ABSTRACT
ABSTRACT Objective: To evaluate the effect of erosive challenges on the tooth- restoration interface of deciduous teeth treated with different adhesive protocols. Material and Methods: Deciduous molars were cut mesiodistally, then embedded, abraded and polished (n=80). Samples were randomly divided according to the adhesive system used into: G1 (Adper Single Bond2®, etch-and-rinse), G2 (Universal Single Bond®, self-etching), G3 (OptibondFL®, etch-and-rinse with Fluoride) and G4 (BondForce®, self-etching with Fluoride). After standardized cavity preparation (2 mm diameter x 2 mm depth), adhesive systems were applied and samples were restored (composite resin Z350®). Half of the samples were exposed to erosive/abrasive cycles (n = 10, each adhesive group), and the other half (control group; n = 10) remained immersed in artificial saliva. For microleakage analysis, samples were submersed in methylene blue and analyzed at 40x magnifications. Cross-sectional microhardness (CSMH) was carried out (50 g/5 s) at 25 μm, 50 μm, and 100 μm from the eroded surface and at 25 μm, 75 μm, and 125 μm from the enamel bond interface. Results: Regarding microleakage, 7.5% of the samples showed no dye infiltration, 30% showed dye infiltration only at the enamel interface, and 62.5% showed dye infiltration through the dentin-enamel junction, with no difference between groups (p≥0.05). No significant difference was observed in CSMH at different depths (two-way ANOVA, p≥0.05). Conclusions: We did not observe significant changes in microleakage or CSMH after erosive/abrasive challenges in deciduous teeth treated with different adhesive protocols (etch-and-rinse and self-etching adhesives, with and without fluoride).
Subject(s)
Humans , Tooth, Deciduous/chemistry , Tooth Erosion/etiology , Bisphenol A-Glycidyl Methacrylate/chemistry , Composite Resins/chemistry , Resin Cements/chemistry , Dental Cements/chemistry , Reference Values , Saliva, Artificial/chemistry , Surface Properties , Tooth, Deciduous/drug effects , Materials Testing , Random Allocation , Reproducibility of Results , Analysis of Variance , Statistics, Nonparametric , Dental Enamel/drug effects , Dental Enamel/chemistry , Dental Leakage/etiology , Dentin/drug effects , Dentin/chemistry , Fluorides/chemistry , Hardness TestsABSTRACT
The aim of this study was to evaluate the effect of industrialised foods and drinks on primary tooth enamel previously eroded with hydrochloric acid (HCl). The crowns of one hundred two specimens were subjected to an erosive challenge with HCl and randomly divided into six groups (n = 17): Chocolate Milk (Toddynho® - Pepsico) - negative control; Petit Suisse Yogurt (Danoninho® - Danone); Strawberry Yogurt (Vigor); Apple puree (Nestlé); Fermented Milk (Yakult® - Yakult); and Home Squeezed Style Orange Juice (del Valle) - positive control. The 28-day immersion cycles for the test products were performed twice daily and were interspersed with exposure of the test substrate to artificial saliva. Measurements of enamel surface microhardness (SMH) were performed initially, after immersion in HCl and at 7, 14, 21 and 28 days of experimentation. A two-way ANOVA, according to a split-plot design, followed by the sum of squares decomposition and Tukey’s test, revealed a significant effect for the interaction between Foods and Drinks and Length of Exposure (p < 0.00001). Orange juice resulted in greater mineral loss of enamel after 28 days. None of the test products was associated with recovery of tooth enamel microhardness.
Subject(s)
Humans , Beverages/adverse effects , Dental Enamel/drug effects , Hydrochloric Acid/chemistry , Snacks , Tooth Erosion/chemically induced , Tooth, Deciduous/drug effects , Analysis of Variance , Dental Enamel/chemistry , Fruit , Hardness Tests , Hydrogen-Ion Concentration , Random Allocation , Reference Values , Surface Properties , Saliva, Artificial/chemistry , Time Factors , Tooth, Deciduous/chemistryABSTRACT
The aim of this in vitro study was to evaluate the tensile bond strength of a self-etching adhesive system to three different dentinal substrates. Primary molar teeth that had been recently exfoliated (RE), with unknown time of exfoliation (UT), and extracted due to prolonged retention (PR) were used for this investigation. Ten primary molar teeth of each group were cut in the middle following the mesio-distal direction, creating a total of twenty specimens per group. The specimens were included in acrylic resin and had a flat dentin surface exposed. The self-etching adhesive system was applied to this surface and a 3-millimeter high cone with diameter of 2 mm in the adhesion area was constructed using composite resin. The specimens were stored in distilled water at 37ºC for 24 hours. Fifteen specimens of each substrate were used for the tensile bond test (n = 15) and 5 had the interface analyzed by scanning electron microscopy (SEM). The data was examined by one-way ANOVA and presented no significant differences between groups (p = 0.5787). The mean values obtained for RE, UT and PR were 18.39 ± 9.70, 19.41 ± 7.80, and 23.30 ± 9.37 MPa, respectively. Any dentinal substrates of primary teeth studied are safe for tensile bond strength tests with adhesive systems.
