数控拔牙技术的实验研究

A preliminary study on 3D reconstruction and extracting mandibular first molar by dint of high-speed air turbine handpiece based on rapid prototyping

目的探讨牙颌数字化三维重建技术与快速成型技术、数控技术相结合,实现微创和自动化拔牙的可行性。方法锥形束CT(cone beam computed tomography,CBCT)扫描下颌牙颌标本,获得数据。采用Mimics软件重建牙颌三维实体模型,Magics软件进行数据修补。选取左侧下颌第一磨牙三维立体数据,快速成型软件切片、UG软件数据转换,导入自行研制的数控拔牙机,严格坐标定位后磨除左侧下颌第一磨牙。结果建立了良好的三维牙颌模型,用数控拔牙机成功磨除左侧下颌第一磨牙。结论牙颌数字化三维重建技术与快速成型技术、数控技术相结合,应用于数控拔牙机拔除标本牙是可行的。

Objective A new technique combined with digital dental teeth,3D reconstruction from cone beam computed tomography（CBCT） data and rapid prototyping is presented,in order to solve the difficulties of tooth extracting by traditional chisel.Methods Software Mimics and Magics were used to reconstruct three dimensional model from CT image scanned by DCTPRo CBCT with 0.2 mm slice thickness.The achievement can be applied to accomplish tooth extracting by high-speed air turbine handpiece based on rapid prototyping.Results Mandibular first molar was extracted by dint of high-speed air turbine handpiece based on rapid prototyping.Conclusion The new technique combined with digital dental teeth and rapid prototyping can be used to solve the difficulties of the tooth extracting by traditional chisel.