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北京大学学报（医学版） ›› 2025, Vol. 57 ›› Issue (1): 121-127. doi: 10.19723/j.issn.1671-167X.2025.01.018

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集成压缩气流系统扫描头辅助获取液体干扰表面三维数据精度评价

徐昕恺1, 赵建江2, 田素坤2,*(), 刘中宁2, 赵晓一3, 赵晓波4, 江腾飞4, 陈晓军4, 马超4, 孙玉春1,2,*()   

  1. 1. 北京大学医学部医学技术研究院，北京 100191
    2. 北京大学口腔医学院·口腔医院口腔医学数字化研究中心，口腔修复教研室，国家口腔医学中心，国家口腔疾病临床医学研究中心，口腔生物材料和数字诊疗装备国家工程研究中心，国家卫生健康委口腔数字医学重点实验室，口腔数字医学北京市重点实验室，中国医学科学院口腔数字医学重点实验室，北京 100081
    3. 北京大学口腔医学院·口腔医院综合科，北京 100081
    4. 先临三维科技股份有限公司，杭州 311258
  • 收稿日期:2024-10-04 出版日期:2025-02-18 发布日期:2025-01-25
  • 通讯作者: 田素坤,孙玉春 E-mail:sukhum169@bjmu.edu.cn;kqsyc@bjmu.edu.cn
  • 作者简介:第一联系人：

    * These authors contributed equally to this work

  • 基金资助:
    国家重点研发计划(2023YFB4605400);国家自然科学基金(52105265);北京市自然科学基金-海淀原始创新联合基金(L232145);北京大学口腔医院临床新技术新疗法项目(PKUSSNCT-23B04)

Evaluation of the accuracy of three-dimensional data acquisition from liquid- interference surfaces assisted by a scanner head with a compressed airflow system

Xinkai XU1, Jianjiang ZHAO2, Sukun TIAN2,*(), Zhongning LIU2, Xiaoyi ZHAO3, Xiaobo ZHAO4, Tengfei JIANG4, Xiaojun CHEN4, Chao MA4, Yuchun SUN1,2,*()   

  1. 1. Institute of Medical Technology, Peking University Health Science Center, Beijing 100191, China
    2. Center of Digital Dentistry, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & NHC Key Laboratory of Digital Stomatology & Beijing Key Laboratory of Digital Stomatology & Key Laboratory of Digital Stomatology, Chinese Academy of Medical Sciences, Beijing 100081, China
    3. Department of General Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China
    4. Shining 3D, Hangzhou 311258, China
  • Received:2024-10-04 Online:2025-02-18 Published:2025-01-25
  • Contact: Sukun TIAN, Yuchun SUN E-mail:sukhum169@bjmu.edu.cn;kqsyc@bjmu.edu.cn
  • Supported by:
    National Key R&D Program of China(2023YFB4605400);the National Natural Science Foundation of China(52105265);the Beijing Natural Science Foundation(L232145);the Program for New Clinical Techniques and Therapies of Peking University School and Hospital of Stomatology(PKUSSNCT-23B04)

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摘要：

目的: 定量评价集成压缩气流系统扫描头辅助口内三维扫描仪(intraoral 3D scanners, IOS)获取的液体干扰表面数据精度，为集成压缩气流系统扫描头的临床应用提供精度数据。方法: 选择《YY/T 1818—2022牙科学口腔数字印模仪》中标准模型作为扫描对象，利用ATOS Q 12M得到三维扫描数据，作为扫描正确度评价的真值。基于现有扫描仪结构，研究设计了一种新型扫描方案，以解决液体导致IOS精度下降的问题。设计新型扫描头，并集成扫描系统与压缩气流系统，实现口内三维扫描仪在液体干扰表面的高精度数据采集。以常规标准扫描方式作为对照组，探究扫描镜头遮挡、气流、液体介质、新型扫描头对扫描过程及精度的影响，并设置4组实验，且每组扫描15次，以评价基于压缩气流系统扫描头辅助IOS获取液体干扰表面的精度数据。选用Elite和Primescan两款扫描仪作为精度数值的参考。结果: 在正确度和精密度两方面评价中，被液体干扰表面的扫描精度显著下降[正确度：18.5(6.5) vs. 38.0(6.7), P < 0.05;精密度：19.1(8.5) vs. 31.7(15.0), P < 0.05]；使用集成压缩气流系统的新型扫描头辅助口内三维扫描仪，扫描精度显著提升[正确度：22.3(7.6) vs. 38.0(6.7), P < 0.05;精密度：25.8(9.6) vs. 31.7(15.0), P < 0.05]。结论: 集成压缩气流系统的扫描头可以辅助提高IOS液体干扰表面数据的精度。

关键词: 口内三维扫描仪, 压缩气流系统, 精度, 液体干扰表面

Abstract:

