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- Low toxic effects of a whitening strip to cultured pup cells
- Universidade Estadual Paulista (UNESP)
- Universidade de Brasília (UnB)
- Fundacao de Amparo a Pesquisa do Estado de sao Paulo (FAPESP)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- FAPESP: 2011/12938-8
- FAPESP: 2011/09385-7
- CNPq: 301029/2010-1
- To assess the trans-enamel and trans-dentin toxicity of a 10% hydrogen peroxide (HP) whitening strip to odontoblast-like cells (MDPC-23). Methods: Enamel surfaces of enamel/dentin discs adapted to artificial pulp chambers were subjected to two 30-minute whitening strip applications to obtain indirect extracts (DMEM + bleaching components that diffused across enamel and dentin). The extracts were applied for 1 hour to the cells for 1 or 5 days. A bleaching gel with 35% HP was used as the positive control. Cell viability (MTT assay) and morphology (SEM) as well as the quantity of HP in the extracts were assessed. Results: Discrete cell viability reduction (21.9%) associated with slight alterations in cell morphology occurred after application of the extracts for 5 days to the MDPC-23 cells (Tukey's test; P< 0.05). Lower enamel/dentin diffusion of HP was observed after the use of the whitening strip compared with the bleaching gel (Mann-Whitney; P< 0.05).
- American Journal of Dentistry, v. 26, p. 283-285, 2013.
- Randomized clinical-trial
- Bleaching gel
- Peroxide penetration
- Carbamide peroxide
- Mdpc-23 cells
- Acesso restrito
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