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Master's Dissertation
DOI
https://doi.org/10.11606/D.58.2003.tde-29012024-111043
Document
Author
Full name
Beatriz Medina Coeli Barbosa
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2003
Supervisor
Committee
Nelson Filho, Paulo (President)
Ito, Izabel Yoko
Pizzolitto, Elisabeth Loshchagin
Title in Portuguese
Avaliação da contaminação microbiana e eficácia de agentes antimicrobianos na desinfecção de escovas dentais de pacientes portadores de necessidades especiais
Keywords in Portuguese
Desinfecção
Escovas dentais
Estreptococos do grupo mutans
Pacientes portadores de necessidades especiais
Abstract in Portuguese
O objetivo do presente estudo foi avaliar, por meio das técnicas de cultura e de formação de biofilme, a contaminação microbiana de escovas dentais de 39 indivíduos portadores de necessidades especiais e a eficácia de dois agentes antimicrobianos para desinfecção das mesmas. Os procedimentos clínicos foram divididos em três etapas, com intervalo de 72-96 horas entre cada uma. Na primeira etapa, os pacientes portadores de necessidades especiais efetuaram a escovação usando dentifrício Sorriso, enxaguaram as escovas com água e, em seguida, as mesmas foram borrifadas com spray de água de torneira esterilizada. Na segunda e terceira etapas, a escovação foi realizada usando o mesmo dentifrício e as escovas foram borrifadas com gluconato de clorexidina a 0,12% (Periogard-Colgate) e cloreto de cetilpiridínio a 0,05% (Anti-séptico bucal Reach Johnson), respectivamente. Ao término de cada etapa, as escovas foram submetidas à cultura microbiana, empregando-se o meio casa B. Os resultados obtidos foram submetidos à análise estatística por meio dos testes de Friedman, Dunn, Cochran e teste dos sinais. Na etapa I (água de torneira esterilizada), os estreptococos do grupo mutans estavam presentes em 76,9% das cerdas das escovas, com número de colônias/biofilmes variando de 0 a + 100. Na etapa II (gluconato de clorexidina a 0,12%) não se observou colonização por estreptococos do grupo mutans. Na etapa III (cloreto de cetilpiridínio a 0,05%), apenas 10,2% das escovas encontraram-se contaminadas por estreptococos do grupo mutans, com números de colônias/biofilmes variando de 1 a 31. Pode-se concluir que as cerdas das escovas dentais de pacientes portadores de necessidades especiais tornaram-se contaminadas por estreptococos do grupo mutans, após uma única escovação de 1 minuto. Para reduzir a contaminação das escovas dentais por esses microrganismos, tanto a solução à base de gluconato de clorexidina a 0,12% , quanto a solução à base de cloreto de cetilpiridínio a 0,05%, sob a forma de spray, podem ser indicadas. No entanto, com a finalidade de tornar as escovas isentas de microrganismos, a solução à base de gluconato de clorexidina a 0,12% apresentou eficácia estatisticamente superior aos demais sprays avaliados.
Title in English
Evaluation of microbial contamination and efficacy of antimicrobial agents in disinfection of handicapped patients' toothbrushes
Keywords in English
Disinfection
Handicapped patients
Mutans group estreptococci
Toothbrushes
Abstract in English
The aim of this study was to evaluate the contamination of 39 handicapped patients' toothbrushes, and also evaluate two disinfection methods by microbial culture and cariogenic biofilm formation. The clinical procedures were divided in three stages, with intervals of 72-96-hours among each one. At the first stage, the patients brushed their teeth with Sorriso toothpaste, rinsed their teeth with water and their toothbrushes were imediately sprayed with sterilized tapped water. ln the second and third stages, the handicapped patients' teeth were brushed using toothpaste, while their toothbrushes were sprayed with 0,12% gluconate chlorhexidine (Periogard - Colgate) and 0,05% Cetylpyridinium chloride (Anti-séptico bucal Reach Johnson), respectively. At the end of each stage, the toothbrushes were submitted to the culture in CaSa B medium. The results were submitted to Friedman's, Dunn's, Cochran's tests as well as to a signal test. ln Stage 1 (disinfected with sterilized tapped water), mutans group streptococci were present in 30 of 39 toothbrushes (76,9%), and the number of colonies/biofilms varied from 0 to + 100. ln Stage II, where disinfection was carried out using 0,12% chlorhexidine, no mutans group streptococci colonization was observed. ln Stage III (disinfected with 0,05% Cetylpyridinium chloride), only 10,2% of the toothbrushes were contaminated with mutans group streptococci, and the number of colonies/biofilms varied from 1 to 31. One could conclude that the bristle of the toothbrushes which belonged to handicapped patients became contaminated by mutans group streptococci after a single 1-minute brushing. ln order to reduce the contamination of toothbrushes caused by mutans group streptococci, both a 0,12% gluconate chlorhexidine solution and a 0,05% Cetylpyridinium chloride spray solution can be used. To make toothbrushes microorganism-free, the 0,12% gluconate chlorhexidine solution proved to be statisticaly better.
 
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2024-01-29
 
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