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The acids of Citrus limon is believed to be able to brighten teeth, meanwhile whitening toothpaste is able to remove stain of the teeth. The purpose of this study was to observe the effect of Citrus limon water and whitening toothpaste to teeth color changes. Fifteen female students of Dentistry Faculty of Trisakti University, participated in this study (ethical clearance). The color of right maxillary central incisor of those participant was measured by spectrophotometer (VITA Easyshade V, USA) for 3 weeks respectively. The color measurement was divided into 4 treatments: before treatment; brushed with whitening toothpaste for 28 minutes + 42 drops of Citrus limon; brushed with whitening toothpaste for 56 minutes + 84 drops of Citrus limon; brushed with whitening toothpaste for 84 minutes + 126 drops of Citrus limon. The results of color change are: ΔE1 (+1.4 ± 1.3), ΔE2 (+1.2 ± 1.3), ΔE3 (+1.6 ± 1.5). Results of lightness are ΔL1 (+1.2 ± 1.8), ΔL2 (+0.580 ± 2.1), ΔL3 (+0.7 ± 2.0). Results of chroma are ΔC1 (+1.0 ± 1.3), ΔC2 (+0.7 ± 1.2), ΔC3 (+1.1 ± 1.8). Results of hue are ΔH1 (-0.7 ± 0.9), ΔH2 (-0.4 ± 1.7), ΔH3 (0.2 ± 1.9). The data were analyzed with repeated anova. In this study, the total measurement of color change was showed by decreasing value of ΔE. The color of their teeth get brighter during the 3 weeks application. Statistical tests show significant differences of ΔE (p<0.05). The malic acid in Citrus limon and abrasive ingredients in whitening toothpaste are able to brighten the color of their teeth. Keywords–Citrus limon, whitening toothpaste, color

The Effect of Citrus Limon and Whitening Toothpaste to Teeth Color Changes ( Study on the Right Maxillary Central Incisor of 18 Year Old Female)