Subject(s)
Humans , Dental Bonding/methods , Dentin-Bonding Agents/chemistry , Dentin/ultrastructure , Tooth, Deciduous/ultrastructure , Acrylic Resins , Composite Resins/chemistry , Dentin/chemistry , Microscopy, Electron, Scanning , Surface Properties , Tensile Strength , Time Factors , Tooth Exfoliation , Tooth, Deciduous/chemistryABSTRACT
A exposição passiva ao tabaco é um problema médico e social que leva o não fumante a sofrer uma série de doenças, tanto sistêmicas como de repercussão bucal. Este trabalho apresenta uma revisão da literatura que relaciona o tabagismo passivo com o risco de cárie dental e alterações gengivais na dentição decídua, com o propósito de levar ao conhecimento do profissional cirurgião-dentista um tema não muito difundido e instruí-lo na sua prevenção.
Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Dental Caries/diagnosis , Dental Caries/etiology , Tooth, Deciduous/abnormalities , Tooth, Deciduous/chemistry , Gingival Diseases/diagnosis , Gingival Diseases/chemically induced , Tobacco Smoke Pollution/analysis , Diagnosis, Oral , Child HealthABSTRACT
The influence of trace elements on the prevalence of caries is a complex subject. However, the demonstration of an inverse relationship between caries prevalence and fluoride (F) intake indicates the potential effect of trace elements on caries. AIMS AND OBJECTIVES: This in vitro study sought to estimate and compare the trace element concentrations in sound and carious enamel of primary and permanent teeth. MATERIALS AND METHODS: Forty sound and carious primary and permanent teeth, extracted from children and adolescents of Davangere city, were collected. The teeth were divided into four groups (of ten each) and enamel samples were prepared by mechanical grinding. The trace elements were estimated using atomic absorption spectrophotometer. RESULTS AND CONCLUSIONS: The results of our study showed the presence of 18 trace elements (F, Sr, K, Al, Si, Ni, B, Fe, Cu, Mn, Co, Cr, Zn, Mg, Se, Pb, Mo, and V) in the enamel of sound and carious primary and permanent teeth. The mean, standard deviation, and range (at 95% confidence level) were calculated for each element. The concentrations of F, Sr, and K were significantly ( P <0.05) higher in sound enamel of permanent teeth than in sound enamel of primary teeth. The concentrations of F, Sr, K, Al, and Fe were significantly ( P <0.05) higher in sound enamel of permanent teeth than in carious enamel of permanent teeth. The concentrations of F, K, and Si were significantly ( P <0.05) higher in sound enamel of primary teeth than in carious enamel of primary teeth.
