计算机虚拟设计辅助自体牙移植牙槽窝的精确预备

目的：通过计算机虚拟设计联合数字化手术导板技术,模拟自体牙移植术后的位置,同时辅助自体牙移植牙槽窝的精确预备。方法：选取10例自体牙移植手术患者,将其锥形束CT（CBCT）数据导入Proplan CMF 3.0软件。根据咬合和空间情况匹配移植牙,并将虚拟的移植牙转移至受植区,同时设计用于预备牙槽窝的数字化手术导板。利用计算机快速成型技术打印出手术导板和移植牙的3D模型。结果：计算机虚拟设计联合数字化导板技术,能够快速精确地引导受植区牙槽窝的精确预备。通过6个月随访,影像学检查显示所有病例均可见连续牙周膜影像,临床检查显示移植牙无明显松动,未探及明显牙周袋（<4 mm）,术后具有较高的存活率和成功率。结论：计算机虚拟设计能够准确模拟自体牙移植术后的位置,简化手术过程,提高受植区牙槽窝预备的精确性。

Application of computer virtual design to assist the accuracy of socket preparation during tooth autotransplantation

PURPOSE:It was aimed to apply computer virtual design and digital surgical templates to simulate postoperative position of tooth and guide the accuracy of socket preparation during tooth autotransplantation.METHODS:The study enrolled 10 patients who underwent tooth autotransplant surgery.Cone-bean CT(CBCT)data were imported into Proplan CMF 3.0 software.The donor tooth was transferred to the recipient site according to the occlusion and space situation.A digital template was designed to guide socket preparation.Computer-aided rapid prototyping(RP)technique was used to print the surgical template and tooth model.RESULTS:With computer virtual design and digital template,it was possible to accurately guide socket preparation in recipient site.The six-month follow-up results showed the periodontal space in the radiographs was continuous and intact.There was no mobility in all cases and the probing depth of the tooth was<4 mm.The related data showed a favorable survival and success rates of the donor teeth.CONCLUSIONS:Computer virtual design can successfully simulate postoperative position in tooth autotransplantation while simplifying the surgical procedure,and enhance the accuracy of socket preparation.