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1.
Pesqui. bras. odontopediatria clín. integr ; 16(1): 359-367, jan.-dez. 2016. tab, graf
Article in English | LILACS, BBO | ID: biblio-912880

ABSTRACT

Objective: To investigate the influence of the erosive potential of Amazonian fruits on the bovine enamel microhardness. Material and Methods: A total of 30 healthy bovine incisors were divided into three groups, according to the Amazonian fruit juice used in the erosive challenge: Group A - taperebá (Spondias mombin), Group B - cupuaçu (Theobioma gandiflorum) Group C - graviola (Annona muricata), with n=10. The planning of specimens polishing was performed with decreasing grain sandpaper. Specimens were submitted to microhardness initial reading carried out in microhardness meter using Knoop indenter, using load of 50g for 15 sec. Three indentations were performed on reference surfaces with a distance of at least 100 µm from each other. Specimens were stored in distilled water up to the erosive challenge, which consisted of three steps: (1) 5-minute immersion in 10 ml of acid juice; (2) washing with distilled water and mild drying with tissue paper; (3) 60-minute immersion in 10 ml of artificial saliva. Subsequently, samples were stored in distilled water for reading of the final microhardness, after erosive challenge. Data were analyzed by ANOVA with α=0.05.. Results: All groups showed a statistically significant reduction in Knoop microhardness (KHN) after erosive challenge (p<0.0001). Group B showed the lowest average KHN (113.6) after erosive challenge, though not statistically different from Groups A and C (p=0.1592). Conclusion: Juices of fruits evaluated significantly changed the dental enamel hardness, and cupuaçu juice (Theobioma gandiflorum) caused the greatest surface hardness loss.


Subject(s)
Animals , Cattle , Brazil , Cattle , Fruit and Vegetable Juices , Tooth Erosion , Analysis of Variance , Dental Enamel , Hardness
2.
São Paulo; s.n; 2012. 101 p. ilus, tab. (BR).
Thesis in Portuguese | LILACS, BBO | ID: biblio-866345

ABSTRACT

O objetivo deste estudo in vitro foi avaliar o potencial erosivo de suco de fruta amazônica ácida sobre a superfície dentinaria associado ao efeito abrasivo de diversos cremes dentais contendo agentes dessensibilizantes. O trabalho foi dividido em 3 fases distintas: Na fase 1, o valor do pH inicial de diversas frutas amazônicas foi medido utilizando 50 ml de cada suco, obtido de polpa industrializada. Foi utilizado um eletrodo de pH calibrado e a água destilada foi utilizada como controle. Na fase 2, 120 espécimes de dentina bovina foram submetidos a ciclos alternados de desafio abrasivo e erosivo, com a fruta escolhida na fase 1. Os espécimes foram divididos aleatoriamente em Grupo A (Desafio Abrasivo) e Grupo B (Desafio Erosivo e Abrasivo). Cada um destes grupos foram subdivididos em 5 subgrupos: 1: Água Destilada (Controle Negativo), 2: Colgate Tripla Ação (Controle Positivo), e os demais de acordo com o creme dental utilizado 3: Sensodyne Rápido Alívio, 4: Colgate Pró-Alivio e 5: Sensodyne Repair&Protect, (n=9). Na fase 3 foi realizado microscopia eletrônica de varredura para avaliar qualitativamente os espécimes (n=3). - O suco da fruta taperebá (Spondias mombin) apresentou os menores valores de pH, diante disso, foi escolhido como agente erosivo; Os testes de Kruskall Wallis e Teste de Dunn, mostraram que para os grupos nos quais somente a abrasão foi realizada, todos os cremes dentais mostraram comportamentos semelhantes em relação a perfilometria, não havendo diferença estatisticamente significante entre os grupos


Porém, para os grupos nos quais o processo erosivo foi adicionado, observou-se a potencialização do processo abrasivo, sendo que os cremes dentais Sensodyne Rápido Alivio e Colgate Sensitive Pro-Alivio foram os que mostraram menores alterações superficiais no padrão de perfilometria, comparados com o grupo controle negativo. Já os cremes dentais, Colgate Tripla Ação (controle positivo) e Sensodyne Repair&Protect apresentaram-se semelhantes entre si e com uma perda de estrutura dentinaria. mais significante. Conclui-se que o efeito erosivo da fruta amazônica taperebá é fator de grande importância na potencialização do efeito abrasivo, mesmo quando do uso de cremes dentais com agentes dessensibilizantes.. Na análise qualitativa da superfície dentinária em MEV, com exceção do Colgate tripla ação, os demais grupos não apresentaram oclusão tubular após o desafio ácido


