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1.
Eur J Dent ; 13(2): 222-228, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31574541

RESUMO

OBJECTIVES: The aim of this study was to evaluate the bonding strength of self-adhesive luting cement to zirconia under different surface treatments. MATERIALS AND METHODS: Thirty-two zirconia samples were randomly divided into eight experimental groups based on the surface treatment employed (Control: no surface treatment; PMM: wear with diamond bur; JAT: blasting with glass beads; PMA: wear with a medium-roughness milling machine; Primer: primer application on the surface without treatment; PMM +Primer: PMM treatment plus primer application; JAT+Primer: JAT treatment plus primer application; and PMA+Primer: PMA treatment plus primer application). Cement cylinders were built on the ceramic surfaces, and the groups were subdivided according to the storage time employed (i.e., 24 hours or 60 days). After storage, the samples were subjected to microshear testing. STATISTICAL ANALYSIS: The Kruskal-Wallis test followed by the Dunn test was employed for comparison between the groups (p < 0.05). RESULTS: The PMM group yielded the optimal results and the mean values increased after both storage times following the primer application. The Control, PMA, and JAT groups gave similar results after 24 hours, while the JAT group gave superior results following primer application over this storage time. After 60 days of storage, all groups gave improved results following chemical treatment with a primer. CONCLUSION: It was concluded that mechanical preparation using the diamond bur followed by primer application significantly improved the bond strength between the ceramic and the luting cement.

2.
Eur J Dent ; 13(1): 5-10, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31170756

RESUMO

OBJECTIVE: This study evaluates the bond strength of two compositions of aesthetic translucent zirconia (TZ). MATERIALS AND METHODS: For this evaluation, test specimens were prepared from ICE Zirkon TZ and Prettau Anterior zirconia (PAZ) that were stored in distilled water at 37°C for two time periods: T1 (24 h) and T2 (90 days) to simulate aging. Two factors were evaluated for the samples-ceramic and aging time. The samples were subjected to tests of microshear strength and fracture type and were evaluated using scanning electron microscopy. RESULTS: The results were analyzed using the D'Agostino test, analysis of variance, and Tukey's test (p < 0.01). Statistically significant differences were observed for ceramic type and aging time. CONCLUSION: The results showed that PAZ provides significantly superior performance to TZ at the two aging times evaluated.

3.
Complement Ther Med ; 42: 340-346, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30670264

RESUMO

OBJECTIVES: This study evaluated the effects of low-power laser auriculotherapy (LA) on the physical and emotional symptoms of patients with temporomandibular disorders (TMDs), in comparison with occlusal splints (OS). DESIGN: Randomized, blinded, prospective, non-inferiority clinical trial. INTERVENTIONS: The patients received OS (control group) or LA (experimental group). MAIN OUTCOME MEASURES: Following the Consolidated Standards of Reporting Trials (CONSORT) guidelines, patients with TMD were evaluated by using axes I and II of the Research Diagnostic Criteria for RDC-TMD. Both intra- and intergroup quantitative variables were analyzed with ANOVA (p < 0.05), while qualitative variables were analyzed with the Kruskal-Wallis (intergroup evaluations; p < 0.05) or Mann-Whitney tests (intragroup analyses; p < 0.05). RESULTS: OS improved five physical symptoms of TMD (pain in the right temporal muscle, right and left masseter muscles, left joint, and left intraoral region), while LA improved six (jaw functioning; pain in left masseter muscle, right and left joints, and right and left intraoral regions). Similarly, OS improved seven emotional symptoms (degree of depression, degree of non-specific physical symptoms, excluding pain, degree of non-specific physical symptoms including pain, average pain value in the past 6 months, presence of depression, intensity and characteristics of pain, non-specific physical symptoms including pain), while LA improved five (degree of non-specific physical symptoms including pain, presence of depression, intensity and characteristics of pain, non-specific physical symptoms including pain, non-specific physical symptoms excluding pain). CONCLUSION: LA improved the physical and emotional symptoms of TMD, with results similar to OS. CLINICAL RELEVANCE: For the physical and emotional symptoms associated with TMD, LA showed similar outcomes as OS.


