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1.
Pesqui. bras. odontopediatria clín. integr ; 14(3): 183-190, jul. 2014. tab, graf
Artículo en Inglés | LILACS, BBO - Odontología | ID: biblio-853658

RESUMEN

Objective:To evaluate if there is any interference when adding coffee or chocolate to cow milk in the enamel des-remineralization process (orange juice/saliva).Material and Methods:48 specimens of human enamel (4x4 mm) were included in acrylic resin, ground flat, polished and randomly divided into the following experimental groups (n = 8): G1-saliva, G2-orange juice, G3 orange juice / milk; G4-Orange Juice / Chocolate, G5-Orange Juice / Coffee + milk and G6-milk. Each group was immersed for 60 seconds on each solution proposed and then immersed for 30 minutes in saliva. This cycle was repeated 4 times. Prior to these cycles, the Knoop microhardness average of each specimen was obtained. After the challenges proposed, the final microhardness average was calculated. The values obtained from the difference between the initial and final microhardness were subjected to ANOVA followed by Tukey test (p <0,05).Results:The orange juice had the highest change in microhardness and statistically different from all other groups. The microhardness change was statistically similar in the groups submitted to orange juice followed by immersion in milk, in chocolate and in the mixture milk + coffee. The pure milk and saliva caused no change in surface hardness of enamel.Conclusion:Milk or the addition of chocolate and coffee to milk was able to produce aprotective effect of the enamel surface against an erosive challenge


Asunto(s)
Esmalte Dental , Desgaste de los Dientes , Erosión de los Dientes/etiología , Leche , Análisis de Varianza , Brasil , Técnicas In Vitro/métodos
2.
Braz Oral Res ; 292015.
Artículo en Inglés | MEDLINE | ID: mdl-26176359

RESUMEN

Hyposalivation and dental root exposure in the elderly are problems that require special oral care. In this context, the characteristics of certain toothpastes are of particular importance. Thus, the aim of this study was to evaluate the cytotoxicity and dentin wear caused by seven different toothpastes. For dentin wear analysis, 40 root dentin specimens were submitted to 20,000 brushing cycles with the different toothpastes and distilled water (control group-CG), using a brushing machine. Dentin surface loss (SL) was measured by contact profilometer. The cytotoxicity of each toothpaste was tested using cultured fibroblasts submitted to a cell-culture-conditioned medium. Fresh medium served as the control. Cell viability was assessed by MTT assay after 24 h of contact with the conditioned media. The data were analyzed statistically by ANOVA, followed by Tukey's test (p < 0.05). The SL of the CG was minimal and significantly lower than that of the Oral B Pro Health (OBPH) group (p < 0.05). All other groups presented SL in between that of the CG and the Oral B Pro Health OBPH group, except for the Sensodyne (SEN) group, which presented SL similar to that of CG (p = 0.05). The SEN group presented a percentage of viable cells similar to that of CG: between 60-89%. All the other toothpastes showed high cytotoxicity, with cell viability less than 50% of the CG. Considering study limitations, we concluded that only one of the seven tested toothpastes exhibited the most desirable toothpaste characteristics for the worldwide growing elderly population (e.g. low cytotoxicity and low-abrasive potential).


Asunto(s)
Dentina/efectos de los fármacos , Fibroblastos/efectos de los fármacos , Desgaste de los Dientes/inducido químicamente , Pastas de Dientes/química , Pastas de Dientes/toxicidad , Anciano , Análisis de Varianza , Supervivencia Celular/efectos de los fármacos , Células Cultivadas , Dentina/química , Formazáns , Humanos , Ensayo de Materiales , Propiedades de Superficie/efectos de los fármacos , Sales de Tetrazolio , Factores de Tiempo , Cepillado Dental
3.
Braz. oral res. (Online) ; 29(1): 1-7, 2015. tab, ilus
Artículo en Inglés | LILACS | ID: lil-777237

RESUMEN

Hyposalivation and dental root exposure in the elderly are problems that require special oral care. In this context, the characteristics of certain toothpastes are of particular importance. Thus, the aim of this study was to evaluate the cytotoxicity and dentin wear caused by seven different toothpastes. For dentin wear analysis, 40 root dentin specimens were submitted to 20,000 brushing cycles with the different toothpastes and distilled water (control group-CG), using a brushing machine. Dentin surface loss (SL) was measured by contact profilometer. The cytotoxicity of each toothpaste was tested using cultured fibroblasts submitted to a cell-culture-conditioned medium. Fresh medium served as the control. Cell viability was assessed by MTT assay after 24 h of contact with the conditioned media. The data were analyzed statistically by ANOVA, followed by Tukey’s test (p < 0.05). The SL of the CG was minimal and significantly lower than that of the Oral B Pro Health (OBPH) group (p < 0.05). All other groups presented SL in between that of the CG and the Oral B Pro Health OBPH group, except for the Sensodyne (SEN) group, which presented SL similar to that of CG (p = 0.05). The SEN group presented a percentage of viable cells similar to that of CG: between 60-89%. All the other toothpastes showed high cytotoxicity, with cell viability less than 50% of the CG. Considering study limitations, we concluded that only one of the seven tested toothpastes exhibited the most desirable toothpaste characteristics for the worldwide growing elderly population (e.g. low cytotoxicity and low-abrasive potential).


