Determination of the Color Change of Various Esthetic Monolithic Monochromatic Computer-Aided Design/Computer-Aided...

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Esthetic Dentistry

Background:

• Modern dental prosthetics utilize CAD/CAM materials for durability and aesthetics.
• Some advanced dental materials exhibit poor color stability when exposed to external factors.
• Understanding discoloration factors is crucial for long-term prosthetic success.

Purpose of the Study:

• To quantify and compare the color change (∆E₀₀) in various esthetic monolithic CAD/CAM materials.
• To assess the impact of thermocycling and common staining solutions (black tea, coffee, red wine) on material color.
• To evaluate how exposure time influences the degree of discoloration.

Main Methods:

• Five CAD/CAM materials were tested: nanoceramic, lithium disilicate, polymer, composite, and polymer-infiltrated ceramic.
• Specimens underwent thermocycling followed by four weeks of storage in staining solutions or distilled water.
• Color parameters were measured using a spectrophotometer against white and black backgrounds.

Main Results:

• All tested CAD/CAM materials showed some degree of discoloration.
• Red wine was identified as the most potent staining agent among the tested solutions.
• Discoloration varied significantly based on material type, staining agent, sample thickness, background color, and aging duration.

Conclusions:

• The color stability of esthetic monolithic CAD/CAM materials is influenced by multiple factors.
• Material selection, environmental exposure, and aging are critical considerations for maintaining prosthetic aesthetics.
• Further research may focus on developing more color-stable CAD/CAM materials.