Subject(s)
Adolescent , Adult , Aluminum/analysis , Boron/analysis , Child , Chromium/analysis , Cobalt/analysis , Copper/analysis , Dental Caries/metabolism , Dental Enamel/chemistry , Fluorine/analysis , Humans , India , Iron/analysis , Magnesium/analysis , Manganese/analysis , Nickel/analysis , Potassium/analysis , Silicon/analysis , Spectrophotometry, Atomic , Strontium/analysis , Tooth, Deciduous/chemistry , Trace Elements/analysis , Zinc/analysisABSTRACT
O propósito deste estudo foi avaliar 42 molares decíduos submetidos à pulpotomia, por indicaçäo clínica, cujo capeamento pulpar foi feito com hidroxiapatita microgranular sintetizada no Departamento de Bioquímica da Faculdade de Odontologia de Bauru da Universidade de Säo Paulo. O material capeador foi usado em 21 dentes sob a forma de material pó, e 21 dentes na forma de pasta (21), sendo esta pasta preparada no momento de intervençäo, por meio da adiçäo de uma soluçäo antiinflamatória ao pó de hidroxiapatita. Após o período de 6 meses foram realizadas análises clínica e radiográfica. Com base nos resultados obtidos, segundo as condiçöes experimentais em que foi realizado este trabalho, podem-se verificar que: a análise radiográfica quando associada a análise clínica como controle pós-operatório é mais segura que somente a análise clínica; o material capeador pulpar na forma de pasta pareceu ser melhor aceito pelos tecidos pulpares que o na forma de pó; a adiçäo de uma soluçäo antiinflamatória ao pó para formar a pasta pode ter sido responsável pela tendência de maior sucesso com o material na forma de pasta; a hidroxiapatita microgranular pode ser considerada uma opçäo como material regenerador na técnica de pulpotomia em dentes decíduos
Subject(s)
Humans , Male , Female , Child, Preschool , Child , Dental Pulp Capping/methods , Durapatite/analysis , Tooth, Deciduous/chemistry , Biocompatible Materials/analysis , Dental Materials/analysis , Molar/chemistry , Pediatric Dentistry , PulpotomySubject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Tooth, Deciduous , Tooth, Deciduous/anatomy & histology , Tooth, Deciduous/physiology , Tooth, Deciduous/chemistryABSTRACT
O objetivo deste estudo, de um ano de duraçäo, foi o de testar os efeitos cariostático e anticariogênico, sobre os dentes decíduos e primeiros molares permanentes e, o efeito antimicrobiano, sobre os estreptococos mutans e os lactobacilos, da soluçäo de diaminofluoreto de prata a 12 por cento em 120 pré-escolares, com idades entre 5 1/2 e 6 anos, do município de Bauru-SP. Essas crianças foram selecionadas com relaçäo à cárie dentária, segundo critério de LOESCHE 47, divididas em 3 grupos de 40 indivíduos, sendo os grupos subdivididos em 2 de 20 crianças cada, para que um deles fosse avaliado microbiologicamente no início e durante o estudo, através dos níveis salivares dos estreptococos mutans e dos lactobacilos. Todas as crianças receberam aplicaçöes trimestrais da soluçäo. As do Grupo I receberam inicialmente tratamento odontológico completo e aplicaçäo da soluçäo em todos os dentes presentes na cavidade bucal, exceto os primeiros molares permanentes; as do Grupo II, aplicaçöes da soluçäo nos dentes decíduos e as do Grupo III, aplicaçöes da soluçäo apenas nos primeiros molares permanentes. As amostras de saliva dos 3 grupos foram coletadas antes do início do tratamento (1ª etapa). No Grupo Ia coletaram-se amostras uma semana após tratamento restaurador (2ª etapa), uma semana após a primeira aplicaçäo da soluçäo (3ª etapa), 3 meses (4ª etapa), 6 meses (5ª etapa), 9 meses (6ª etapa) e 12 meses (7ª etapa), após a primeira aplicaçäo da soluçäo e no Grupo IIIa coletou-se 1, 2 e 6 meses após a primeira aplicaçäo da soluçäo...
Subject(s)
Humans , Female , Child, Preschool , Child , Tooth, Deciduous/chemistry , Fluorides/analysis , Lactobacillus/chemistry , Molar/chemistry , Streptococcus mutans/chemistry , Dental Caries/prevention & control , Cariostatic Agents/analysis , Fluorides, Topical/analysis , Pediatric DentistryABSTRACT
Neste estudo foram analisados 40 dentes decíduos cariados de crianças na faixa etária de 2 a 6 anos. Utilizou-se a fucsina básica para identificar a dentina cariada e esta foi classificada em cáries de profundidade média ou profunda e crônicas ou agudas. Numa primeira etapa após a coloraçäo apenas a detina manchada era retirada com curetas de dentina. Como curativo de demora utilizou-se o óxido de zinco e eugenol tipo II por 45 dias. Após este período o dente era aberto e novamente corado e avaliado, comprovando-se a existência de dentina näo contaminada. Pode-se concluir que, é viável aplicaçäo do método proposto por Fusayama em dentes decíduos ou seja, após a segunda coloraçäo da dentina, se esta apresentar cor rosa clara ela poderá se reorganizar