Accuracy of iTero Element 1 Intraoral Scanner Digital Model in Mild to Moderate Crowding of the Maxillary and Mandibular Arch
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摘要:
目的 评估轻中度拥挤下采用iTero Element 1口内扫描仪获得的数字化模型和传统石膏模型测量数据的准确性。 方法 选取到昆明医科大学附属口腔医院前兴路门诊部就诊的37名患者，使用iTero Element 1口内扫描仪扫描获得数字化模型和藻酸盐取模获得同一患者传统石膏模型，比较数字化模型自动测量和传统石膏模型人工测量牙冠宽度、牙弓宽度、覆盖的差异。 结果 数字化模型和石膏模型的3次重复测量一致性检验ICC值均在0.9以上，均具有良好的可重复性。轻度拥挤组11、16、21、31、36、41、43、46牙冠宽度、14～24牙弓宽度、22覆盖，中度拥挤组11、23、16、31牙冠宽度、14～24牙弓宽度、11、12覆盖差异有统计学意义（P < 0.05）。 结论 iTero数字化模型在轻中度拥挤时部分数据与手工测量石膏模型存在一定差异，可能是由于牙齿排列不齐，导致测量误差，但测量数据差异较小，不影响iTero数字化模型在临床中的应用。 -
关键词:
- 数字化模型 /
- 石膏模型 /
- iTero Element 1口内扫描仪 /
- 拥挤度
Abstract:Objective To evaluate the accuracy of digital models obtained using the iTero Element 1 intraoral scanner and traditional plaster models for measurements in mild to moderate crowding. Methods 37 patients who sought treatment at the Qinxing Road Clinic of Kunming Medical University Affiliated Stomatological Hospital were selected. The iTero Element 1 intraoral scanner was used to obtain digital models, while alginate impression was used to obtain traditional plaster models. The differences in digtal measurements and manual measurements of the traditional plaster models of tooth crown width, dental arch width, and coverage were compared. Results The ICC value of the three repeated measurements for both digital and plaster models were all above 0.9, indicating good repeatability. There were statistically significant differences in the arch width of 14～24 in mild and moderate crowded group, crown width （11、16、21、31、36、41、43、46） and 22 overjet in mild crowded group, and crown width of （11、23、16、31）and 11、12 overjet in moderate crowded group. Conclusion There are some differences between the data from iTero digital models and the manually measured plaster models in cases of mild to moderate crowding. This may be due to misalignment of teeth, leading to measurement errors. However, the differences in measurement data are small and do not affect the clinical application of iTero digital models. -
Key words:
- Digital model /
- Plaster model /
- iTero Element 1 intraoral scanner /
- Crowd
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表 1 石膏模型和数字化模型3次重复测量牙冠宽度的ICC值
Table 1. The ICC value of the three repeated measurements consistency tests of the digital model and plaster model
测量项目 石膏模型测量ICC值 数字化测量ICC值 11牙冠宽度 0.946 0.986 12牙冠宽度 0.972 0.982 13牙冠宽度 0.954 0.962 14牙冠宽度 0.963 0.966 15牙冠宽度 0.994 0.962 16牙冠宽度 0.957 0.950 21牙冠宽度 0.973 0.991 22牙冠宽度 0.980 0.993 23牙冠宽度 0.940 0.972 24牙冠宽度 0.972 0.936 25牙冠宽度 0.991 0.984 26牙冠宽度 0.910 0.969 31牙冠宽度 0.954 0.945 32牙冠宽度 0.958 0.956 33牙冠宽度 0.950 0.977 34牙冠宽度 0.972 0.952 35牙冠宽度 0.994 0.990 36牙冠宽度 0.937 0.969 41牙冠宽度 0.933 0.942 42牙冠宽度 0.921 0.926 43牙冠宽度 0.982 0.978 44牙冠宽度 0.957 0.964 45牙冠宽度 0.991 0.991 46牙冠宽度 0.982 0.976 
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表 2 上颌牙列轻中度拥挤下石膏模型测量和iTero Element 1测量牙冠宽度差值（mm，
$\bar x \pm s $ ）Table 2. Difference of crown width measured by plaster model and iTero Element 1 under mild and moderate crowding in maxillary dentition （mm，
