Full-arch accuracy of five intraoral scanners: In vivo analysis of trueness and precision
권미란, 조영목, 김동욱, 김명수, 김윤지, 장민호,
소속 상세정보
권미란 ( Kwon Mi-Ran ) - Korea University Graduate School of Clinical Dentistry Department of Orthodontics
조영목 ( Cho Young-Mok ) - Korea University School of Engineering Department of Mechanical Engineering
김동욱 ( Kim Dong-Wook ) - Korea University Graduate School of Clinical Dentistry Department of Orthodontics
김명수 ( Kim Myung-Su ) - Korea University Graduate School of Clinical Dentistry Department of Orthodontics
김윤지 ( Kim Yoon-Ji ) - University of Ulsan College of Medicine Asan Medical Center Department of Orthodontics
장민호 ( Chang Min-Ho ) - Korea University School of Engineering Department of Mechanical Engineering
Abstract
Objective: 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.
Methods: 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.
Results: 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.
Conclusions: 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.
키워드
Digital impression; Intraoral scanner; Precision; Trueness
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