上下颌轻中度拥挤下iTero Element 1口扫数字化模型的准确性

Accuracy of iTero Element 1 Intraoral Scanner Digital Model in Mild to Moderate Crowding of the Maxillary and Mandibular Arch

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。

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.