TY - JOUR
T1 - A comparison of the precision of three-dimensional images acquired by 2 digital intraoral scanners
T2 - Effects of tooth irregularity and scanning direction
AU - Anh, Ji Won
AU - Park, Ji Man
AU - Chun, Youn Sic
AU - Kim, Miae
AU - Kim, Minji
N1 - Publisher Copyright:
© 2016 The Korean Association of Orthodontists.
PY - 2016/1
Y1 - 2016/1
N2 - Objective: The purpose of this study was to compare the precision of three-dimensional (3D) images acquired using iTero® (Align Technology Inc., San Jose, CA, USA) and Trios® (3Shape Dental Systems, Copenhagen, Denmark) digital intraoral scanners, and to evaluate the effects of the severity of tooth irregularities and scanning sequence on precision. Methods: Dental arch models were fabricated with differing degrees of tooth irregularity and divided into 2 groups based on scanning sequence. To assess their precision, images were superimposed and an optimized superimposition algorithm was employed to measure any 3D deviation. The t-test, paired t-test, and one-way ANOVA were performed (p < 0.05) for statistical analysis. Results: The iTero® and Trios® systems showed no statistically significant difference in precision among models with differing degrees of tooth irregularity. However, there were statistically significant differences in the precision of the 2 scanners when the starting points of scanning were different. The iTero® scanner (mean deviation, 29.84 ± 12.08 mm) proved to be less precise than the Trios®scanner (22.17 ± 4.47 mm). Conclusions: The precision of 3D images differed according to the degree of tooth irregularity, scanning sequence, and scanner type. However, from a clinical standpoint, both scanners were highly accurate regardless of the degree of tooth irregularity.
AB - Objective: The purpose of this study was to compare the precision of three-dimensional (3D) images acquired using iTero® (Align Technology Inc., San Jose, CA, USA) and Trios® (3Shape Dental Systems, Copenhagen, Denmark) digital intraoral scanners, and to evaluate the effects of the severity of tooth irregularities and scanning sequence on precision. Methods: Dental arch models were fabricated with differing degrees of tooth irregularity and divided into 2 groups based on scanning sequence. To assess their precision, images were superimposed and an optimized superimposition algorithm was employed to measure any 3D deviation. The t-test, paired t-test, and one-way ANOVA were performed (p < 0.05) for statistical analysis. Results: The iTero® and Trios® systems showed no statistically significant difference in precision among models with differing degrees of tooth irregularity. However, there were statistically significant differences in the precision of the 2 scanners when the starting points of scanning were different. The iTero® scanner (mean deviation, 29.84 ± 12.08 mm) proved to be less precise than the Trios®scanner (22.17 ± 4.47 mm). Conclusions: The precision of 3D images differed according to the degree of tooth irregularity, scanning sequence, and scanner type. However, from a clinical standpoint, both scanners were highly accurate regardless of the degree of tooth irregularity.
KW - Dental cast analysis
KW - Digital models
KW - Three-dimensional diagnosis and treatment planning
KW - Three-dimensional scanner
UR - http://www.scopus.com/inward/record.url?scp=84955472131&partnerID=8YFLogxK
U2 - 10.4041/kjod.2016.46.1.3
DO - 10.4041/kjod.2016.46.1.3
M3 - Article
AN - SCOPUS:84955472131
SN - 2234-7518
VL - 46
SP - 3
EP - 12
JO - Korean Journal of Orthodontics
JF - Korean Journal of Orthodontics
IS - 1
ER -