An In-Vitro Assessment of Operator Accuracy and Inter-Operator Agreement in Recording Shade and Shade Characteristics

Area of Science:

• Dental Materials Science
• Esthetic Dentistry
• Color Science

Background:

• Accurate color assessment is crucial in esthetic dentistry.
• Variability in operator background and lighting conditions impacts shade selection.
• Limited inter-operator agreement and accuracy are reported in dental shade assessment.

Purpose of the Study:

• To evaluate inter-operator agreement and accuracy in dental shade parameter assessment.
• To investigate the influence of operator background on shade assessment.
• To compare shade assessment under natural and color-corrected light conditions.

Main Methods:

• Twenty-four operators with diverse clinical backgrounds assessed three ceramic veneers.
• Shade parameters (value, hue, chroma) and characteristics (lustre, translucency, opacity) were evaluated.
• Assessments were conducted under natural and color-corrected light (Trueshade).

Main Results:

• Shade assessment accuracy was low (5.5% natural light, 9.7% Trueshade).
• Value and hue were mostly accurate, but chroma was frequently misidentified.
• Dental technicians demonstrated the highest accuracy; translucency was least accurately assessed.
• Inter-operator agreement improved with Trueshade, but agreement on shade characteristics varied.

Conclusions:

• Operators exhibit limited agreement and poor accuracy in dental shade and characteristic assessment.
• Clinical background significantly affects shade selection accuracy.
• Dental technicians are more reliable shade assessors.
• Trueshade shows potential as a tool to enhance dental shade assessment outcomes.