Clinical Tooth Color Matching: In Vivo Comparisons of Digital Photocolorimetric and Spectrophotometric Analyses.

Area of Science:

• Dental materials science
• Color science
• Clinical dentistry

Background:

• Accurate tooth color matching is crucial for aesthetic dental restorations.
• Traditional spectrophotometric analysis (SPM) provides objective color data.
• Digital photocolorimetric analysis (DPC) offers a potentially more accessible method.

Purpose of the Study:

• To compare the accuracy and reliability of DPC against SPM for tooth color determination.
• To evaluate the correlation between color coordinates obtained by both methods.

Main Methods:

• Sixty maxillary central incisors from 30 volunteers were analyzed using both DPC and SPM.
• Standardized digital photography and specialized software were used for DPC.
• A handheld spectrophotometer was employed for SPM measurements.
• Paired t-tests and Pearson correlation analyses were performed.

Main Results:

• Significant differences were found in L*, a*, and b* color coordinates between DPC and SPM (p<0.0001).
• The mean color difference (ΔEab) between the two methods was 11.5 ±3.1.
• Strong positive correlations were observed for L* (R²=0.73) and b* (R²=0.83) coordinates, and a moderate correlation for a* (R²=0.31).

Conclusions:

• Despite quantitative differences in color values, DPC and SPM demonstrate significant correlations.
• The findings support DPC as a viable and practical alternative for clinical tooth color assessment.
• Digital photocolorimetric analysis offers a promising approach for objective and accessible dental shade matching.