$\bar x \pm s $ ）牙位 轻度拥挤组（n = 17） t P 中度拥挤组（n = 8） t P 11 0.125 ± 0.205 2.523 0.023* 0.176 ± 0.180 2.768 0.028* 12 0.039 ± 0.214 0.749 0.465 0.125 ± 0.203 1.740 0.125 13 −0.001 ± 0.250 −0.010 0.992 −0.048 ± 0.089 −1.514 0.174 14 0.030 ± 0.432 0.286 0.778 −0.066 ± 0.319 −0.587 0.575 15 0.350 ± 0.770 1.435 0.170 0.070 ± 0.240 1.111 0.303 16 −0.488 ± 0.554 −3.631 0.002* −0.470 ± 0.310 −2.392 0.048* 21 0.095 ± 0.175 2.251 0.039* 0.250 ± 0.240 1.890 0.101 22 −0.020 ± 0.268 −0.308 0.762 0.115 ± 0.272 1.195 0.271 23 0.074 ± 0.219 1.392 0.183 0.141 ± 0.164 2.440 0.045* 24 0.186 ± 0.530 1.452 0.166 0.096 ± 0.489 0.557 0.595 25 0.060 ± 0.730 0.239 0.814 −0.139 ± 0.276 −1.423 0.198 26 −0.471 ± 0.386 −5.035 < 0.001* −0.221 ± 0.313 −1.999 0.086 *P < 0.05。
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表 3 下颌牙列轻中度拥挤下石膏模型测量和iTero Element 1测量牙冠宽度差值（mm，
$\bar x \pm s $ ）Table 3. Difference of crown width measured by plaster model and iTero Element 1 under mild and moderate crowding in mandibular dentition （mm，
$\bar x \pm s $ ）牙位 轻度拥挤组（n = 16） t P 中度拥挤组（n = 10） t P 31 0.180 ± 0.180 3.367 0.004* 0.210 ± 0.310 1.908 0.089 32 0.020 ± 0.280 1.248 0.231 0.150 ± 0.220 1.751 0.114 33 0.030 ± 0.230 0.103 0.920 0.260 ± 0.140 1.126 0.289 34 0.010 ± 0.200 −0.425 0.677 0.040 ± 0.215 0.589 0.570 35 0.033 ± 0.391 0.339 0.739 −0.033 ± 0.125 −0.834 0.426 36 −0.202 ± 0.252 −2.996 0.010* −0.170 ± 0.200 −2.692 0.025* 41 0.176 ± 0.279 2.519 0.024* 0.046 ± 0.240 0.605 0.560 42 0.210 ± 0.330 2.957 0.010* 0.084 ± 0.367 0.725 0.487 43 0.010 ± 0.180 2.166 0.047* 0.153 ± 0.298 1.626 0.138 44 0.004 ± 0.293 0.060 0.953 0.049 ± 0.246 0.630 0.545 45 0.100 ± 0.250 0.247 0.808 0.051 ± 0.200 0.807 0.440 46 −0.140 ± 0.206 −2.454 0.030* −0.266 ± 0.391 −2.038 0.076 *P < 0.05。
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表 4 上颌牙轻中度拥挤下石膏模型测量和iTero Element 1测量牙弓宽度差值（mm，
$\bar x \pm s $ ）Table 4. Difference of arch width measured by plaster model and iTero Element 1 under mild and moderate crowding in maxillary dentition （mm，
$\bar x \pm s $ ）牙弓宽度 轻度拥挤组 t P 中度拥挤组 t P 13～23 0.138 ± 1.567 0.351 0.730 −0.850 ± 1.378 −1.744 0.125 14～24 −0.920 ± 0.900 −3.086 0.008* −0.690 ± 0.680 −2.615 0.040* 15～25 −1.393 ± 1.612 −3.234 0.007* −0.490 ± 0.440 −1.236 0.271 16～26 −0.220 ± 0.832 −1.024 0.323 0.100 ± 0.590 −0.894 0.401 *P < 0.05。
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表 5 下颌牙轻中度拥挤下石膏模型测量和iTero Element 1测量牙弓宽度差值（d牙弓宽度）（mm，
$\bar x \pm s $ ）Table 5. Difference of arch width measured by plaster model and iTero Element 1 under mild and moderate crowding in mandibular dentition （mm，
$\bar x \pm s $ ）牙弓宽度 轻度拥挤组 t P 中度拥挤组 t P 33～34 −0.188 ± 1.074 −0.698 0.496 −0.310 ± 0.470 −2.085 0.067 34～44 −0.380 ± 1.270 −4.172 < 0.001* −0.513 ± 1.089 −1.331 0.225 35～45 −0.540 ± 1.680 −1.796 0.093 −0.090 ± 0.824 −0.345 0.738 36～46 −1.360 ± 1.106 −4.764 < 0.001* −0.490 ± 0.550 −0.150 0.884 *P < 0.05。
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表 6 轻中度拥挤下石膏模型测量和iTero Element 1测量覆盖差值（d覆盖）（mm，
$\bar x \pm s $ ）Table 6. Difference of arch width measured by plaster model and iTero Element 1 under mild and moderate crowding in mandibular dentition （mm，
$\bar x \pm s $ ）牙位 轻度拥挤组（n = 17） t P 中度拥挤组（n = 8） t P 11 −0.550 ± 0.660 −1.245 0.231 −0.488 ± 0.490 −2.806 0.026* 12 −0.440 ± 0.710 −1.692 0.109 −0.550 ± 0.644 −2.413 0.046* 21 −0.570 ± 0.730 −1.017 0.324 −0.463 ± 0.741 −1.758 0.121 22 −0.610 ± 0.620 −3.637 0.002* −0.258 ± 0.768 −0.950 0.373 *P < 0.05。
