构建3D打印牙齿模型及其形态仿真性研究  

Generation of a 3D printed tooth model and evaluation of the anatomic fidelity

作　　者：宋颖[1,2] 唐雷[1] 吴补领[2] 李鉴轶[1] 王文昊[3] 徐楚[1,2] 白宇哲 易思[1] 徐迪威 

机构地区：[1]南方医科大学人体解剖学教研室广东省医学生物力学重点实验室,广州510515 [2]南方医科大学南方医院南方医科大学口腔医学院,广州510515 [3]南方医科大学第三附属医院,广州510630 [4]中国人民解放军总医院第一附属医院四肢修复重建外科,北京100048

出　　处：《中国临床解剖学杂志》2016年第3期298-302,307,共6页Chinese Journal of Clinical Anatomy

基　　金：国家自然科学基金重大项目(61190120;61190122;61190123)

摘　　要：目的应用3D打印技术构建出3D打印牙齿模型以替代离体牙,并通过形态仿真性研究来探讨3D打印牙齿模型在临床应用前景。方法选择合适的3D打印材料及设备并测试材料根管成型能力。用锥形束CT筛选出完整的单根管前牙、双根管前磨牙、双根管磨牙、三根管磨牙,再行显微CT扫描并数字化三维重建,获得3D打印牙齿模型。对模型二次扫描并重建,利用Geomagic Qualify 11与原牙齿三维模型进行三维比较,通过检测模型与原牙齿的差异来分析不同材料3D打印牙齿模型的精确度。结果成功构建出3D打印牙齿模型。在表面形态上,Wic300a模型组绝对偏差值为(0.008121±0.0480)mm,E-Dent模型组为(0.009554±0.0526)mm;髓腔形态上,Wic300a模型组绝对偏差值为(0.045181±0.1022)mm,E-Dent模型组为(0.056953±0.1995)mm。结论 3D打印牙齿模型离体牙仿真度较高,3D打印牙齿模型可用于口内操作培训及术前模拟等。Objective To generate a 3D printed tooth model with a specific focus on anatomic fidelity instead of extracted tooth for dental training and preoperative surgical rehearsal. Methods Appropriate materials and machines of 3D printing were selected in this research. We made a test to explore the shaping ability of root canal among three kinds of materials. Intact human incisor of one root canal, premolar of bi root canals, molars of two and three root canals were screened out by Cone Beam Computed Tomography. Then we reconstructed the 3D models and generated 3D printed tooth models after scanning of the teeth by Micro-CT. The reconstruction of printed models to the reconstruction of real tooth was compared, we made an evaluation of the anatomic fidelity of the models by Geomagic Qualify 11. Results The printed tooth models are successfully produced. In terms of surface morphology, the absolute deviations were （0.008121±0.0480） mm in Wic300a models and （0.009554±0.0526） mm in E-Dent models. While the absolute deviations were （0.04518±0.1022） mm in Wic300a models and （0.056953±0.1995） mm in E-Dent models in pulp cavity morphology. Conclusion The printed tooth models are highly realisticin the terms of morphology and this model serves as an excellent replica of human teeth for training and preoperative surgical rehearsal.

关 键 词：3D打印 三维重建 形态仿真性 术前模拟 技能培训 

分 类 号：R781[医药卫生—口腔医学]