Objective: To quantitatively evaluate the accuracy of data obtained from liquid-interference surfaces using an intraoral 3D scanner (IOS) integrated with a compressed airflow system, so as to provide clinical proof of accuracy for the application of the compressed airflow system-based scanning head in improving data quality on liquid-interference surfaces. Methods: The study selected a standard model as the scanning object, adhering to the "YY/T 1818—2022 Dental Science Intraoral Digital Impression Scanner" guidelines, a standard that defined parameters for intraoral scanning. To establish a baseline for accuracy, the ATOS Q 12M scanner, known for its high precision, was used to generate true reference values. These true values served as the benchmark for evaluating the IOS performance. Building on the design of an existing scanner, a new scanning head was developed to integrate with a compressed airflow system. This new design aimed to help the IOS capture high-precision data on surfaces where liquid-interference, such as saliva, might otherwise degrade scanning accuracy. The traditional scanning method, without airflow assistance, was employed as a control group for comparison. The study included five groups in total, one control group and four experimental groups, to investigate the effects of scanning lens obstruction, airflow presence, liquid media, and the use of the new scanning head on scanning process and accuracy. Each group underwent 15 scans, generating ample data for a robust statistical comparison. By evaluating trueness and precision in each group, the study assessed the impact of the compressed airflow system on the accuracy of IOS data collected from liquid-interference surfaces. Additionally, we selected Elite and Primescan scanners as references for numerical accuracy values. Results: The scanning accuracy on liquid-interference surfaces was significantly reduced in terms of both trueness and precision [Trueness: 18.5 (6.5) vs. 38.0 (6.7), P < 0.05; Precision: 19.1 (8.5) vs. 31.7 (15.0), P < 0.05]. The use of the new scanning head assisted by the compressed airflow system significantly improved the scanning accuracy [Trueness: 22.3(7.6) vs. 38.0 (6.7), P < 0.05; Precision: 25.8 (9.6) vs. 31.7 (15.0), P < 0.05]. Conclusion: The scanning head based on the compressed airflow system can assist in improving the accuracy of data obtained from liquid-interference surfaces by the IOS.

Key words: Intraoral 3D scanners, Compressed airflow system, Accuracy, Liquid-interference surfaces

中图分类号: 

  • R78

图1

扫描头的改进和使用情况"

图2

扫描模型的构建与特征壳设计"

表1

扫描分组及实验条件设置"

Group Scanning scheme Scanning head Fluids Airflow
El Conventional Conventional NA NA
Pr Conventional Conventional NA NA
G1 Conventional Conventional NA NA
G2 New New type NA NA
G3 New New type NA Dental triple syringe
G4 New New type ddH2O NA
G5 New New type ddH2O Dental triple syringe

图3

各分组预备体示意图"

表2

各组扫描的正确度"

Group Sample size Full arch(↓) Half arch(↓) Single crown(↓) χ2 Pvalue
El 15 12.3(1.3) 10.2(2.0) 10.0(1.3)
Pr 15 26.5(7.6) 21.6(3.3) 8.1(1.2)
G1 15 18.5(6.5)aA 11.8(1.3)aB 11.1(1.1)aB 30.054 < 0.001
G2 15 19.2(7.0)aA 12.9(2.4)aB 12.8(2.3)aB 23.992 < 0.001
G3 15 22.4(8.5)aA 13.5(3.7)aB 10.9(1.1)aC 35.171 < 0.001
G4 15 38.0(6.7)bA 33.3(8.3)bA 30.1(13.2)bA 4.512 0.105
G5 15 22.3(7.6)aAB 12.6(2.7)aA 11.2(1.7)aB 35.238 < 0.001
χ2 31.495 40.382 40.731
P value < 0.001 < 0.001 < 0.001

图4

正确度偏差可视化色阶图"

表3

各组扫描的精密度"

Group Sample size Full arch(↓) Half arch(↓) Single crown(↓) χ2 P value
El 105 11.1(1.8) 8.1(2.0) 5.5(0.8)
Pr 105 18.1(9.6) 9.2(3.1) 5.5(1.3)
G1 105 19.1(8.5)aA 9.5(2.6)aB 7.1(1.1)aC 247.988 < 0.001
G2 105 20.1(11.7)aA 11.0(3.0)bB 8.9(1.5)bC 232.264 < 0.001
G3 105 24.1(13.6)aA 10.3(3.7)bB 8.7(1.5)bC 229.115 < 0.001
G4 105 31.7(15.0)bA 20.6(9.2)cB 20.2(8.2)dC 115.474 < 0.001
G5 105 25.8(9.6)aAB 13.6(4.6)dA 10.0(2.4)bB 207.243 < 0.001
χ2 107.035 263.641 337.696
P value < 0.001 < 0.001 < 0.001

图5

精密度偏差可视化色阶图"

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ISSN 1671-167X
CN 11-4691/R
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