RESUMO
Since there is no consensus about whether starch increases the cariogenic potential of sucrose, we used a validated 3-species biofilm model to evaluate if starch combined with sucrose provokes higher root dentine demineralization than sucrose alone. Biofilms (n = 18) composed by Streptococcus mutans (the most cariogenic bacteria), Actinomces naeslundii (which has amylolytic activity), and Streptococcus gordonii (which binds salivary amylase) were formed on root dentine slabs under exposure 8 ×/day to one of the following treatments: 0.9% NaCl, 1% starch, 10% sucrose, or a combination of 1% starch and 10% sucrose. Before each treatment, biofilms were pretreated with human whole saliva for 1 min. The pH of the culture medium was measured daily as an indicator of biofilm acidogenicity. After 96 h of growth, the biofilms were collected, and the biomass, bacteria viability, and polysaccharides were analyzed. Dentine demineralization was assessed by surface hardness loss (% SHL). Biofilm bioarchitecture was analyzed using confocal laser scanning microscopy. Treatment with a starch and sucrose combination provoked higher (p = 0.01) dentine demineralization than sucrose alone (% SHL = 53.2 ± 7.0 vs. 43.2 ± 8.7). This was supported by lower pH values (p = 0.007) of the culture medium after daily exposure to the starch and sucrose combination compared with sucrose (4.89 ± 0.29 vs. 5.19 ± 0.32). Microbiological and biochemical findings did not differ between biofilms treated with the combination of starch and sucrose and sucrose alone (p > 0.05). Our findings give support to the hypothesis that a starch and sucrose combination is more cariogenic for root dentine than sucrose alone.
Assuntos
Dentina/fisiopatologia , Sacarose Alimentar/efeitos adversos , Cárie Radicular/etiologia , Amido/efeitos adversos , Desmineralização do Dente/etiologia , Raiz Dentária/fisiopatologia , Actinomyces/fisiologia , Animais , Biofilmes/crescimento & desenvolvimento , Bovinos , Dentina/diagnóstico por imagem , Dentina/microbiologia , Dureza , Humanos , Concentração de Íons de Hidrogênio , Microscopia Confocal , Modelos Animais , Cárie Radicular/diagnóstico por imagem , Cárie Radicular/microbiologia , Saliva/fisiologia , Streptococcus gordonii/fisiologia , Streptococcus mutans/fisiologia , Propriedades de Superfície , Raiz Dentária/diagnóstico por imagem , Raiz Dentária/microbiologiaRESUMO
Eye defects can lead to emotional, psychological, and social changes, impacting negatively the quality of life of the patient. When these structures cannot be satisfactorily repaired by reconstructive surgery, the prosthetic rehabilitation is the better treatment option to restore lost ocular anatomy and promote the social integration of the individual. The aim of this clinical report is to report and discuss a case of ocular prosthesis confection eviscerated patient with opening limitation eyelid and shortening of the distance between palpebral commissure, to obtain a more natural and comfortable to the patient ocular rehabilitation.
Assuntos
Olho Artificial , Procedimentos de Cirurgia Plástica/instrumentação , Implantação de Prótese/instrumentação , Pálpebras , Humanos , Masculino , Pessoa de Meia-Idade , Desenho de Prótese , Implantação de Prótese/métodos , Qualidade de Vida , Procedimentos de Cirurgia Plástica/métodosRESUMO
INTRODUCTION: The surface free energy of conditioned-dentin is one of the factors that interfere with monomeric infiltration of the interfibrillar spaces. Saturation of the tooth matrix with different substances may modulate this energy and, consequently, the wettability of the dentin. AIM: To evaluate the influence of different substances used to saturate conditioned-dentin on surface free energy (SFE) of this substrate. MATERIALS AND METHODS: Dentin blocks (4 × 7 × 1 mm, n = 6/ group), obtained from the roots of bovine incisors, were etched using phosphoric acid for 15 seconds, rinsed and gently dried. The surfaces were treated for 60 seconds with: ultra-purified water (H20-control); ethanol (EtOH), acetone (ACT), chlorhexidine (CHX), ethylenediaminetetraacetic acid (EDTA); or sodium hypochlorite (NaOCl). The tooth surfaces were once again dried with absorbent paper and prepared for SFE evaluation using three standards: water, formamide and bromonaphthalene. Analysis of variance (ANOVA) and Dunnet's tests (a = 0.05) were applied to the data. RESULTS: Ethylenediaminetetraacetic acid was the only substance that caused a change to the contact angle for the standards water and formamide, while only EtOH influenced the angles formed between formamide and the dentin surface. None of the substances exerted a significant effect for bromonaphtha-lene. In comparison to the control, only EDTA and NaOCl altered both polar components of the SFE. Total SFE was increased by saturation of the collagen matrix by EDTA and reduced when NaOCl was used. CONCLUSION: Saturation of the collagen matrix by EDTA and EtOH changed the surface free energy of the dentin. In addition, the use of NaOCl negatively interfered with the properties evaluated. CLINICAL SIGNIFICANCE: The increase of surface free energy and wettability of the dentin surface would allow higher penetration of the the adhesive system, which would be of importance to the clinical success of resin-dentin union.