Assuntos
Auriculoterapia , Depressão/prevenção & controle , Emoções , Terapia com Luz de Baixa Intensidade , Manejo da Dor , Dor/etiologia , Transtornos da Articulação Temporomandibular/terapia , Adulto , Depressão/etiologia , Feminino , Humanos , Arcada Osseodentária/patologia , Pessoa de Meia-Idade , Músculo Esquelético/patologia , Placas Oclusais , Dor/psicologia , Medição da Dor , Método Simples-Cego , Transtornos da Articulação Temporomandibular/complicações , Transtornos da Articulação Temporomandibular/psicologia , Resultado do Tratamento
4.
Rev. odontol. UNESP (Online) ; 48: e20170094, 2019. tab, graf
Artigo em Inglês | LILACS-Express | ID: biblio-991491

RESUMO

Abstract Introduction Adhesive technology has been developed quickly since its introduction about fifty years ago. Its goal is to produce a close contact within enamel and dentin. Failures in this process could result in microleakage, and allow the infiltration of bacteria, fluids and ions. Recent studies have been shown the use of chlorhexidine associated with adhesive systems can be able to inhibit the bacteria action. Objective The aim of this study was to evaluate the addiction of different percentages of chlorhexidine to a self-etch adhesive. Methodology The solution of digluconatechlorhexidine was increased to the primer of the two pass self etch adhesive to create a 0.5%, 1.0% and 2.0% chlorhexidine primer solution and after they were distributed in four groups (G1, G2, G3 and G4). Saliva samples (N=10) were used to test bacteria activity. Result They were spread in a blood medium with filter paper disks containing the different treatments. After the incubation, the inhibitions halos formation were evaluated. Conclusion This study demonstrated that, in vitro, the addition of different percentages of chlorhexidine digluconate to the self-etch adhesive induced inhibited halos at bacteria of saliva samples, independent from their concentration.


Resumo Introdução A tecnologia adesiva vem se desenvolvendo rapidamente desde que foi introduzida há mais de 50 anos. O principal objetivo da adesão é alcançar um íntimo contato entre a estrutura dental e o material restaurador e fornecer adequada união entre o esmalte e a dentina. Objetivo A proposta deste estudo foi avaliar o efeito antibacteriano de um adesivo auto-condicionante de dois passos associado a diferentes concentrações de solução de digluconato de clorexidina (DCHX). Metodologia A solução de digluconato de clorexidina a 20% foi adicionada ao primer do sistema adesivo nas concentrações de 0,5, 1,0 e 2,0% e distribuídas em quatro grupos (G1, G2, G3 e G4). Para o teste de atividade antibacteriana foram utilizadas amostras de saliva (N=10) semeadas em meio de ágar sangue e discos de papel filtro contendo os diferentes grupos. Após incubação, as amostras foram inspecionadas quanto à formação de halo de inibição dos microrganismos através da utilização do paquímetro digital de precisão (0,0001mm) (Mitutoyou Sul Americana Ltda/ Starret Tools ®). Resultado Halos de inibição foram encontrados ao redor de todos os discos de filtro em que foram aplicados o primer acrescido de clorexidina mais o adesivo, bem como ao redor dos discos do controle positivo. Ao redor dos discos do controle negativo e dos discos com primer e adesivo não modificado não foram observados halos de inibição. Conclusão Este trabalho demonstrou que, in vitro, a adição de diferentes concentrações de digluconato de clorexidina ao sistema adesivo produziu halo de inibição dos microrganismos presentes nas amostras de saliva, independente da concentração utilizada.

5.
RFO UPF ; 23(3): 353-360, 18/12/2018.
Artigo em Português | LILACS-Express | ID: biblio-995411

RESUMO

Objetivo: realizar uma revisão de literatura sobre materiais, técnicas de confecção, vantagens, desvantagens e limitações das restaurações cerâmicas multicamadas e monolíticas. Revisão de literatura: embora as cerâmicas odontológicas sejam utilizadas para confecção de restaurações dentárias indiretas, porque têm excelentes propriedades mecânicas e estéticas, são materiais sus-ceptíveis à fratura sob forças oclusais. Para compensar essa fragilidade, restaurações multicamadas são confeccionadas associando um material mais resistente para a infraestrutura e a posterior aplicação de cerâmica para recobrimento estético. Porém, as restaurações multicamadas apresentam como desvantagem o possível lasca¬mento da cerâmica de recobrimento. Essas falhas com¬prometem a restauração funcional e a estética, exigindo a substituição da peça protética em muitos casos. Sendo assim, devido à evolução de sistemas cerâmicos e técnicas de processamento, surgiram as restaurações cerâmicas monolíticas fabricadas com um único material, a fim de superar tal limitação. Nesse sentido, diferentes materiais e técnicas são apresentados na literatura para a confecção de restaurações cerâmicas monolíticas. Considerações finais: as restaurações multicamadas têm bom resultado estético, porém podem apresentar lasca¬mento da cerâmica de recobrimento. Essa limitação é superada pelo uso de um único material para as restaurações monolíticas, mas o resultado estético pode ser limitado. De um modo geral, a literatura demonstra um bom comportamento clínico para as restaurações cerâmicas multicamadas e monolíticas, quando a técnica de confecção e o sistema cerâmico são bem indicados.

