IADR Abstract Archives
Optical Properties of CAD-CAM Milling Materials Influenced by Cigarette Smoking
Objectives: CAD-CAM milling materials are becoming nowadays one of the main options for the esthetic rehabilitation of prosthetic patients. Choosing the right restoration material for a smoker patient could be a challenging task.
The objective of the study was to evaluate the influence of cigarette smoking on the optical properties of a group of CAD-CAM milling materials.
Methods: An in vitro study was conducted using samples of 1mm thickness (n=10) of two different CAD-CAM milling materials: feldspar ceramic (Vita Mark II- VM) and composite resin (Brilliant Coltene - BC) (A2 Shade).The samples were placed in a sealed cabin to mimic the act of smoking and exposed to the smoke of 1, 10, and respectfully 100 cigarettes. The lightness (L*), and color coordinates (a* and b*) of each sample were measured before and after each exposure, using a spectrophotometer (Vita Easyshade Advanced 4.0). The color difference ΔE00 was calculated, and the data were statistically analyzed and compared with the thresholds of perceptibility and acceptability PT00=0.8, AT00=1.8.
Results: The color differences after the exposure to the smoke of 1, 10, and 100 cigarettes were ΔE00 =0.4, 2.6, and respectively 15.5 units for BC and ΔE00 =0.2, 2.6 and respectively 12.4 units for VM. Even after 10 cigarettes, PT and AT have been exceeded.
Conclusions: The optical properties of the two CAD-CAM milling materials varied due to the exposure to smoke, with the color becoming darker, reddish, yellowish (decreasing of L*, increasing of a* and b*).
The objective of the study was to evaluate the influence of cigarette smoking on the optical properties of a group of CAD-CAM milling materials.
Methods: An in vitro study was conducted using samples of 1mm thickness (n=10) of two different CAD-CAM milling materials: feldspar ceramic (Vita Mark II- VM) and composite resin (Brilliant Coltene - BC) (A2 Shade).The samples were placed in a sealed cabin to mimic the act of smoking and exposed to the smoke of 1, 10, and respectfully 100 cigarettes. The lightness (L*), and color coordinates (a* and b*) of each sample were measured before and after each exposure, using a spectrophotometer (Vita Easyshade Advanced 4.0). The color difference ΔE00 was calculated, and the data were statistically analyzed and compared with the thresholds of perceptibility and acceptability PT00=0.8, AT00=1.8.
Results: The color differences after the exposure to the smoke of 1, 10, and 100 cigarettes were ΔE00 =0.4, 2.6, and respectively 15.5 units for BC and ΔE00 =0.2, 2.6 and respectively 12.4 units for VM. Even after 10 cigarettes, PT and AT have been exceeded.
Conclusions: The optical properties of the two CAD-CAM milling materials varied due to the exposure to smoke, with the color becoming darker, reddish, yellowish (decreasing of L*, increasing of a* and b*).