IADR Abstract Archives
Impact of Scanning Distance on Trueness and Precision of Intra-Oral Scanners
Objectives: It is now impossible to ignore the influence that intraoral scanners have on dental practices. Our study aimed to examine whether there is a variety of distances where scanning offers higher trueness and precision.
Methods: : A right first mandibular molar with overlay preparation on the typodont model was scanned by intra-oral scanners (IOS): BenQ BIS-1 (BenQ AB), VirtuoVivo (Dental Wings), and TRIOS 3 (3Shape). Scanning was performed six times at a distance of 5mm, 10mm, 11mm, 12mm, and 13mm with each IOS by a single operator. The reference model was obtained by a desktop scanner (Trishape E4). Scan data was exported as stereolithography files and uploaded to control software (CloudCompare V2.12.4). The software performed point pair alignment and fine registration of prepared tooth surfaces with the reference model. Following alignment, the trueness and accuracy data were obtained by calculating the deviation between the IOS data and the reference model by the software. The statistical effect of scanning distance and IOS on trueness and accuracy was investigated (p<0.05).
Results: The scanning distance of 5,10, 11, and 12mm displayed statistically different deviation values for BenQ BIS-1 and VirtuoVivo for trueness (p<0.05). However, 10,11, and 12mm distances significantly affected the precision of BenQ BIS-1, not VirtuoVivo and Trios. For Trios3, there was no significant difference in the trueness and precision of scanning in all distances (p>0.05). While Trios 3 showed the highest trueness within all distances except 13mm, BenQ was more precise at 10, 11, and 12mm among intra-oral scanners except 5 and 13mm, which is no significant difference.
Conclusions: Scanning distance can be an influential factor in the trueness and precision of intra-oral scanners, especially the ones evaluated in this study, except for Trios3.
Methods: : A right first mandibular molar with overlay preparation on the typodont model was scanned by intra-oral scanners (IOS): BenQ BIS-1 (BenQ AB), VirtuoVivo (Dental Wings), and TRIOS 3 (3Shape). Scanning was performed six times at a distance of 5mm, 10mm, 11mm, 12mm, and 13mm with each IOS by a single operator. The reference model was obtained by a desktop scanner (Trishape E4). Scan data was exported as stereolithography files and uploaded to control software (CloudCompare V2.12.4). The software performed point pair alignment and fine registration of prepared tooth surfaces with the reference model. Following alignment, the trueness and accuracy data were obtained by calculating the deviation between the IOS data and the reference model by the software. The statistical effect of scanning distance and IOS on trueness and accuracy was investigated (p<0.05).
Results: The scanning distance of 5,10, 11, and 12mm displayed statistically different deviation values for BenQ BIS-1 and VirtuoVivo for trueness (p<0.05). However, 10,11, and 12mm distances significantly affected the precision of BenQ BIS-1, not VirtuoVivo and Trios. For Trios3, there was no significant difference in the trueness and precision of scanning in all distances (p>0.05). While Trios 3 showed the highest trueness within all distances except 13mm, BenQ was more precise at 10, 11, and 12mm among intra-oral scanners except 5 and 13mm, which is no significant difference.
Conclusions: Scanning distance can be an influential factor in the trueness and precision of intra-oral scanners, especially the ones evaluated in this study, except for Trios3.