP-based ATT therapy required a root canal treatment with a 100% autotransplantation survival rate [ 23 , 24 ]. Hence, the studies stated that rapid prototyping-assisted autotransplantation is associated with a reduced RCT rate, but an adequate sample size and long-term follow-ups are required for further study.…”