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In vitro evaluation of the whitening effect of mouth rinses containing hydrogen peroxide
Lima, Fábio Garcia; Rotta, Talita Aparecida; Penso, Sonara; Meireles, Sônia Saeger; Demarco, Flávio Fernando.
Affiliation
  • Lima, Fábio Garcia; Federal University of Pelotas. School of Dentistry. Department of Restorative Dentistry. Pelotas. BR
  • Rotta, Talita Aparecida; s.af
  • Penso, Sonara; s.af
  • Meireles, Sônia Saeger; Federal University of João Pessoa. School of Dentistry. Department of Restorative Dentistry. João Pessoa. BR
  • Demarco, Flávio Fernando; Federal University of Pelotas. School of Dentistry. Department of Restorative Dentistry. Pelotas. BR
Braz. oral res ; 26(3): 269-274, May-June 2012. tab
Article ي En | LILACS | ID: lil-622944
المكتبة المسؤولة: BR1.1
ABSTRACT
The aim of this study was to evaluate the bleaching effect of two mouth rinses containing hydrogen peroxide. Thirty premolars were randomly divided into two groups (n = 15) Listerine Whitening (LW) and Colgate Plax Whitening (PW). The teeth were fixed on a wax plate and with acrylic resin, at a distance of 5 mm between each other, exposing the buccal surfaces. All teeth were stored in artificial saliva for 45 days, being removed twice a day to be immersed for 1 min in each mouthwash, followed by 10-second washing in tap water. The pH of each product was measured. Digital images of each tooth were captured under standardized conditions. These images were cut in areas previously demarcated and analyzed in Adobe Photoshop 7.0 using the CIEL*a*b* color space system. Data were statistically analyzed by a paired t test and an independent samples t test (p < 0.05). The pH values were 5.6 and 3.4 for LW and PW, respectively. Both treatment groups showed a decrease in the b* parameter (p < 0.01), but a decrease of a* was observed only for PW (p < 0.01). While the LW group showed an improvement in lightness (L*) (p = 0.03), the PW group had a decrease in the L* parameter (p = 0.02). Within the limitations of this study, it is possible to conclude that both products caused some degree of whitening; however, extreme care should be taken when using Colgate Plax Whitening, since its decline in luminosity might be due to its lower pH.
الموضوعات
Key words

النص الكامل: 1 الفهرس: LILACS الموضوع الرئيسي: Tooth Bleaching / Tooth Bleaching Agents / Hydrogen Peroxide / Mouthwashes نوع الدراسة: Clinical_trials المحددات: Humans اللغة: En مجلة: Braz. oral res موضوع المجلة: ODONTOLOGIA السنة: 2012 نوع: Article

النص الكامل: 1 الفهرس: LILACS الموضوع الرئيسي: Tooth Bleaching / Tooth Bleaching Agents / Hydrogen Peroxide / Mouthwashes نوع الدراسة: Clinical_trials المحددات: Humans اللغة: En مجلة: Braz. oral res موضوع المجلة: ODONTOLOGIA السنة: 2012 نوع: Article