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Effect on the Externally Stained IPS e.max Press Porcelain Due to Tooth Brushing  

Park, Chan (Department of Prosthodontics, College of Dentistry, Chosun University)
Lee, Gyeong-Je (Department of Dentistry, Yonsei University Wonju College of Medicine)
Kim, Hee-Jung (Department of Prosthodontics, College of Dentistry, Chosun University)
Publication Information
Journal of Dental Rehabilitation and Applied Science / v.28, no.2, 2012 , pp. 213-221 More about this Journal
Abstract
The purpose of this study was to evaluate the stability of external stain that long term attrition caused by tooth brushing affected the color variation of external stain of IPS e.max Press Porcelain. The specimen was made by IPS e.max Press LT ingots, and treated the shade of external staning as Orange, A, B, C, D After conducting horizontal toothbrush strokes about 11,000 / 22,000 / 44,000 / 66,000 / 88,000, Color changers of the external stained layer was measured with SpectroShade$^{tm}$ MICRO(MHT, Italy). The result of this study was obtained as follows: 1. After 11,000 strokes, the color changes of shade were greater in Orange shade than the other 4 shade groups. And even though toothbrush strokes were increased until 88,000, there were no statistical significant color changes about the external stain shade variation. 2. The amount of color variation about increasing of toothbrushing strokes was irregular(no consistent increasing, or decreasing), and it was no statistical significant changes According to these results, the long term tooth-brushing doesn't affect the changes of external stain about IPS e.max press porcelain. And it doesn't reduce the stability of external stain clinically. Later, it will be needed to study other factors affecting the external stain.
Keywords
external stain; tooth brushing;
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