Abstract. Pigments of food and beverages could affect dental bleaching efficacy. The aim of this investigation was to evaluate color change and mineral loss of tooth enamel as well as the influence of staining solutions normally used by adolescent patients undergoing home bleaching. Initial hardness and baseline color were measured on enamel blocks. Specimens were divided into five groups (n ¼ 5): G1 (control) specimens were kept in artificial saliva throughout the experiment (3 weeks); G2 enamel was exposed to 10% carbamide peroxide for 6 h daily, and after this period, the teeth were cleaned and stored in artificial saliva until the next bleaching session; and G3, G4, and G5 received the same treatments as G2, but after bleaching, they were stored for 1 h in cola soft drink, melted chocolate, or red wine, respectively. Mineral loss was obtained by the percentage of hardness reduction, and color change was determined by the difference between the data obtained before and after treatments. Data were subjected to analysis of variance and Fisher's test (α ¼ 0.05). G3 and G5 showed higher mineral loss (92.96 AE 5.50 and 94.46 AE 1.00, respectively) compared to the other groups (p ≤ 0.05). G5 showed high-color change (9.34 AE 2.90), whereas G1 presented lower color change (2.22 AE 0.44) (p ≤ 0.05). Acidic drinks cause mineral loss of the enamel, which could modify the surface and reduce staining resistance after bleaching.
The developed toothpaste prevents caries as a standard one and is safe for individuals of any age group.
The present study analyzed the action of sodium trimetaphosphate (TMP) and/or fluoride on hydroxyapatite. Hydroxyapatite powder was suspended in different solutions: deionized water, 500 µg F/mL, 1,100 µg F/mL, 1%TMP, 3%TMP, 500 µg F/mL plus 1%TMP and 500 µg F/mL plus 3%TMP. The pH value of the solutions was reduced to 4.0 and after 30 min, raised to 7.0 (three times). After pH-cycling, the samples were analyzed by X-ray diffraction and infrared spectroscopy. The concentrations of calcium fluoride, fluoride, calcium and phosphorus were also determined. Adding 1% or 3% TMP to the solution containing 500 µg F/mL produced a higher quantity of calcium fluoride compared to samples prepared in a 1,100 µg F/mL solution. Regarding the calcium concentration, samples prepared in solutions of 1,100 µg F/mL and 500 µg F/mL plus TMP were statistically similar and showed higher values. Using solutions of 1,100 µg F/mL and 500 µg F/mL plus TMP resulted in a calcium/phosphorus ratio close to that of hydroxyapatite. It is concluded that the association of TMP and fluoride favored the precipitation of a more stable hydroxyapatite.
OLIVEIRA, E. R. de; MELÃO, M. de J. A. da S.; ALVES, E. Eficácia de diferentes tipos de escovas dentais na remoção do biofilme bucal. Arq. Cienc. Saúde UNIPAR, Umuarama, v. 20, n. 2, p, 101-109, maio/ago. 2016. RESUMO:Devido ao fato de o método mais indicado para remoção do biofilme bucal ser o mecânico, com a utilização da escova dental, buscou-se verificar as características das escovas dentais mais eficazes. Foram avaliadas as seguintes características: relação entre cabo haste e cabeça, com o intuito de verificar angulações, formato e tipo das cerdas, considerando tamanho e disposição dos tufos, bem como comparar a eficácia das escovas manuais e elétricas. O estudo foi realizado com 28 crianças em uma escola municipal da cidade de Umuarama-PR. Foram utilizados quatro tipos de escovas: escova de haste reta com cerdas regulares; escova de haste angulada com cerdas regulares; escova de haste angulada com cerdas irregulares e escova elétrica. Foram realizados a evidenciação do biofilme e o Índice de Higiene Oral Simplificado (IHOS) antes e após a escovação. Os diferentes tipos de escovas foram avaliados de acordo com a diferença entre o percentual de biofilme antes e após a escovação, bem como em relação à redução da classificação do IHOS. Nas diferentes análises, a escova de haste reta apresentou os melhores resultados. Em contrapartida, a escova elétrica apresentou resultados menos satisfatórios. Pode-se concluir que todas as escovas dentárias apresentaram potencial de redução do biofilme dentário, independentemente das características de sua haste, cerdas ou manuseio (manual ou elétrico). Contudo, os melhores resultados foram atribuídos à escova que apresenta a haste reta, que também possui cerdas regulares. PALAVRAS-CHAVE: Dispositivos para o cuidado bucal domiciliar. Escovação dentária. Higiene bucal. EFFECTIVENESS OF DIFFERENT TYPES OF DENTAL BRUSHES IN REMOVAL OF ORAL BIOFILMABSTRACT: Since the most effective method for the removal of oral biofilm is the mechanical one, with the use of a toothbrush, this study aimed to check the characteristics of the most effective toothbrushes. The following characteristics were analyzed: handle and head ratio, tuft layout, as well as a comparison between manual and electric toothbrushes. This work was conducted with 28 children in a public school in the city of Umuarama/PR. Four types of brushes were used: straight shank brush with regular bristles; angled stem with regular bristles; angled stem with irregular bristles; and electric toothbrush. The disclosure of oral biofilm and the Simplified Oral Hygiene Index (SOHI) before and after brushing were analyzed. The different kinds of brushes were evaluated according to the difference between the percentage of biofilm before and after brushing, as well as the reduction of SOHI. Straight shank brushes showed the best results in different analysis. On the other hand, the electric toothbrush brought the less satisfactory results. It was possible to conclude that all toothbrushes have shown potential for biofilm reduction, re...