Asunto(s)
Anciano , Humanos , Dentina/efectos de los fármacos , Fibroblastos/efectos de los fármacos , Desgaste de los Dientes/inducido químicamente , Pastas de Dientes/química , Pastas de Dientes/toxicidad , Análisis de Varianza , Células Cultivadas , Supervivencia Celular/efectos de los fármacos , Dentina/química , Formazáns , Ensayo de Materiales , Propiedades de Superficie/efectos de los fármacos , Sales de Tetrazolio , Factores de Tiempo , Cepillado Dental
4.
São Paulo; s.n; 2014. 86 p. ilus, tab, graf. (BR).
Tesis en Portugués | LILACS, BBO - Odontología | ID: biblio-867204

RESUMEN

O número de idosos vem crescendo em todo o mundo devido a um aumento na expectativa de vida e diminuição da taxa de natalidade. Concomitantemente, os avanços da ciência e da tecnologia na área da saúde poderiam contribuir para a manutenção de dentes por períodos mais prolongados, gerando um crescente número de idosos com dentes na boca. O objetivo dessa pesquisa foi conhecer a condição dentária e restauradora de pacientes idosos de um centro público que oferece tratamento dentário em São Paulo, Brasil. Materiais e métodos: Foram avaliados pacientes (60 anos ou mais) que compareceram ao serviço de triagem do CRI-Norte. Todos os pacientes foram entrevistados inicialmente (dados pessoais, história odontológica, hábitos de higiene). Pacientes dentados foram submetidos a um exame clínico: dentes perdidos, condição dos dentes e restaurações presentes. Para comparação foram utilizados os testes ANOVA e Qui-quadrado (p<0.05). Resultados: Foram avaliados 177 pacientes desdentados (54%) e 148 dentados, sendo 66% do sexo feminino e 34% masculino. 49,8% possuíam entre 60-69 anos e 63% nasceram na Região Sudeste. 73% dos pacientes não se consultavam com um dentista durante a infância, nem possuíam o hábito de realizar consultas periódicas durante a vida adulta (72%). Pacientes dentados (20%) frequentaram o consultório odontológico mais regularmente que os desdentados (8%). 80% dos pacientes dentados relataram escovar os dentes de 1 a 2 vezes por dia e 64% não fazem uso do fio dental. 32% dos pacientes apresentavam entre 5 e 19 dentes e apenas 6,5% apresentavam mais de 20 dentes na boca. Dentre os pacientes desdentados, 70% eram mulheres e 30% eram homens


O CPOD encontrado foi de 26, com predominância do componente perdido (média=21). Dentes inferiores anteriores são os mais retidos pela população idosa (41%). 14,6% dos dentes avaliados apresentaram lesão cariosa (63% lesões coronárias e 37% radiculares). A face coronária mais atingida por cárie foi a mesial (27%). 33% dos dentes presentes apresentaram restaurações sendo 60% satisfatórias e 40% insatisfatórias. 41% das restaurações de amálgama apresentaram-se satisfatórias com diferença estatística comparada a resina composta (13%). Em relação às faces coronárias restauradas, a oclusal foi a que mais apresentou essa condição (31%). Os pré molares foram os dentes com mais restaurações radiculares (48%). 40% dos pacientes apresentaram lesão cervical não cariosa (54% das lesões ocorreram em dentes anteriores), Pré molares (38%) e incisivos (34%) são os dentes mais atingidos por esse tipo de perda de estrutura. Em relação ao desgaste incisal/oclusal, 73% dos pacientes apresentaram essa condição (98% das lesões ocorreram em dentes anteriores). Conclusão: Conclui-se que no serviço público o número de pacientes idosos totalmente desdentados é relevante. Uma pequena parcela dos pacientes apresenta mais que 20 dentes, sendo que muitas restaurações não apresentam-se satisfatórias. O amálgama é a restauração que mais se manteve satisfatoriamente. Uma maior atenção deve ser dada aos tratamentos realizados e à conservação deles na população idosa


