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Antioxidant activity by DPPH assay of potential solutions to be applied on bleached teeth
Garcia, Eugenio José; Oldoni, Tatiane Luiza Cadorin; Alencar, Severino Matias de; Reis, Alessandra; Loguercio, Alessandro D; Grande, Rosa Helena Miranda.
  • Garcia, Eugenio José; University of São Paulo. Dental School. Department of Dental Materials. São Paulo. BR
  • Oldoni, Tatiane Luiza Cadorin; University of São Paulo. Luiz de Queiroz College of Agriculture. Department of Agri-Food Industry, Food and Nutrition. Piracicaba. BR
  • Alencar, Severino Matias de; University of São Paulo. Luiz de Queiroz College of Agriculture. Department of Agri-Food Industry, Food and Nutrition. Piracicaba. BR
  • Reis, Alessandra; State University of Ponta Grossa. Dental School. Department of Restorative Dentistry. Ponta Grossa. BR
  • Loguercio, Alessandro D; State University of Ponta Grossa. Dental School. Department of Restorative Dentistry. Ponta Grossa. BR
  • Grande, Rosa Helena Miranda; University of São Paulo. Dental School. Department of Dental Materials. São Paulo. BR
Braz. dent. j ; 23(1): 22-27, 2012. tab
Article in English | LILACS | ID: lil-618000
ABSTRACT
The aim of this study was to assess, using the DPPH assay, the antioxidant activity of several substances that could be proposed to immediately revert the problems caused by bleaching procedures. The percentage of antioxidant activity (AA percent) of 10 percent ascorbic acid solution (AAcidS), 10 percent ascorbic acid gel (AAcidG), 10 percent sodium ascorbate solution (SodAsS), 10 percent sodium ascorbate gel (SodAsG), 10 percent sodium bicarbonate (Bicarb), Neutralize® (NE), Desensibilize® (DES), catalase C-40 at 10 mg/mL (CAT), 10 percent alcohol solution of alpha-tocopherol (VitE), Listerine® (LIS), 0.12 percent chlorhexidine (CHX), Croton Lechleri (CL), 10 percent aqueous solution of Uncaria Tomentosa (UT), artificial saliva (ArtS) and 0.05 percent sodium fluoride (NaF) was assessed in triplicate by 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) free radical assay. All substances exhibited antioxidant activity, except for CL. AAcidS, AAcidG and VitE exhibited the highest AA percent (p<0.05). On the contrary, CHX, NE, LIS and NaF showed the lowest AA percent (p<0.05). In conclusion, AAcidS, AAcidG, SodAsS, SodAsG and VitE presented the highest antioxidant activity among substances tested in this study. The DPPH assay provides an easy and rapid way to evaluate potential antioxidants.
RESUMO
O objetivo deste estudo foi avaliar, por meio do DPPH, a atividade antioxidante de substâncias que poderiam ser propostas para reverter de imediato os problemas causados pelos procedimentos de clareamento. A porcentagem de atividade antioxidante (AA por cento) da solução de acido ascórbico 10 por cento (AAcidS), gel de ácido ascórbico a 10 por cento (AAcidG), solução de ascorbato de sódio 10 por cento (SodAsS), gel de ascorbato de sódio 10 por cento (SodAsG), bicarbonato de sódio 10 por cento (Bicarb), Neutralize® (NE), Desensibilize® (DES), catalase C-40 10 mg/mL (CAT), solução alcoólica 10 por cento de alfa-tocoferol (VitE), Listerine® (LIS), clorexidina 0,12 por cento (CHX), CrotonLechleri (CL), solução aquosa 10 por cento de Uncaria Tomentosa (UT), saliva artificial (ArtS) e fluoreto de sódio 0,05 por cento (NaF) foi avaliada em triplicata pelo teste de radicais livres 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH). Todas as substâncias apresentaram atividade antioxidante, exceto a CL. AAcidS, AAcidG e VitE mostraram os maiores valores de AA por cento (p<0,05). Por outro lado, CHX, NE, LIS e NaF mostraram os valores mais baixos de AA por cento (p<0,05). Em conclusão, AAcidS, AAcidG, SodAsS, SodAsG e VitE apresentaram os mais altos valores de atividade antioxidante entre as substâncias testadas. O teste DPPH é um método rápido e fácil para avaliar o potencial antioxidante.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Picrates / Tooth Bleaching / Biphenyl Compounds / Free Radical Scavengers / Antioxidants Limits: Humans Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2012 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: State University of Ponta Grossa/BR / University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Picrates / Tooth Bleaching / Biphenyl Compounds / Free Radical Scavengers / Antioxidants Limits: Humans Language: English Journal: Braz. dent. j Journal subject: Dentistry Year: 2012 Type: Article / Project document Affiliation country: Brazil Institution/Affiliation country: State University of Ponta Grossa/BR / University of São Paulo/BR