报道三维（3D）打印技术辅助自体牙移植联合术后延期部分活髓切断术1例。通过采集患者术前的锥形束CT（CBCT）数据，应用Mimics软件设计构建移植牙3D模板，消毒后指导受植区牙槽窝预备；拔除无保留价值患牙后，利用该导板完成受植窝制备。3D打印辅助的外科手术通过精准制备受植窝，可缩短移植牙离体时间，为移植牙牙周膜存活提供保障。根尖孔直径大小是移植牙牙髓能否发生血运重建的关键因素，本病例供牙根尖孔直径分别为近中根0.68 mm和远中根0.91 mm，术后实现根尖孔直径大的远中牙根的活髓保存，为成熟自体恒牙移植活髓保存提供了新的思路。

This case report presents a successful case of autologous tooth transplantation assisted by three-dimensional (3D) printing technology combined with delayed partial pulpotomy. Preoperative cone-beam computed tomography (CBCT) data of the patient were collected, and Mimics software was used to design and construct a 3D template for the transplanted tooth. After disinfection, the template was used to guide the preparation of the alveolar socket at the recipient site. Following the extraction of the hopeless tooth, the recipient socket was prepared with the aid of the template. 3D printing-assisted digital surgery enabled accurate preparation of the recipient site, reduced the extraoral time of the transplanted tooth, and preserved the viability of the periodontal membrane. The physical dimension of the apical foramen is a critical determinant of revascularization of the transplanted dental pulp. In this case, the apical foramen diameters of the mesial and distal roots were 0.68 mm and 0.91 mm, respectively. Postoperatively, vital pulp preservation was achieved in the distal root with a larger apical foramen. This case provides a novel clinical reference for vital pulp preservation during mature autologous permanent tooth transplantation.