Kwon Miran, Cho Youngmok, Kim Dong-Wook, Kim MyungSu, Kim Yoon-Ji, Chang Minho
Department of Orthodontics, Korea University Graduate School of Clinical Dentistry, Seoul, Korea.
Department of Mechanical Engineering, Korea University School of Engineering, Seoul, Korea.
Korean J Orthod. 2021 Mar 25;51(2):95-104. doi: 10.4041/kjod.2021.51.2.95.
To evaluate the trueness and precision of full-arch scans acquired using five intraoral scanners and investigate the factors associated with the dimensional accuracy of the intraoral scan data.
Nine adult participants (mean age, 34.3 ± 8.3 years) were recruited. Four zirconium spheres (Ø 6 mm) were bonded to the canines and the molars. Following acquisition of reference scans using an industrial-grade scanner, five intraoral scanners, namely i500, CS3600, Trios 3, iTero, and CEREC Omnicam, were used to scan the arches. Linear distances between the four reference spheres were automatically calculated, and linear mixed model analysis was performed to compare the trueness and precision of the intraoral scan data among the different scanners.
The absolute mean trueness and precision values for all intraoral scanners were 76.6 ± 79.3 and 56.6 ± 52.4 μm, respectively. The type of scanner and the measured linear distances had significant effects on the accuracy of the intraoral scan data. With regard to trueness, errors in the intermolar dimension and the distance from the canine to the contralateral molar were greater with Omnicam than with the other scanners. With regard to precision, the error in the linear distance from the canine to the molar in the same quadrant was greater with Omnicam and CS3600 than with the other scanners.
The dimensional accuracy of intraoral scan data may differ significantly according to the type of scanner, with the amount of error in terms of trueness being clinically significant.
评估使用五款口内扫描仪获取的全牙弓扫描的准确性和精密度，并研究与口内扫描数据尺寸精度相关的因素。
招募了9名成年参与者（平均年龄34.3±8.3岁）。将四个锆球（直径6毫米）粘结到犬齿和磨牙上。使用工业级扫描仪获取参考扫描后，使用五款口内扫描仪，即i500、CS3600、Trios 3、iTero和CEREC Omnicam，对牙弓进行扫描。自动计算四个参考球之间的线性距离，并进行线性混合模型分析，以比较不同扫描仪之间口内扫描数据的准确性和精密度。
所有口内扫描仪的绝对平均准确性和精密度值分别为76.6±79.3微米和56.6±52.4微米。扫描仪类型和测量的线性距离对口内扫描数据的准确性有显著影响。在准确性方面，Omnicam扫描仪在磨牙间尺寸以及从犬齿到对侧磨牙的距离上的误差比其他扫描仪更大。在精密度方面，Omnicam和CS3600扫描仪在同一象限中从犬齿到磨牙的线性距离误差比其他扫描仪更大。
口内扫描数据的尺寸精度可能因扫描仪类型而有显著差异，准确性方面的误差量在临床上具有重要意义。
