Dehydration Time Effect on Tooth Color Measurement: An In Vitro Study

Area of Science:

• Dental Materials Science
• Esthetic Dentistry
• Colorimetry

Background:

• Patient satisfaction in dentistry is increasingly linked to esthetics.
• Accurate shade selection of dental restorations is vital for mimicking natural teeth.
• Tooth dehydration is a common occurrence during dental procedures, potentially affecting color measurements.

Purpose of the Study:

• To evaluate the impact of varying dehydration times on tooth color measurements.
• To assess the reliability of spectrophotometric shade selection under dehydration conditions.

Main Methods:

• Twenty caries-free maxillary central incisors were used.
• Color measurements were taken using a VITA Easyshade Advance 4.0 spectrophotometer.
• Measurements were recorded at baseline, 1 hour, and 2 hours post-dehydration across cervical, middle, and incisal thirds.

Main Results:

• Statistically significant changes in color difference (ΔE) were observed across all dehydration intervals (p < 0.001).
• Hue showed significant changes between 1 and 2 hours of dehydration (p = 0.002).
• Chroma values also demonstrated significant changes throughout the dehydration periods (p < 0.001).

Conclusions:

• Tooth color measurements are significantly influenced by dehydration duration.
• Dehydration causes teeth to appear lighter due to altered refractive indices.
• Prompt color measurements are recommended to minimize dehydration effects and ensure accurate shade selection for optimal esthetics.