Evaluating a Cobalt-Tetraphenylporphyrin Complex, Functionalized with a Reduced Graphene Oxide Nanocomposite, for Improved Tooth Whitening

doi:10.1111/jerd.12240

CNU IR > Pharmacy and Science > Dept. of Food & Drug Industry and Inspective Technology > Periodical Articles > Item 310902800/31066

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/31066

Title:	Evaluating a Cobalt-Tetraphenylporphyrin Complex, Functionalized with a Reduced Graphene Oxide Nanocomposite, for Improved Tooth Whitening
Authors:	Su, I-Hsuan Lee, Chen-Fu Su, Yu-Pin Wang, Lai-Hao
Contributors:	Natl Taiwan Univ Hosp, Dept Orthodont Yang An Dent Clin Chia Nan Univ Pharm & Sci, Dept Med Chem
Keywords:	hydrogen-peroxide penetration in-vitro green synthesis nanoparticles h2o2 enamel light hydroxyapatite activation composite
Date:	2016-09
Issue Date:	2018-01-18 11:40:58 (UTC+8)
Publisher:	Wiley-Blackwell
Abstract:	ObjectivesTo study using cobalt-tetraphenylporphyrin/reduced graphene oxide (CoTPP/RGO), a nanocomposite highly catalytic both for oxidizing and for reducing hydrogen peroxide (H2O2), to whiten teeth. MethodsDyes (D&C Red 34, Orange No. 4), tea, and betel nuts (Areca catechu) were used to stain the tooth specimens for three days and subsequently bleached using H2O2 alone, H2O2 plus CoTPP, or H2O2 plus CoTPP/RGO for 0.5-70 hours. The process was photographed using an electronic chromometer and a camera. Color change was assessed after each session. The results of bleaching teeth with and without photoirradiation were compared. ResultsCoTPP/RGO increased the tooth-whitening efficacy of H2O2 for specimens stained with dyes, tea, and betel nuts. Using lamps (photoactivation) (wavelengths: 254 nm and 310 nm) to catalyze the H2O2 bleaching agent reduced the bleaching treatment time. CLINICAL SIGNIFICANCEFirst, the Co/TPP/RGO complex allows improved tooth bleaching and shorter treatment times. Second, because the Co/TPP/RGO complex bleached D&C Red 34 at a similar rate and to a similar degree as tea and other natural agents stain teeth, it is a convenient staining agent for studying many vital aspects of tooth bleaching. (J Esthet Restor Dent 28:321-329, 2016)
Relation:	Journal of Esthetic and Restorative Dentistry, v.28 n.5, pp.321-329
Appears in Collections:	[Dept. of Food & Drug Industry and Inspective Technology] Periodical Articles

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