The number of elderly people is increasing all over the world due to increased life expectancy and decreasing birth rate. Simultaneously, the progress of science and technology in health could contribute to the maintenance of teeth in the mouth for longer periods, generating an increasing number of older patients with teeth in the mouth.Objective: Identify the restorative and dental status of elderly patients at a public service in Sao Paulo-Brazil. Methods: Patients (60 years or older) who attended the dental service of CRI-Norte, in São Paulo, Brazil were evaluated. They were submitted to an initial interview which consisted in: personal data, dental history and hygienic habits. Dentate patients were submitted to a clinical examination to evaluate the status of the remaining teeth and conditions of restorations. ANOVA and Chi-square tests (p <0.05) were used for comparison. Results: 177 edentulous and 148 dentate patients were evaluated (66% female and 34% male). 49.8% were 60-69 years old and 65% were born in Southeastern Brazil. 73% had not been to a dental office during childhood and 72% had not regularly been to the dentist's in adult life. 20% of dentate and 8% of edentulous attended a dental office regularly. 80% of dentate brushed their teeth 1-2x per day and 64% did not use dental floss. 32% of patients had 5-19 teeth and 6.5% had over 20 teeth. 41% were anterior mandibular teeth


The number of decayed, missing and filled teeth was 26, with prevalence of missing component (mean =21); 14,6% had caries (37% radicular). 33% of the teeth presented restorations (40% unsatisfactory). 41% of amalgam restorations were satisfactory with statistical difference from composite resin (13%). Pre molars were the most radicular restored teeth (48%) with statistical difference between other teeth. 40% of patients presented non-carious lesions; 73% presented incisal/occlusal wear (98% anterior teeth). Conclusion: The number of edentulous patients is relevant. Few patients have more than 20 teeth, and many restorations are not satisfactory. Amalgam is the material that presented the best survive hability. Greater attention should be given to the performed dental treatments and their conservation in the elderly population, increasing their quality of oral health


Asunto(s)
Humanos , Masculino , Femenino , Anciano , Cuidado Dental para Ancianos/estadística & datos numéricos , Caries Dental/diagnóstico , Caries Radicular/diagnóstico
5.
Photomed Laser Surg ; 31(6): 274-82, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23675985

RESUMEN

OBJECTIVE: The objective of this in vitro study was to evaluate the immediate and short-term effects of laser neodymium-doped yttrium aluminum garnet (Nd:YAG) irradiation and in-office desensitizing treatment on dentin tubule occlusion. BACKGROUND DATA: Literature shows a lack of long-lasting treatments for dentin hypersensitivity. METHODS: Forty-eight dentin slabs (4×4×2 mm) were ground flat, polished, and treated with 27% ethylenediaminetetraacetic acid (EDTA) to open the dentinal tubules. Specimens were randomly divided into the following experimental groups (n=12): Group 1: Control (no treatment); Group 2: Nd:YAG laser irradiation (100 mJ, 85 J/cm(2) per pulse with a quartz fiber of 400 µm, in scanning movements); Group 3: In-office prophylaxis with pumice; Group 4: In-office Colgate Sensitive Pro-Relief™ Desensitizing Paste. Treatments were performed according to the manufacturer's instructions. After treatment, the specimens were submitted to a sequence of erosive and abrasive challenges, twice a day for 5 days. The specimens were qualitatively and quantitatively evaluated by scanning electron microscopy immediately after treatment and after 4 and 5 days. The response variable was the amount of occluded dentin tubules per area, determined by three different examiners with the use of visual criteria, with a standardized grade created in the PowerPoint program. Data were compared with ANOVA and Tukey's test, considering a 5% significance level. RESULTS: Immediately after treatment, a reduction in the number of opened dentin tubules was observed for the laser group when compared with the control group (p<0.05). After the experimental procedures, there were no quantitative differences between the amount of opened dentin tubules for all groups; however, micrographs showed some qualitative tubule occlusion for the laser group after the erosive/abrasive challenge. CONCLUSIONS: only laser irradiation was capable of immediately sealing the dentinal tubules; however, none of the treatments showed efficacy in maintaining tubule occlusion after the chemical and mechanical challenges.