Assuntos
Colágeno/efeitos dos fármacos , Dentina/efeitos dos fármacos , Irrigantes do Canal Radicular/farmacologia , Solventes/farmacologia , Acetona/farmacologia , Condicionamento Ácido do Dente/métodos , Animais , Bovinos , Clorexidina/farmacologia , Colágeno/ultraestrutura , Dentina/ultraestrutura , Ácido Edético/farmacologia , Etanol/farmacologia , Formamidas/química , Teste de Materiais , Naftalenos/química , Ácidos Fosfóricos/química , Hipoclorito de Sódio/farmacologia , Tensão Superficial , Água/química , MolhabilidadeRESUMO
OBJECTIVES: Untreated dental caries can compromise oral health-related quality of life (OHRQoL). However, it is not clear which specific daily activities related to OHRQoL are compromised by the presence of this problem. Therefore, the purpose of this study was to identify which specific daily activities are affected by the presence of untreated dental caries using a representative sample of Brazilian children. METHODS: A cross-sectional study using a representative sample of Brazilian children (12 years of age) was conducted. The presence of untreated dental caries was assessed using the "decayed - D" component of the DMFT (decayed, missing, and filled teeth) index. Clinical exams were conducted by trained and calibrated dentists. The daily activities were evaluated using the survey Oral Impacts on Daily Performance (OIDP), considering items and domains. Descriptive, bivariate, and multiple analyses were conducted (α = 0.05). RESULTS: A total of 7,247 children were included, and 39.9 percent had at least one tooth with untreated dental caries, with 33.5 percent experiencing an impact on at least one of the OIDP activities. This study identified a greater chance of the presence of untreated dental caries in children having an impact on the psychological domain (P = 0.006), as well as on the "difficulty eating" (P = 0.007), and "difficulty sleeping" (P = 0.023) items. CONCLUSION: The presence of untreated dental caries among Brazilian children was associated with an impact on specific daily activities (difficulty eating and sleeping) and the psychological domain of OHRQoL.
Assuntos
Cárie Dentária , Brasil , Criança , Estudos Transversais , Índice CPO , Humanos , Saúde Bucal , Qualidade de VidaRESUMO
The objective is to estimate the prevalence of self-perception of the need for a full dental prosthesis among toothless elderly Brazilians aged 65 to 74, as well as identify the associated factors. It is a cross-sectional study based on the national survey of oral health conditions of the Brazilian population, called SB Brazil - 2010. The dependent variable was the self-perceived need for full dental prosthesis, considering the purchase of new or replacement of the existing prosthesis. Descriptive bivariate and multiple analyses were conducted on 3514 elderly people, of which 2039 (55%) elderly self-perceived the need for a full denture. The self-perception of the need for a full denture was higher among those who needed dental prosthesis and who were dissatisfied with their oral health conditions. In addition to the high prevalence of self-perception of the need for prosthesis identified, the results identified that normative and subjective conditions of oral health remained associated with this self-perception among elderly Brazilians.
Assuntos
Prótese Total , Doenças da Boca/epidemiologia , Boca Edêntula/epidemiologia , Saúde Bucal/estatística & dados numéricos , Idoso , Brasil/epidemiologia , Estudos Transversais , Inquéritos de Saúde Bucal , Autoavaliação Diagnóstica , Feminino , Humanos , Masculino , Análise Multivariada , PrevalênciaRESUMO
Resumo Propõe-se estimar a prevalência da autopercepção da necessidade de prótese dentária total entre idosos (65 a 74 anos) brasileiros desdentados, assim como identificar seus fatores associados. Trata-se de estudo transversal com base no inquérito nacional das condições de Saúde Bucal da população brasileira, denominado SB Brasil – 2010. A variável dependente foi a autopercepção da necessidade de prótese dentária total, considerando a aquisição de prótese nova ou substituição da existente. Foram conduzidas análises descritivas, bivariadas e múltiplas. Foram incluídos 3514 idosos, destes, 2039 (55,0%) perceberam a necessidade de prótese total. A autopercepção da necessidade de prótese total foi maior entre os que necessitavam de prótese dentária inferior e que estavam insatisfeitos com as suas condições de saúde bucal. Além da alta prevalência da autopercepção da necessidade de prótese identificada, os resultados permitiram identificar que condições normativas e subjetivas de saúde bucal se mantiveram associadas a esta autopercepção entre idosos brasileiros.
