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| Author(s): |
Ingrid Machado de Andrade
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Ribeirão Preto. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Odontologia de Ribeirão Preto (PCARP/BC) |
| Defense date: | 2011-05-16 |
| Examining board members: |
Helena de Freitas Oliveira Paranhos;
Izabel Cristina Froner;
Ana Lucia Machado;
Karina Matthes de Freitas Pontes;
Cláudia Helena Lovato da Silva
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| Advisor: | Helena de Freitas Oliveira Paranhos |
| Abstract | |
The aim of this study was to evaluate the efficacy of a castor bean solution (Ricinus communis) on denture biofilm removal in comparison with two proprietary products (sodium hypochlorite and alkaline peroxide). Fifty maxillary denture wearers were instructed to brush their dentures after meals and to soak them, once a day, for 07 days, in the following solutions: A - Control: saline (20 minutes). B- Polident alkaline peroxide (3 minutes). C - 1% sodium hypochlorite (20 minutes). D - castor oil solution (20 minutes). The participants soaked their dentures in every tested solution according to a randomized sequence. Biofilm was quantified preliminarily (baseline) and after using each product. For that purpose, the inner surfaces of maxillary dentures were disclosed (1% neutral red) and photographed (Nikon Coolpix 950, Nikon Corporation, Tokyo, Japan). Stained biofilm was quantified by Image Tool 3.0 software. Tested solutions were compared by Friedman test (α=.05) followed by the Wilcoxon test (with Bonferroni correction, α=.005). The results showed a significant difference between methods (Fr=51.67, P<.001). The castor bean solution (Ricinus communis) and the effervescent tablet showed intermediate results (Median: 1.0% and 1.5%, respectively) and the 1% sodium hypochlorite promoted the lowest biofilm percentage (Median: 0,0%). It was concluded that the castor bean solution (Ricinus communis) was effective on biofilm removal and therefore can be used as a denture cleanser. (AU) | |