302Longitudinal behavioral analysis during dental care of children aged 0 to 3 years Abstract: "When" and "how" the dentist intervenes have repercussions on children's physical and emotional patterns. The objective of the present study was to conduct a longitudinal behavioral analysis during dental care of babies aged 0 to 3 years. A total of 216 patients seen at the Baby Clinic of the School of Dentistry at Araçatuba, São Paulo State University (UNESP), were selected. The selection criterion was attendance at ten dental care sessions at bimonthly intervals for routine procedures such as clinical examination and oral hygiene. There was a predominance of cooperative behavior compared to uncooperative behavior when each visit was analyzed separately. The behavior of the patients must have been directly influenced by their psychomotor development. Constant attendance and exposure of the baby to non-stressful dental stimuli are factors that favor a cooperative behavior.
Child temperament has been studied in various researches and may be useful to predict how a child responds to dental treatment, especially very young children. The purpose of the present longitudinal study was to evaluate the behavioral manifestation of children aged 0 to 3 years, considering different types of dental situation. A total of 169 children were selected and the following data were collected: the age of the child, gender, age of the mother, number of dental visits and their respective dates, stimuli offered to the child, and behavioral response to these stimuli. The children and their respective behaviors were divided into five groups according to the dental situation offered: control, missed visits, fluoride varnish, restoration, and dental trauma. The data were submitted to descriptive and inferential analysis using the chi-square test, with the level of significance set at 5%. Analysis of the different situation offered to infants during routine dental care revealed a predominance of collaborating and partially collaborating behavior, and age at the time of dental care influenced the behavior of the infants, irrespective of the stimulus group. The different types of dental situation provoked changes in the behavioral response of the children of certain age groups, especially in the dental trauma group.
TONDATTI, C. A.; GAMBERINI, R.; PFAU, V. de J. M. Relação de transmissibilidade da microbiota bucal entre pares mães-filhos. Arq. Cienc. Saúde UNIPAR, Umuarama, v. 18, n. 3, p, 145-150, set./dez. 2014. RESUMO:As principais doenças que acometem a cavidade bucal, como a cárie e as doenças periodontais apresentam sua etiologia relacionada à presença de micro-organismos específicos. Esta pesquisa tem como objetivo conhecer a relação de transmissibilidade de micro--organismos presentes na microbiota bucal entre mães e filhos, verificar sua relação e avaliar a presença de doenças bucais nas mães e sua possível interferência na transmissibilidade, identificando os grupos bacterianos mais prevalentes na cavidade bucal de crianças entre 1 a 5 anos de idade e suas mães. Foram selecionados para a pesquisa 10 pares mãe-filho que frequentam a clínica Bebê-Dente da UNIPARUmuarama onde foi realizada a coleta do biofilme supragengival e subgengival com cones de papel absorvente estéreis para posterior aná-lise microbiológica. A partir da coleta e análises realizadas, foi verificado crescimento microbiano nas placas de Petri, e microscopicamente detectou-se a presença de cocos, estreptococos, estafilococos e bacilos, o grau de semelhança em relação à coloração de Gram e a atividade da doença cárie. Alguns autores consideram a mãe como a principal fonte de transmissão da microbiota bucal, afirmando que a transmissão provavelmente acontece pelo íntimo contato da mãe com o filho. Concluiu-se com esta pesquisa que o padrão de transmissibilidade dos micro-organismos bucais é determinado pelas mães, ou seja, ocorre uma transmissão vertical. Por isso, é de suma importância conscientizá--las, por meio de programas preventivos, para evitar que aconteça a transmissão de micro-organismos, e consequentemente, a redução do risco de contaminação e desenvolvimento da cárie nas crianças. PALAVRAS-CHAVE:Transmissibilidade; Micro-organismos; Mãe-filho; Cárie. ORAL MICROBIOTA TRANSMISSIBILITY RELATIONSHIP BETWEEN MOTHER-CHILD PAIRS ABSTRACT:The main diseases affecting the oral cavity, such as caries and periodontal diseases, have their etiology related to the presence of specific microorganisms. This study has the objective of analyzing the microorganism transmissibility relationship found in oral flora between mothers and their children and evaluate the presence of oral diseases in mothers and the possible interference in transmissibility, identifying the bacterial groups that are the most prevalent in the oral cavities of children aged between 1 and 5 years and their mothers. Ten pairs of mothers and children that are usually seen at "Bebê -Dente" clinic, at UNIPAR (Umuarama), were selected for this research. In the clinic, tooth biofilm was collected using sterilized absorbent paper cones. From the samples collected and analyzed, it could be observed that all the samples presented microbial growth, and the presence of cocci, streptococci, staphylococci and bacilli, the degree of similarity in relation to Gram stain and cavity activity were micr...
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