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Fig. 3 | BMC Oral Health

Fig. 3

From: Efficiency of tooth bleaching agent on staining and discoloration characteristics of nicotine stained dental enamel model

Fig. 3

Representative absorbance spectra of tooth bleaching formulae set #2 (L1.0 + CD20) on the stained dental enamel model before and after the tooth bleaching treatment under (a) NT6, (b) NT11, (c) NT16, and (d) NT21 representing the nicotine content in 6, 11, 16, and 21 mg/mL, respectively. L, CD, and CP represented limonene, coconut diethanolamide, and carbamide peroxide, respectively

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BMC Oral Health

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