壁厚设计对三维打印树脂牙列模型精度的影响

doi:10.13591/j.cnki.kqyx.2025.07.004

口腔医学 ›› 2025, Vol. 45 ›› Issue (7): 502-505.doi: 10.13591/j.cnki.kqyx.2025.07.004

壁厚设计对三维打印树脂牙列模型精度的影响

赵艳芳¹, 张春宝², 刘欢³, 李恺⁴, 辛海涛³, 胡家欢², 吴玉禄²()

1 北京大学第三医院口腔科,北京(100191)
2 口颌系统重建与再生全国重点实验室,国家口腔疾病临床医学研究中心,陕西省口腔医学重点实验室,空军军医大学第三附属医院口腔修复工艺科,陕西西安(710032)
3 空军军医大学第三附属医院口腔修复科,陕西西安(710032)
4 空军军医大学空军第九八六医院口腔科,陕西西安(710054)

收稿日期:2024-08-20 出版日期:2025-07-28 发布日期:2025-07-24
通讯作者: 吴玉禄 E-mail:xiufu2004@126.com
基金资助:
国家口腔临床医学中心课题(LCB202217);空军军医大学第三附属医院新技术重点项目(LX2021-202);空军军医大学军事医学提升项目(2020JSTS24)

Accuracy of 3D printed models created by different designs of wall thickness

ZHAO Yanfang¹, ZHANG Chunbao², LIU Huan³, LI Kai⁴, XIN Haitao³, HU Jiahuan², WU Yulu²()

Department of Stomatology, Third Hospital of Peking University, Beijing 100191, China

Received:2024-08-20 Online:2025-07-28 Published:2025-07-24

摘要/Abstract

摘要：

目的研究不同壁厚设计对三维打印树脂牙列模型精度(正确度和精密度)的影响。方法将上颌标准石膏牙列模型仓扫数据导入Exocad软件中,设计4种结构的打印模型,分别为壁厚2、3、4 mm的马蹄形空心模型和马蹄形实心模型,每组打印6个牙列模型。打印第1天和第7天对其进行扫描,扫描文件与相应模型设计文件导入Geomagic软件中进行偏差分析,获得其精度的均方根值(root mean square,RMS)进行统计学分析。结果 4组牙列模型打印第1天的正确度范围为(34.63±4.17)~(45.26±6.50)μm,差异无统计学意义。精密度范围(30.25±10.18)~(47.65±14.77)μm,实心组精密度低于其他3组(P<0.05)。4组模型打印第7天的正确度范围为(49.00±9.11)~(69.25±9.70)μm,壁厚2 mm组正确度低于实心组与壁厚4 mm组(P<0.05)。结论 4组模型的精度均在临床可接受范围。模型打印第1天实心组精密度最差,打印第7天壁厚2 mm空心组的正确度较差。

关键词: 壁厚, 三维打印, 树脂牙列模型, 正确度, 精密度

Abstract:

Objective To study the effect of wall thickness on the accuracy (trueness and precision) of 3D printed models. Methods The 3D scanning data of the standard gypsum dental arch model was imported into Exocad software. And four sets of models were designed, including horseshoe shaped solid model and horseshoe shaped hollow models with different wall thicknesses (2 mm, 3 mm, 4 mm). On the first and seventh day after printing, the 3D scanning data of resin models were imported into Geomagic software. Deviation analysis were performed on 3D printed models for the root mean square (root mean square, RMS). Results The trueness range of the four groups of printed models on the first day was (34.63±4.17)μm to (45.26±6.50)μm, there was no statistical difference. The precision range was (30.25±10.18)μm to (47.65±14.77)μm, and the precision of the solid group was lower than the other three groups (P<0.05). The trueness range of the four groups of printing models on the 7th day was (49.00±9.11)μm to (69.25±9.70)μm. The trueness of the 2 mm wall thickness group was lower than that of the solid group and the 4 mm wall thickness group (P<0.05). Conclusion The accuracy of printing models with different wall thicknesses was within the clinical acceptance range. There was no statistically significant difference in the trueness values of the four groups of printing models on the first day. The precision value of the solid group was the lowest. On the 7th day, the trueness of the wall thickness of 2 mm group was lower than that of the solid group and the 4 mm wall thickness group.

Key words: wall thickness, 3D printing, resin dental model, trueness, precision

中图分类号:

R783.2

赵艳芳, 张春宝, 刘欢, 李恺, 辛海涛, 胡家欢, 吴玉禄. 壁厚设计对三维打印树脂牙列模型精度的影响[J]. 口腔医学, 2025, 45(7): 502-505.

ZHAO Yanfang, ZHANG Chunbao, LIU Huan, LI Kai, XIN Haitao, HU Jiahuan, WU Yulu. Accuracy of 3D printed models created by different designs of wall thickness[J]. Stomatology, 2025, 45(7): 502-505.

图/表 3

参考文献 26

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组别	实心组	壁厚2 mm空心组	壁厚3 mm空心组	壁厚4 mm空心组
第1天	45.26±6.50^a	44.80±9.00^a	42.98±6.62^a	34.63±4.17^a
第7天	50.23±7.23^a	69.25±9.70^b	60.23±9.63^ab	49.00±9.11^a

壁厚设计对三维打印树脂牙列模型精度的影响

Accuracy of 3D printed models created by different designs of wall thickness

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