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In vivo study for tooth colour determination-visual versus digital.

Jan Brandt1,2, Shirley Nelson3,4, Hans-Christoph Lauer3,4

  • 1Department of Prosthodontics, Hospital for Dental, Oral and Orthodontic Medicine (Carolinum), Johann Wolfgang Goethe-University Frankfurt am Main, Frankfurt, Germany. brandt@med.uni-frankfurt.de.

Clinical Oral Investigations
|March 8, 2017
PubMed
Summary

Digital intra-oral scanners offer a promising alternative for accurate tooth color determination in dental restorations. The Trios®Color scanner demonstrated superior performance compared to traditional visual methods, aligning with clinical acceptability standards.

Keywords:
Intra-oral scannerShade guideShade matchingSpectrophotometerTooth colourVisual

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Area of Science:

  • Restorative Dentistry
  • Digital Dentistry
  • Color Science

Background:

  • Accurate tooth color determination is crucial for aesthetic outcomes in dental restorations.
  • Conventional visual methods present challenges in achieving consistent and objective color matching.
  • Advancements in digital technology offer potential improvements for tooth color assessment.

Purpose of the Study:

  • To compare the clinical suitability of visual tooth color determination with digital methods.
  • To evaluate the accuracy and reliability of the Trios®Color intra-oral scanner against established techniques.
  • To assess the role of digital tools in modern dental workflows.

Main Methods:

  • Tooth color of 107 subjects' central incisors was assessed visually (dentist and dental technician) and digitally (VITA Easyshade Advance 4.0 and Trios®Color intra-oral scanner).
  • Digital measurement reliability was verified through repeated assessments.
  • Analysis utilized 3D-MASTER values and L*a*b/L*C*h parameters.

Main Results:

  • The Trios®Color scanner achieved a measuring accuracy of 43.9%, surpassing visual methods (dentist 35.5%, dental technician 34.6%).
  • All methods yielded color differences within the clinically acceptable range (ΔE ≤ 6.8).
  • The intra-oral scanner demonstrated high repeatability (78.3%), comparable to the reference spectrophotometer (76.6%).

Conclusions:

  • The Trios®Color intra-oral scanner is a viable alternative to conventional visual tooth color determination.
  • Digital scanning technology provides improved accuracy and consistency over visual assessment.
  • Digital tools are essential for the ongoing digitalization of dental practices.