6.
Rev. odontol. UNESP (Online) ; 47(6): 395-399, nov.-dez. 2018. tab
Artigo em Inglês | LILACS-Express | ID: biblio-985733

RESUMO

Abstract Introduction There is a growing demand for aesthetic restorations and the polymerized composite resins are the most used material in these procedures. In order to achieve greater resistance to solubilization proper polymerization is required. Objective Evaluate the influence of three photoactivation techniques, on sorption and solubility of three composite resins. Materials and methods 90 test samples measuring 8 mm diameter and 1 mm thick were made and divided into 9 groups (n=10) of resins -Filtek Z350 XT, Tetric N-Ceram and IPS Empress Direct, each of them was polymerized with LED Bluephase, using the techniques: Conventional, Soft-Start (SS) and Pulse Delay (PD). Afterwards they were placed in desiccator with silica gel at 98.6 F and weighed daily until obtaining a constant mass (m1). Then they were immersed in deionized water for seven days and weighed again (m2). The test sample reconditioning was performed using the m1 procedure, until a constant mass (m3 ) was obtained. The sorption and solubility values were calculated and subjected to ANOVA test (two-way), followed by Tukey post hoc, p<0.05. Result There were no statistically significant differences in sorption and solubility among the studied resins when photoactivation techniques were compared. For solubility analysis, statistically significant differences were observed among the materials. The results for composite resin Filtek Z350 XT presented higher statistical hybridization values than those of the other evaluated resins. Conclusion The different forms of photoactivation had no influence on the sorption and solubility of the tested composite resins.


Resumo Introdução Há uma crescente demanda por restaurações estéticas, sendo as resinas compostas polimerizadas o material mais utilizados nesses procedimentos. Visando uma maior resistência à solubilização, uma polimerização adequada é necessária. Objetivo Avaliar a influência de três técnicas de fotoativação na sorção e na solubilidade de três resinas compostas. Material e método Foram confeccionados 90 corpos-de-prova, com 8 mm de diâmetro e 1 mm de espessura, divididos em 9 grupos (n = 10) de resinas - Filtek Z350 XT, Tetric N-Ceram e IPS Empress Direct, cada uma elas polimerizada com LED Bluephase, utilizando as técnicas: Convencional, Soft-Start (SS) e Pulse Delay (PD). Posteriormente foram colocadas em dessecador com sílica gel a 98,6 F e pesadas diariamente até obtenção de massa constante (m1). Depois foram imersos em água desionizada durante sete dias e pesados ​​novamente (m2). O recondicionamento da amostra de teste foi realizado utilizando o procedimento m1, até que uma massa constante (m3) fosse obtida. Os valores de sorção e solubilidade foram calculados e submetidos ao teste ANOVA (two-way), seguido por Tukey post hoc, p <0,05. Resultado Não houve diferenças estatisticamente significantes para sorção e solubilidade nas resinas estudadas quanto as técnicas de fotoativação. Para análise de solubilidade, foram observadas diferenças estatisticamente significantes entre os materiais. Os resultados para resina compostaFiltek Z350 XT apresentaram valores de hibridação estatísticos superiores aos das outras resinas compostas avaliadas. Conclusão As diferentes formas de fotoativação não influenciaram a sorção e solubilidade das resinas compostas testadas.

7.
ROBRAC ; 27(83): 234-238, out./dez. 2018. tab
Artigo em Português | LILACS-Express | ID: biblio-997246

RESUMO

Objetivo: Avaliar a influência de diferentes soluções de irrigação cavitária sobre a resistência de união de um cimento resinoso de dupla polimerização. Material e Método: A partir de incisivos bovinos, foram obtidos 4 grupos (n=15), divididos aleatoriamente de acordo com a solução irrigadora empregada na limpeza cavitária, sendo: G0 - soro fisiológico + condicionamento ácido; G1 ­ EDTA + condicionamento ácido; G2 - Clorexidina 2% + condicionamento ácido + clorexidina 2% e G3 - soro fisiológico + condicionamento ácido + clorexidina 2%. Foram confeccionados cilindros de cimento resinoso para cada coroa, utilizando-se uma matriz de Tygon com diâmetro interno de 1 mm e altura de 2 mm. O teste de resistência adesiva por microcisalhamento foi realizado após 3 meses de armazenamento dos espécimes em soro fisiológico a 37ºC. Os dados foram submetidos ao teste de Kruskall-Wallis, seguido do teste de Dunn (p<0,05). Resultados: Os grupos G0, G1 e G3 não apresentaram diferenças significativas entre si (p>0,05). Os menores valores foram observados no grupo G2 (p<0,05). Conclusões: As soluções irrigadoras EDTA e soro fisiológico utilizadas previamente ao condicionamento ácido da dentina não interferiram, significativamente, na resistência de união, porém, a solução de clorexidina utilizada após o condicionamento ácido influenciou negativamente nos valores de resistência de união.