Abstract The objective is to estimate the prevalence of self-perception of the need for a full dental prosthesis among toothless elderly Brazilians aged 65 to 74, as well as identify the associated factors. It is a cross-sectional study based on the national survey of oral health conditions of the Brazilian population, called SB Brazil – 2010. The dependent variable was the self-perceived need for full dental prosthesis, considering the purchase of new or replacement of the existing prosthesis. Descriptive bivariate and multiple analyses were conducted on 3514 elderly people, of which 2039 (55%) elderly self-perceived the need for a full denture. The self-perception of the need for a full denture was higher among those who needed dental prosthesis and who were dissatisfied with their oral health conditions. In addition to the high prevalence of self-perception of the need for prosthesis identified, the results identified that normative and subjective conditions of oral health remained associated with this self-perception among elderly Brazilians.
Assuntos
Humanos , Masculino , Feminino , Idoso , Saúde Bucal/estatística & dados numéricos , Boca Edêntula/epidemiologia , Prótese Total , Doenças da Boca/epidemiologia , Brasil/epidemiologia , Inquéritos de Saúde Bucal , Prevalência , Estudos Transversais , Análise Multivariada , Autoavaliação DiagnósticaRESUMO
Introdução: Apesar do desenvolvimento da Odontologia Preventiva durante as últimas décadas e do advento dos implantes osseointegrados, ainda é possível encontrar indivíduos que necessitam de reabilitação com prótese total convencional. Independentemente da causa do edentulismo, desordens temporomandibulares (DTMs) podem acometer pacientes desdentados totais, portadores ou não de próteses. As Desordens Temporomandibulares podem ser definidas como um conjunto de condições dolorosas e/ou disfuncionais, que envolvem os músculos da mastigação e/ou as articulações temporomandibulares (ATMs). Objetivo: Avaliar e investigar a prevalência de DTM em indivíduos desdentados totais, de acordo com as variáveis clínicas propostas pelo método utilizado. Metodologia: A amostra da pesquisa foi constituída por 25 indivíduos desdentados totais, que foram submetidos a tratamento reabilitador com prótese total convencional dupla na Disciplina de Prótese Total. O exame seguiu o Research Diagnostic Criteria (RDC), utilizado para diagnóstico de DTM. Resultado: Dos 25 pacientes examinados, apenas um (4%) apresentou diagnóstico referente à dor miofacial. Em relação ao deslocamento de disco, o tempo de edentulismo (p=0,077) e o tempo de uso da prótese atual (p=0,077) apresentaram significância estatística, ambos apresentando cinco indivíduos com deslocamento de disco. Quanto às alterações degenerativas e/ou álgicas da ATM, o tempo de edentulismo (p=0,012) e o tempo de uso da prótese atual (p=0,012) também apresentaram resultados significativos. Conclusão: Quanto ao deslocamento de disco e às alterações degenerativas das ATMs, apenas o tempo de edentulismo e o tempo de uso das próteses atuais foram variáveis ...
Introdution: Even with the development of preventive dentistry during the last decades and the advent of dental implants, it is still possible to find patients who need rehabilitation with conventional full denture. Whatever the cause of edentulism, TMD can affect edentulous patients, with and without prostheses. The Temporomandibular Disorders can be defined as a set of painful and/or dysfunctional involving the masticatory muscles and/or temporomandibular joints. Objective: The aim of this study is to evaluate and investigate the prevalence of temporomandibular disorders in edentulous subjects, and correlate them with the clinical findings. Methodology: The research sample consisted of 25 edentulous subjects, who underwent rehabilitation treatment with conventional full denture dual discipline Prosthesis Total. The examination followed the RDC (Research Diagnostic Criteria), used for diagnosis of TMD. Result: Of the 25 patients examined, only 1 (4%) had a diagnosis related to myofascial pain. Regarding disc displacement, time of edentulism (p=0,077) and time of use of the prothesis current (p=0,077) were statistically significant, both with 5 subjects with disc displacement. As for degenerative changes and/or painful TMJ, time of edentulism (p=0,012) and time of use of the prothesis current (p=0,012) showed also significant results. Conclusion: Regarding disc displacement and degenerative changes, only the time of edentulism and time of use of denture current were clinical findings statistically significant. .