The aim of this in vitro study was to evaluate the erosive potential of amazonian fruit juice with or without the abrasive challenge with various toothpastes containing desensitizing agents. The work was divided into three phases: in phase 1, the pH of various Amazonian fruits was evaluated. In step 2 it was performed surface perfilometry of the specimens, and in phase 3 it was evaluated qualitatively the dentin surface. In step 1, the initial pH value of several amazonian fruits was measured using 50 mL of each juice, from industrialized pulp. It was used a calibrated pH electrode, and distilled water was used as control. In step 2, 120 bovine dentin specimens were subjected to alternate cycles of abrasive and erosive challenge, with the fruit chosen in step 1. The specimens were randomly divided into Group A (without erosion) and Group B (with erosion). Each of these groups were divided into 5 groups: 1: Distilled Water, 2: Colgate Tripla Ação, 3: Sensodyne Rápido Alívio, 4: Pro-Alivio, 5: Sensodyne Repair & Protect, (n = 9). In Phase 3 it was conducted scanning electron microscopy to evaluate qualitatively the specimens (n=3). As a result it can be stated that: 1.


The juice of the taperebá fruit had the lowest pH values, so it was chosen as the erosive agent; 2. For the groups in which only the abrasion was performed, all toothpastes showed similar behaviors, no statistically significant difference was observed between groups, but for the groups in which the erosion process was added, there was a potentiation of the abrasive process, and the toothpastes showed different profiles. The toothpaste Sensodyne Rapido Alívio Pró-Alívio was the ones that showed lower mineral loss, compared with the negative control group. Colgate Tripla Ação and Sensodyne Repair&Protect were similar among themselves and with a more significant mineral loss. It can be conclude that erosive effect of diet is a factor of great importance in the potentiation of abrasive effect. Clinical studies are essential to determine the dentin hypersensitivity levels after use of toothpaste used.


Subject(s)
Animals , Cattle , Tooth Abrasion/diagnosis , Dentin/physiology , Microscopy, Electron, Scanning/methods
3.
Rev. bras. med. esporte ; 15(4): 282-286, jul.-ago. 2009. ilus, graf
Article in Portuguese | LILACS | ID: lil-526430

ABSTRACT

Este estudo teve o propósito de avaliar o nível de conhecimento de 150 alunos de graduação dos cursos de Odontologia e Educação Física acerca dos protetores bucais no município de Belém, Brasil. Além disso, objetivou-se promover maior informação a esses futuros profissionais, por meio de palestras e distribuição de folders, nas quais o foco principal eram os protetores bucais, suas indicações, seus tipos, sua higienização e armazenamento. Os participantes da pesquisa pertenciam ao último ano de seus referidos cursos de graduação. A análise dos resultados permitiu evidenciar que 68 por cento dos alunos entrevistados ainda não possuem informação adequada acerca dos protetores bucais, mas que, apesar disso, em sua maioria são conscientes quanto aos riscos a que vários atletas são submetidos em esportes que exigem impacto físico. Os autores acreditam que é extremamente importante que haja maior divulgação da importância da utilização de protetores bucais na prática esportiva, visando a prevenção e a promoção de saúde da população em geral.


This study had the aim to assess the level of knowledge of 150 Odontology and Physical Education undergraduation students concerning mouth guards in the city of Belém, Brazil. Besides that, we tried to provide further information to these future professionals through speeches and distribution of folders in which the main focus was the mouth guards, their indications, types as well as hygienization and storage. The participants in the research were in the last year of their specific undergraduation courses. The analysis of the results showed that 68 percent of the interviewed students still do not have suitable information on the mouth guards, but despite of that, in their majority they are aware of the risks many athletes face in sports which have physical impact. The authors believe the spread of the information on the use of mouth guards in sportive practice is relevant and aims to prevent trauma and promote health of general population.


Subject(s)
Humans , Male , Female , Young Adult , Mouth/injuries , Education, Dental , Physical Education and Training , Mouth Protectors , Students , Tooth Injuries , Athletic Injuries/prevention & control , Health Promotion , Surveys and Questionnaires , Sports
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