| Objective To evaluate the effect of the tooth replica manufactured by CBCT combined with 3D printing technology during the perioperative period of molar autotransplantation and the influence on the postoperative effect of molar autotransplantation.Methods Twenty-eight patients who met the inclusion criteria of this study were selected as the research subjects and were randomly divided into two groups.Fourteen patients in the observation group adopted tooth autotransplantation with the assistance of 3D printed tooth replica.Fourteen patients in the control group were treated with the traditional tooth autotransplantation.Collect and analyze the information of patients,the extra-oral time of donor tooth,the time of preparing tooth socket,the fitting attempts using donor tooth,the distance between the transplanted root surface and the alveolar bone as well as the survival rate and the success rate on 6 months and 12 months after operation.VAS was used to evaluate the degree of anxiety before surgery,the degree of pain postoperative as well as the satisfaction of patients after tooth autotransplantation.Statistical software SPSS22.0 was used for data analysis,and P < 0.05 was statistically significant.Results In the observation group,there were 3 males and 11 females,the average age was(25.71±4.97)years old,and the average number of donor roots was 1.79±0.43.In the control group,there were 4 males and 10 females,with an average age of(26.64±4.11)years old,and the average number of donor roots was 1.57±0.51.There was no significant difference in age,gender and number of donor roots between the two groups(P > 0.05).The extra-oral time of donor tooth was(2.40±2.21)min in the observation group and(17.77±5.05)min in the control group(P < 0.001).The time of preparing tooth socket was(15.01±3.75)min in the observation group and(19.29±5.07)min in the control group(P < 0.05).The fitting attempts using donor tooth was(2.71±1.27)in the observation group and(6.43±3.13)in the control group(P <0.001).There was no significant difference between the two groups in the distance from transplanted root surface to alveolar bone(P>0.05).The survival rate of transplanted teeth in the observation group was 100% after 6 and 12 months of follow-up,while that in the control group was 100% after 6 months of follow-up and the survival rate of transplanted teeth was 92.86% after 12 months of follow-up(P > 0.05).After 12 months of follow-up,the the success rate was 85.71% in the observation,and 71.43% in the control group was(P > 0.05).In terms of the satisfaction of patients,the degree of anxiety before surgery as well as the degree of pain 24 h postoperative in the observation group was lower than that in the control group,and the satisfaction with the chewing function of the transplanted teeth was higher than that in the control group(P < 0.05).There was no significant difference between the two groups in the degree of pain one week postoperative,the convenience of self-maintenance of the transplanted tooth,the aesthetic,the degree of considering the transplanted tooth as a part of oneself,and the satisfaction of the expenses.Conclusion It is an effective method to apply 3-dimensionally printed replica in molar autotransplantation.During the operation,the tooth replica can shorten the extra-oral time of donor tooth and the time of preparing tooth socket,it also can reduce the number of fitting attempts using donor tooth.At the same time,the tooth replica helps to educate patients before surgery and helps reduce postoperative pain.The effect of3-dimensionally printed replica on the long-term survival rate and success rate of the transplanted teeth after molar autotransplantation still needs to be studied with a larger sample size and longer follow-up time. |
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