Objectives: This study aimed to evaluate the influence of different cavity irrigation solutions on the bond strength of a dual-curing resin cement. Methods: From bovine incisors, 4 groups (n=15), were randomly divided according to the irrigating solution for cavity cleaning: G0 ­ saline + acid etching; G1 ­ EDTA + acid etching; G2: Chlorhexidine 2% + acid etching + Chlorhexidine 2%; and G3 ­ Saline + acid etching + Chlorhexidine 2%. Resin cement cylinders were made for each crown, using a Tygon matrix with internal diameter of 1 mm and height of 2 mm. The specimens were stored for 3 months at 37oC, and then subjected to microshear tests. Data were statistically analyzed by Kruskal-Wallis test followed by Dunn (p<0.05). Results: There were no statistically significant differences between G0, G1 and G3 groups (p>0.05). The lowest values were observed in G2 group (p<0.05). Conclusion: The irrigation solutions EDTA and saline used before to the acid etching of dentin did not interfere, significantly, in the bond strength, however, the solution of chlorhexidine used after the acid etching influenced negatively.

8.
Prosthes. Esthet. Sci ; 7(27): 66-71, abr.-jun. 2018. tab
Artigo em Português | BBO - Odontologia | ID: biblio-906957

RESUMO

As restaurações provisórias têm papel importante para diagnóstico e plano de tratamento em reabilitação com prótese fixa. Quando há necessidade de procedimentos cirúrgicos pré-protéticos, meios adicionais de controle de placa bacteriana devem ser indicados, mas pouco se sabe sobre os efeitos que podem produzir na superfície de restaurações provisórias. Proposição: este estudo teve como objetivo avaliar o efeito de dois enxaguatórios bucais na dureza de duas resinas usadas para confecção de provisórios protéticos. Material e Métodos: resina acrílica autopolimerizável poli(metil metacrilato) Dencrilay Speed e resina bisacrílica Protemp 4; dois enxaguatórios bucais, Periogard (digluconato de clorexidina 0,12%) e Oral-B sem álcool, tendo soro fisiológico como grupo controle. Foram confeccionadas 60 amostras, 30 para cada resina, as quais foram divididas em 6 grupos experimentais (n=10). As amostras foram imersas nas respectivas soluções para bochecho durante 10 minutos por dia, por um período de 30 dias. Após, foram submetidas a ensaios de microdureza utilizando o penetrador tipo Knoop. Resultados: a resina acrílica Dencrilay apresentou os maiores valores de dureza, no entanto apresentou redução na dureza quando imersa no enxaguatório Periogard. A resina bisacrílica Protemp 4 não apresentou diferença nos valores de microdureza de superfície quando imersa nas soluções utilizadas. Conclusão: a resina acrílica apresentou redução na dureza de superfície após imersão em solução de clorexidina 0,12%. Implicações clínicas: a resina bisacrílica, apesar de menor dureza, apresentaria superfície mais estável em meio bucal, mesmo com o uso diário de enxaguatórios bucais


Temporary restorations have important role for diagnosis and treatment plan in rehabilitation with fixed prosthesis element. When pre-prosthetic surgical procedures are required, additional means of controlling plaque must be indicated, but little is known about the effects it can produce on the surface of provisional prosthetic restorations. Purpose: To evaluate the effect of two mouthrinses on the hardness of two resins used in temporary restorations. Material and Method: Acrylic resin poly(methyl methacrylate) Dencrilay Speed and bisacrylic resin Protemp 4, two mouthrinses, Periogard (chlorhexidine digluconate 0.12 %) and Oral- B without alcohol and saline solution as control group. Sixty samples were prepared, 30 for each resin, which were divided into 6 groups (n = 10). The specimens were immersed in respective solutions for 10 minutes per day, for 30 days. Then, microhardness tests were performed using the Knoop indenter. Data were subjected to analysis of variance and Tukey's test, with a confidence interval of 95%. Results: Dencrilay acrylic resin had the highest values of hardness, however, it showed a reduction in hardness when immersed in the mounthrinse Periogard. The bisacrylic resin Protemp 4 showed no difference in the values of surface microhardness when immersed in the solutions used. Conclusion: The acrylic resin showed a reduction in surface hardness after immersion in 0.12% chlorhexidine solution. Clinical Implications: Bisacrylic resin, although less hard, would have a more stable surface in oral environment, even with the daily use of mouthrinses.


