Fabrication and accuracy research on 3D printing dental model based on cone beam computed tomography digital modeling

doi:10.7518/hxkq.2018.02.008

Abstract

Abstract:

Objective The aim of this study is to build a digital dental model with cone beam computed tomography (CBCT), to fabricate a virtual model via 3D printing, and to determine the accuracy of 3D printing dental model by comparing the result with a traditional dental cast. MethodsCBCT of orthodontic patients was obtained to build a digital dental model by using Mimics 10.01 and Geomagic studio software. The 3D virtual models were fabricated via fused deposition modeling technique (FDM). The 3D virtual models were compared with the traditional cast models by using a Vernier caliper. The measurements used for comparison included the width of each tooth, the length and width of the maxillary and mandibular arches, and the length of the posterior dental crest. Results 3D printing models had higher accuracy compared with the tradi-tional cast models. The results of the paired t-test of all data showed that no statistically significant difference was observed between the two groups (P>0.05). Conclusion Dental digital models built with CBCT realize the digital storage of patients’ dental condition. The virtual dental model fabricated via 3D printing avoids traditional impression and simplifies the clinical examination process. The 3D printing dental models produced via FDM show a high degree of accuracy. Thus, these models are appropriate for clinical practice.

Key words: digital dental model, cone beam computed tomography, 3D printing technique

CLC Number:

R783.5

Huirong Zhang, Lefeng Yin, Yanli Liu, Liyi Yan, Ning Wang, Gang Liu, Xiaoli An, Bin Liu. Fabrication and accuracy research on 3D printing dental model based on cone beam computed tomography digital modeling[J]. West China Journal of Stomatology, 2018, 36(2): 156-161.

Figures/Tables 7

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组别	平均值	标准差	标准误	95%置信区间		t值	自由度	P值
组别	平均值	标准差	标准误	下限	上限	t值	自由度	P值
石膏组1-3D打印组1	0.002 27	0.017 10	0.002 58	-0.002 93	0.007 47	0.882	43	0.383
石膏组2-3D打印组2	0.000 68	0.016 76	0.002 53	-0.004 41	0.005 78	0.270	43	0.789
石膏组3-3D打印组3	0.000 68	0.017 17	0.002 59	-0.004 54	0.005 90	0.263	43	0.794
石膏组4-3D打印组4	0.001 59	0.016 70	0.002 52	-0.003 49	0.006 67	0.632	43	0.531
石膏组5-3D打印组5	0.001 82	0.017 02	0.002 57	-0.003 36	0.006 99	0.709	43	0.482
石膏组6-3D打印组6	0.001 59	0.014 93	0.002 25	-0.002 95	0.006 13	0.707	43	0.484