3D打印上颌骨手术模型误差测量的实验研究

目的 分析3D打印上颌骨手术模型的误差,为口腔颌面外科3D打印技术的应用提供基础数据支持.方法 应用熔纤3D打印技术制作标准几何模型和上颌骨模型,观测两种模型的表面光洁度,测量几何模型的外形数据和精细度,测量上颌骨模型与颌骨标本骨性标志物间的距离误差.结果 3D打印标准几何模型的表面X-Z、Y-Z平面呈水平排列,X-Y平面呈经纬交错排列,精度误差率在-1.67％～1.47％;最高解析度X及Y轴边长为0.25 mm,Z轴边长为0.50 mm.3D打印上颌骨模型骨性标志点间距离的误差率在-0.08％～1.96％,X轴向上误差率均值为1.59％,Y轴为0.86％,Z轴为0.42％,X轴误差率显著大于Y、Z轴(P＜0.05).结论 3D打印技术制作上颌骨模型具有很高的精确度,通过合理设计可以提高模型制作精度来满足临床需要.

A study on the dimensional error of 3D printing maxilla models

Objective To measure the dimensional error of three dimensional printing maxilla models for the clinical application to oral and maxillofacial surgery.Methods The FDM 3D printing was employed to make standard geometric shape models and maxillary models.After the surface finish of both models being observed,the contour data and fineness of geometric models,as well as the distance error of bony markers between maxillary models and jaw bones specimen were measured.Results Within the 3D printing standard geometric model,the fiber arrange horizontally in X-Z,Y-Z surface and crosswise in X-Y surface,and the accuracy errors range from-1.67％ to 1.47％.Moreover,the maximum resolution was 0.25 mm in X and Y axis,and 0.50 mm in Z axis.Within the maxillary model,the distance error of bony markers range from-0.08 ％ to 1.96 ％,and the mean errors were 1.59 ％,0.86％,0.42％ in X,Y and Z axis respectively.The mean error in X axis was significantly larger than that in Y or Z axis (P＜0.05).Conclusion 3D printing maxilla models may possess high accuracy and apply to clinical practice.