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[1] 赵志河主编. 口腔正畸学[M]. 第7版. 北京: 北京人民卫生出版社, 2020: 54-172. [2] Su T S,Shu J. Intraoral digital impression technique: A review[J]. J Prosthodont,2015,24(4):313-321. doi: 10.1111/jopr.12218 [3] 葛峻沂,王佩佩,周鹏,等. iTero口腔数字化扫描软件在口腔正畸教学中的应用探索[J]. 科教导刊,2023,(12):88-90. [4] 程明轩,姜婷,孙玉春,等. 比较口内扫描和模型扫描对数字化牙列模型咬合定量分析的影响[J]. 北京大学学报(医学版),2018,50(1):136-140. [5] 游恺,张宁. 五种口内扫描仪模型扫描精度对比及扫描质量评估[J]. 口腔颌面修复学杂志,2023,24(4):259-265. [6] 郑小婉,刘金平,黄晓峰. 轻重度拥挤正畸模型手工测量和数字化测量的可靠性评价研究[J]. 临床口腔医学杂志,2021,37(7):395-399. [7] 游恺,张宁. 三种口内扫描仪精度的对比研究[J]. 口腔颌面修复学杂志,2023,24(2):87-92. [8] 张晖榕,尹乐锋,刘艳丽,等. 基于锥形术CT数字化建模的3D打印牙颌模型制作及精确度研究[J]. 华西口腔医学杂志,2018,36(2):156-161. [9] Kravitz N D,Groth C,Jones P E,et al. Intraoral digital scanners[J]. J Clin Orthod,2014,48(6):337-347. [10] Flugge T V,Schlager S,Nelson K,et al. Precision of intraoral digital dental impressions with iTero and extraoral digitization with the iTero and a model scanner[J]. Am J Orthod Dentofacial Orthop,2013,144(3):471-478. doi: 10.1016/j.ajodo.2013.04.017 [11] Zhang F,Suh K J,Lee K M. Validity of intraoral scans compared with plaster models: An in-vivo comparison of dental measurements and 3D surface analysis[J]. PLoS One,2016,11(6):e157713. [12] Leifert M F,Leifert M M,Efstratiadis S S,et al. Comparison of space analysis evaluations with digital models and plaster dental casts[J]. Am J Orthod Dentofacial Orthop,2009,136(1):16.e1-16. doi: 10.1016/j.ajodo.2009.05.002 [13] 杨雷宁,韩晓鹏,张萌萌,等. 牙颌数字化模型与石膏模型在线距和角度测量方面的准确性研究[J]. 口腔医学研究,2019,35(8):802-805. [14] 刘静. 口内扫描仪全牙列扫描精度及不同操作者间扫描精度差异的研究[D]. 济南: 山东大学, 2017. [15] Su T S,Sun J. Comparison of repeatability between intraoral digital scanner and extraoral digital scanner:An in-vitro study[J]. Journal of Prosthodontic Research,2015,59(4):236-242. [16] Liang Y M,Rutchakitprakarn L,Kuang S H,et al. Comparing the reliability and accuracy of clinical measurements using plaster model and the digital model system based on crowding severity[J]. J Chin Med Assoc,2018,81(9):842-847. doi: 10.1016/j.jcma.2017.11.011 [17] 谢轶伦,沈刚. 全口牙列口内扫描的精确性与可重复性分析[J]. 上海口腔医学,2016,25(5):593-599. [18] Kim J,Heo G,Lagravere M O. Accuracy of laser-scanned models compared to plaster models and cone-beam computed tomography[J]. Angle Orthod,2014,84(3):443-450. doi: 10.2319/051213-365.1 [19] Luu N S,Nikolcheva L G,Retrouvey J M,et al. Linear measurements using virtual study models[J]. Angle Orthod,2012,82(6):1098-1106. doi: 10.2319/110311-681.1 [20] Asquith J,Gillgrass T,Mossey P. Three-dimensional imaging of orthodontic models: A pilot study[J]. Eur J Orthod,2007,29(5):517-522. doi: 10.1093/ejo/cjm044 [21] Santoro M,Galkin S,Teredesai M,et al. Comparison of measurements made on digital and plaster models[J]. Am J Orthod Dentofacial Orthop,2003,124(1):101-105. doi: 10.1016/S0889-5406(03)00152-5 [22] McCann J,Burden D J. An investigation of tooth size in Northern Irish people with bimaxillary dental protrusion[J]. Eur J Orthod,1996,18(6):617-621. doi: 10.1093/ejo/18.6.617 [23] Yuzbasioglu E,Kurt H,Turunc R,et al. Comparison of digital and conventional impression techniques: evaluation of patients’ perception,treatment comfort,effectiveness and clinical outcomes[J]. BMC Oral Health,2014,14:10. doi: 10.1186/1472-6831-14-10 -