Asunto(s)
Desensibilizantes Dentinarios/administración & dosificación , Láseres de Estado Sólido , Fosfatos de Calcio/farmacología , Mezclas Complejas , Consultorios Odontológicos , Dentífricos , Desensibilizantes Dentinarios/uso terapéutico , Sensibilidad de la Dentina , Ácido Edético , Humanos , Ensayo de Materiales , Microscopía Electrónica de Rastreo , Tercer Molar , Ácidos Fosfóricos/farmacología , Compuestos de Potasio , Factores de Tiempo
6.
São Paulo; s.n; 2011. 80 p. ilus, tab, graf. (BR).
Tesis en Portugués | BBO - Odontología | ID: biblio-865858

RESUMEN

A radiopacidade é um importante pré-requisito para materiais utilizados como base e forramento de restaurações, pois possibilita que o profissional identifique a presença do material e permita sua diferenciação com a estrutura dental adjacente. O objetivo desse estudo foi avaliar a radiopacidade de materiais indicados como base e forramento e comparar com a radiopacidade do esmalte, dentina e escala de alumínio. Para isso, foram analisadas 16 marcas comerciais de cimento de ionômero de vidro, 8 marcas de resina composta flow e 4 marcas de cimento de hidróxido de cálcio. Foram confeccionados três conjuntos de três corpos de prova de 4 mm de diâmetro, com espessuras de 1, 2 e 3 mm para cada cimento de ionômero de vidro e resina composta flow e de 1 mm para cada cimento de hidróxido de cálcio. Foram feitas secções transversais de coroas de três terceiros molares humanos para obtenção de espécimes de esmalte e dentina com espessura de 1, 2 e 3 mm. Como controle, uma escala de alumínio padrão com nove degraus de espessura foi utilizada. As tomadas radiográficas foram feitas com o sistema digital RVG 5000 Kodak (Kodak Company, França) e tempo de exposição de 0.32 segundos. As imagens obtidas foram trabalhadas no programa Image Tool® para obtenção dos valores médios de cinza. A análise estatística ANOVA,


seguida pelo teste de Tukey (p0.05) detectou diferenças consideráveis entre os materiais da mesma categoria e entre as espessuras. Algumas marcas comerciais apresentaram radiopacidade inadequada segundo as normas ISO 4049 e 9917 (Ionomaster, Maxxion, Bioglass R, Bioglass F, Vidrion R e Vidrion F), apresentando radiopacidade inferior à da dentina, insuficiente para um correto diagnóstico. Todas as resinas compostas flow e cimentos de hidróxido de cálcio estudados apresentam radiopacidade superior a da dentina. As marcas comerciais Vitro Fil, Magic Glass, Vitrebond, Riva SC, Riva LC, Fill Magic, Opallis, Surefil Tetric N, Tetric, Hydro C, Hydcal e Liner apresentaram radiopacidade igual ou superior a do esmalte, em todas as espessuras. De um modo geral, o aumento de espessura dos materiais estudados aumenta significativamente sua radiopacidade. Conclui-se que existem materiais indicados como base e forramento de restaurações com radiopacidade inadequada para serem detectados radiograficamente.


Radiopacity is an important pre-requisite for base and liner materials, once it allows the professional to identify the presence of the material and makes its differentiation from the adjacent tooth structure possible. The aim of this study was to evaluate the radiopacity of liner and base materials and compare to the radiopacity of enamel, dentin and aluminum stepwedge. For this, 16 glass ionomer cements, 8 flowable resin composites and 4 calcium hydroxide cements were analysed. It was prepared three sets of three test specimens with 4 mm in diameter and thicknesses of 1, 2 and 3 mm for each glass ionomer cement and flowable composite and 1 mm for each calcium hydroxide cement. Cross sections were made from crowns of three third molars to obtain specimens of enamel and dentin with thickness of 1, 2 and 3 mm. As a control, a standard aluminum stepwedge with nine steps was used. Radiographs were taken with digital Kodak RVG 5000 (Kodak Company, France) and exposure time of 0.32 seconds. The images were analysed through the program Image Tool ® to obtain the mean grey values. Statistical test ANOVA followed by Tukey test (p 0.05) detected significant differences between the materials of the same category and between the thicknesses.


The commercial brands Ionomaster, Maxxion, Bioglass R, Bioglass F, Vidrion R and Vidrion F, presented radiopacity lower than the radiopacity of dentin, insufficient for a correct diagnostic. All flowable resin composites and calcium hydroxide cements studied showed radiopacity superior than dentin. Vitro Fil, Magic Glass, Vitrebond, Riva SC, Riva LC, Fill Magic, Opallis, Surefil, Tetric N, Tetric, Hydro C, Hydcal and Liner showed radiopacity equal to or greater than the enamel for all thicknesses. In general, the increased thickness of the materials studied increases its radiopacity significantly. It was concluded that some materials indicated as base and liner for restorations have and inadequate radiopacity to be detected radiographically.


Asunto(s)
Resinas Compuestas , Hidróxido de Calcio/uso terapéutico , Intensificación de Imagen Radiográfica/métodos , Restauración Dental Provisional/métodos
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