观察数字化三维（three-dimensional，3D）打印结合锥形束CT（cone beam CT，CBCT）辅助自体牙移植的临床效果。

选取2022年1月至2024年2月东阳市人民医院收治的40例自体牙移植患者，采用随机数字表法将患者分为对照组（20例，26颗牙）和试验组（20例，27颗牙），对照组采用CBCT联合3D数字建模辅助自体牙移植，试验组采用数字化3D打印结合CBCT辅助自体牙移植。比较2组患者手术时间、3D模型试植次数及移植牙存活率。并于术后1、3、6个月随访比较移植牙松动度、探诊深度及牙根吸收情况。

试验组手术时间、3D模型试植次数均少于对照组，移植牙存活率高于对照组，差异有统计学意义（P<0.05）。术后1、3、6个月，试验组移植牙松动度均低于对照组（P<0.05）；广义估计方程（generalized estimating equations，GEE）的Wald检验结果显示，2组时间效应差异有统计学意义（P<0.001）；组别效应及交互效应差异均无统计学意义（P>0.05）。2组术前及术后1个月探诊深度比较，差异无统计学意义（P>0.05），术后3、6个月试验组探诊深度低于对照组（P<0.01）；重复测量方差分析显示，组别效应及时间效应差异均有统计学意义（P<0.05）。术后6个月，试验组牙根吸收情况优于对照组，差异有统计学意义（P<0.05）。

数字化3D打印结合CBCT辅助自体牙移植可缩短手术时间，减少术中模型试植次数，提高移植牙存活率，并有助于改善移植牙稳定性，降低术后牙根吸收风险，具有良好的临床应用价值。

To observe the clinical effect of digital three-dimensional (3D) printing combined with cone beam CT (CBCT) in assisting autogenous tooth transplantation.

A total of 40 patients who underwent autogenous tooth transplantation at Dongyang People's Hospital from January 2022 to February 2024 were selected. They were divided into a control group (20 cases, 26 teeth) and an experimental group (20 cases, 27 teeth) using a random number table method. The control group received CBCT combined with 3D digital modeling‑assisted autogenous tooth transplantation, while the experimental group received digital 3D printing combined with CBCT‑assisted autogenous tooth transplantation. The operative time, number of 3D model trials, and survival rate of transplanted teeth were compared between the two groups. Tooth mobility, probing depth, and root resorption of the transplanted teeth were followed up and compared at 1, 3, and 6 months postoperatively.

The operative time and the number of 3D model trials in the experimental group were lower than those in the control group, and the survival rate of transplanted teeth was higher than that in the control group, with statistically significant differences (P<0.05). At 1, 3, and 6 months postoperatively, tooth mobility in the experimental group was lower than that in the control group (P<0.05). The Wald test in the generalized estimating equations (GEE) showed a statistically significant time effect (P<0.001), whereas neither the between‑group effect nor the interaction effect was statistically significant (P>0.05). There was no statistically significant difference in probing depth between the two groups before surgery or at 1 month postoperatively (P>0.05); at 3 and 6 months postoperatively, the probing depth in the experimental group was lower than that in the control group (P<0.01). Repeated‑measures analysis of variance (ANOVA) indicated that both the between‑group effect and the time effect were statistically significant (P<0.05). At 6 months postoperatively, root resorption in the experimental group was better than that in the control group, with a statistically significant difference (P<0.05).

Digital 3D printing combined with CBCT‑assisted autogenous tooth transplantation can shorten operative time, reduce the number of intraoperative model trials, improve the survival rate of transplanted teeth, enhance the stability of transplanted teeth, and reduce the risk of postoperative root resorption, demonstrating good clinical application value.