Assuntos
Articulação Temporomandibular , Distribuição de Qui-Quadrado , Prevalência , Arcada Edêntula , Prótese TotalRESUMO
Objetivo: avaliar a resistência à tração de copings fundidos cimentados sobre pilares cone-morse com diferentes alturas e diâmetros. Material e métodos: quatro grupos (G1: 3,5 mm x 4 mm; G2: 3,5 mm x 6 mm; G3: 4,5 mm x 4 mm; e G4: 4,5 mm x 6 mm) com cinco amostras cada tiveram seus copings encerados, fundidos (liga de Ni-Cr) e cimentados (Panavia F, carga de 6 Kfg durante cinco minutos) sobre os respectivos pilares já torqueados com 25 Ncm. Depois, as amostras foram imersas em água destilada a 37oC ± 2oC durante 24 horas e submetidas ao ensaio de tração até soltura das restaurações. Os dados obtidos foram analisados estatisticamente quanto ao atendimento das pressuposições de normalidade e de homogeneidade de variância, pelos testes de Shapiro-Wilk, Levene e Anova dois critérios (α=5%). Resultados: os valores (média ± desvio-padrão) de resistência à tração (em Newtons) foram: G1: 108,9 ± 37,2; G2: 168,6 ± 43,9; G3: 143,4 ± 57,1; G4: 236,8 ± 52,2. Não houve interação estatisticamente significativa entre as variáveis diâmetro e altura (p=0,446). Ao se comparar os valores de resistência à tração, notou-se efeitos estatisticamente significativos entre o diâmetro (p=0,030) e a altura (p=0,003) dos munhões cone-morse. Munhões com 4,5 mm de diâmetro proporcionaram resistência à tração significativamente superior àquela obtida na condição em que foram empregados munhões com 3,5 mm, tanto nas condições 4 mm quanto 6 mm de altura. A resistência à tração foi aumentada (37%) com munhões 4,5 mm comparados aos munhões 3,5 mm. A resistência à tração foi aumentada (60,7%) com a altura de 6 mm, comparada à altura de 4 mm. Conclusão: pilares para implantes cone-morse com maiores dimensões proporcionam maior segurança e estabilidade às coroas cimentadas sobre implantes.
Objective: to evaluate the tensile strength of cemented copings on cone-morse abutments with different heights and diameters. Material and methods: four groups (G1: 3.5 mm x 4 mm; G2: 3.5 mm x 6 mm; G3: 4.5 mm x 4 mm; and G4: 4.5 mm x 6 mm) with five samples each had their waxed copings and cast in Ni-Cr alloy, being cemented (Panavia F, 6 Kgf-load, 5 minutes) on their respective already torqued abutments (25 Ncm). Then, samples were immersed in distilled water (37oC ± 2oC) for 24 hours and subjected to the tensile test until restorations being separated. The data obtained were analyzed statistically for normality and homogeneity of variances by the Shapiro-Wilk and Levene tests. Comparisons were made using the 2-way Anova test (α=5%). Results: the values (mean ± standard deviation) of tensile strength (in Newtons) were: G1: 108.9 ± 37.2; G2: 168.6 ± 43.9; G3: 143.4 ± 57.1; G4: 236.8 ± 52.2. There was no statistically significant interaction between the variables diameter and height (p=0.446). When comparing values of tensile strength, we observed statistically significant effects for diameter (p=0.030) and height (p=0.003). Abutments with a 4.5 mm diameter provide significantly higher tensile strength to those obtained with 3.5 mm in both 4 mm and 6 mm height conditions. The tensile strength was increased (37%) for the 4.5 mm compared to the 3.5 mm condition. The tensile strength was increased (60.7%) with a height of 6 mm, compared to height of 4 mm. Conclusion: abutments for cone-morse implants with larger dimensions provide greater safety and stability for cemented crowns.
Assuntos
Humanos , Interpretação Estatística de Dados , Técnica de Fundição Odontológica , Implantação Dentária , Osseointegração , Resistência à TraçãoRESUMO
O líquen plano (LP) é uma desordem mucocutânea de etiologia ainda desconhecida, mas com evidências de associação a uma resposta imune celular mediada. Na mucosa bucal, possui várias formas clínicas, o que dificulta o seu diagnóstico. O LP é de especial interesse parao cirurgião-dentista pelo seu controverso potencial de malignização e pela possibilidade de estar associado ao vírus da hepatite C. O objetivo deste artigo é realizar uma revisão da literatura e relatar um caso clínico de líquen plano bucal (LPB), localizado em borda lateral de língua, ressaltando os aspectos clínicos e histopatológicos, importantes para o seu reconhecimento.
Lichen planus (LP) is an unknown etiology mucocutaneous disorder, thus showing evidence of association with a cell-mediated immune response. In the oral mucosa, several clinical manifestations are observed, which difficulties diagnosis. The LP is of particular interest to the dentistry practitioner due its controversial malignant potential and the possibility of being associated with hepatitis C. The aim of this article is to review and report a clinical case of oral oral lichen planus (OLP), located in tongue's lateral border, emphasizing the clinical and histopathological important for its recognition.