Clinical comparison of different color selection methods with digital photographs using a button technique

Area of Science:

• Dental Aesthetics
• Color Science in Dentistry
• Digital Imaging in Dentistry

Background:

• Accurate tooth color selection is crucial for successful aesthetic dental restorations.
• Conventional visual shade matching methods often suffer from subjectivity and poor agreement.
• Digital tools offer potential improvements in objectivity and accuracy for color assessment.

Purpose of the Study:

• To compare the intra- and interobserver agreement of postgraduate students in selecting tooth color.
• To evaluate various conventional (VITA Classical, VITA 3D) and digital (VITA Easyshade V, Canon D80) tools.
• To assess the efficacy of digital photography with specific image manipulations (E1, D1, E2, D2) using the button technique.

Main Methods:

• Four postgraduate students performed color selection on 32 patients' maxillary central incisors.
• Visual selection used VITA Classical (VC) and VITA 3D (V3D) scales.
• Digital selection involved VITA Easyshade V, Canon D80 camera, and image processing techniques (E1, D1, E2, D2) applied to original digital photographs captured using the button technique.

Main Results:

• Poor to moderate intraobserver agreement was found for conventional methods (VC-V3D, VC-VE, V3D-VE).
• Good intraobserver agreement was achieved for digital evaluations based on original photographs (E1, E2).
• Interobserver agreement was good for photograph evaluations but poor for other methods.

Conclusions:

• The button technique combined with original digital photographs provides reliable intraobserver agreement for tooth color selection in the aesthetic region.
• Digital dental photography is essential for enhancing the accuracy of clinical tooth color selection.
• This digital approach offers a promising alternative to conventional methods, improving consistency and predictability in shade matching.