Abstract
BackgroundAutotransplantation 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.MethodsThis 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.ResultsWe 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%.ConclusionsRapid 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.
Highlights
Autotransplantation is a beneficial treatment with a high success rate for young patients
The aim of this study was to report our application of Rapid prototyping (RP)-assisted autotransplantation in adult patients who were at relatively high risk of failure because of age, already formed donor tooth roots and poorly viable periodontal ligament cells
Subgroup analysis was performed and excluded all patients aged > 40 years; subsequently, age was no Discussion Several published case reports and case series have demonstrated the benefit of RP-assisted tooth autotransplantation [6, 7, 9, 11, 12, 14, 15]
Summary
Autotransplantation is a beneficial treatment with a high success rate for young patients. 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. Autotransplantation is defined as the surgical extraction of a donor tooth and the transfer of that tooth to a receptor site in the same patient. Machado et al [3] reported the long-term survival rate of autotransplantation to be 75%–91% These studies mostly focused on teenage populations, and studies on adult autotransplantation are scarce. Poor prognostic factors for tooth survival include patient age years, mandibular location for the donor tooth, and extra-alveolar time 15 min, as reported by Jang et al [4]. Donor tooth extra-alveolar time is the sole variable that can be controlled by oral surgeons and improved with skill and proper equipment
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
