IADR Abstract Archives

Accuracy of Intraoral Scanners on Shade Determination

Objectives: To evaluate the shade matching function of two intraoral scanners (3Shape TRIOS 3- TRI3 and CEREC Primescan- PS) in comparison to the dental spectrophotometer Vita EasyShade V (ESV).
Methods: Thirty students aged 18-25 from the Faculty of Odonto-Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City participated in this study. For each subject, twenty teeth (all anterior and premolar teeth of both jaws) were measured at the cervical, middle, and incisal/ occlusal third both directly with ESV and indirectly via 3D images with TRI3 and PS. Shade matching results were recorded in Vita Classical (VC), Vita 3D Master (V3DM) shade guides, and CIEL*a*b* value. Due to TRI3 and PS only provide result in VC and V3DM, CIEL*a*b*-VC and CIEL*a*b*-V3DM conversion tables were used to get CIEL*a*b* value. Color difference (ΔE) between each pair was calculated using CIE76 formula with ΔE ≥ 2.7 as visual threshold. Data were statistically analyzed using SPSS 20.0 (IBM Corporation, USA).
Results: 1800 data points were collected. At each data point, we paired the result of ESV with each intraoral scanner (TRI3 and PS) thus making total 7200 pairs for comparison. Comparing CIEL*a*b* value between TRI3-ESV and PS-ESV at each point, there was a significant color difference with mean ΔE = 25.76 ± 6.76 (only 1 point is below the visual threshold). The shade matching result using shade guides showed that: both TRI3 and PS shared a slight agreement (Kappa <0.2) when comparing with ESV.
Conclusions: Within the limit of this study, the shade determination methods of the two particular intraoral scanners (TRI3 and PS) were less accurate comparing to a dental spectrophotometer (ESV). Therefore, we recommend that shade matching result of TRI3 and PS should not be used in clinician-technician communication.

2021 South East Asian Division Meeting (Hong Kong)
Hong Kong
2021
052
Dental Materials 7: Color and Appearance (Esthetics)
  • Phi, Hung  ( Faculty of Odonto - Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City , Ho Chi Minh City , Viet Nam )
  • Do, Loan  ( Faculty of Odonto - Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City , Ho Chi Minh City , Viet Nam )
  • Nguyen, Khoa  ( Faculty of Odonto - Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City , Ho Chi Minh City , Viet Nam )
  • Hoang, Hung  ( Faculty of Odonto - Stomatology, University of Medicine and Pharmacy at Ho Chi Minh City , Ho Chi Minh City , Viet Nam )
  • NONE
    Poster Session
    Dental materials and biomaterials II
    Wednesday, 12/08/2021 , 12:00PM - 01:00PM