Assuntos
Prótese Dentária , Clorexidina/uso terapêutico , Desinfetantes/uso terapêutico
9.
J Adhes Dent ; : 475-481, 2017 Dec 18.
Artigo em Inglês | MEDLINE | ID: mdl-29255811

RESUMO

PURPOSE: To evaluate the microtensile bond strength (µTBS) of three adhesives to dentin after 1 week and 6 months in an oral environment. MATERIALS AND METHODS: Class I cavities were prepared in the third molars of 30 patients and randomized into 3 groups according to the following adhesives: Scotchbond Multi-Purpose (SM), Clearfil Protect Bond (CF), and Scotchbond Universal (UN). These molars were then subdivided into two groups according to the exposure time in the oral environment: one week (1W) and 6 months (6M). After the exposure time, the teeth were extracted, cut into beams, and submitted to the µTBS test. The data were analyzed using the Shapiro-Wilk test and two-way ANOVA followed by Tukey's post-hoc test with a significance level of 5%, and fracture modes were analyzed. RESULTS: The bond strengths in MPa (mean ± SD) were SM-1W: 39.5 ± 7.9; SM-6M: 29.7 ± 1.8; CF-1W: 30.5 ± 1.4; CF-6M: 28.6 ± 4.1; UN-1W: 30.6 ± 3.2; and UN-6M: 26.7 ± 2.0. The SM-1W group exhibited significantly increased µTBS compared with the other groups. After 6 months in the oral environment, a significant reduction of µTBS was only observed for the SM group, whereas similar bond strengths were observed for the other groups. SM-1W exhibited a predominance of mixed fractures, whereas the other groups showed a predominance of adhesive fractures. CONCLUSIONS: The adhesives which were applied in the self-etching mode maintained bond strength after six months in the oral environment. A reduction of µTBS was only observed for the three-step etch-and-rinse adhesive.

10.
J Clin Diagn Res ; 9(5): ZC94-7, 2015 May.
Artigo em Inglês | MEDLINE | ID: mdl-26155573

RESUMO

INTRODUCTION: Reduction of biofilm on dentures is important for maintaining denture wearers' health. OBJECTIVE: The aim of this study was to assess the effectiveness of toothbrush handles individually adapted in reducing of biofilm on dentures. MATERIALS AND METHODS: Study participants were 16 residents of the condo for the elderly, denture wearers, functionally independent and without cognitive impairment. Participants were randomly divided into two groups: Group 1 (adapted toothbrush handles) and Group 2 (conventional toothbrush). Biofilm from the inner surface of the basal area of the denture was observed using 5% erythrosine. Images obtained before starting the use of toothbrushes, after 7 and 21 days were sent for computer analysis. RESULTS: The average amount of biofilm on the first day was considered severe in both groups. At the end of the experiment, the average biofilm coverage in Group 1 was 44.7% (13.1% reduction) and in Group 2 it was 48.6% (4.8% reduction). However, the Friedman analysis of variance test showed that the reduction was statistically significant (p< 0.05) only in Group 1, demonstrating the effectiveness of the adapted brushes. CONCLUSION: The findings of this pilot study indicated that for the reduction of biofilm on dentures the adapted toothbrush handles were superior to the conventional type.

11.
Eur J Prosthodont Restor Dent ; 22(4): 146-51, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-26466438

RESUMO

The aim of this study was to establish relationship between restorative resin and periodontal tissues of patients with diabetes mellitus. We selected 30 patients, 15 patients with diabetes mellitus with a total of 30 restorations and 15 patients without diabetes mellitus with a total of 49 restorations and the periodontal parameters and restorations parameters were evaluated. The total period was 12 months. The results showed a significant improvement in periodontal parameters assessed (p < 0.05). It may be concluded that over the 12-month period, there was no adverse reaction to periodontal tissue as a result of various polishing regimes of a restorative resin-based composite in patients with diabetes mellitus.


Assuntos
Resinas Compostas/química , Materiais Dentários/química , Polimento Dentário/métodos , Restauração Dentária Permanente , Complicações do Diabetes , Índice Periodontal , Periodontite/terapia , Adolescente , Adulto , Idoso , Cárie Dentária/etiologia , Adaptação Marginal Dentária , Índice de Placa Dentária , Restauração Dentária Permanente/normas , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Perda da Inserção Periodontal/classificação , Perda da Inserção Periodontal/terapia , Bolsa Periodontal/classificação , Bolsa Periodontal/terapia , Propriedades de Superfície , Desgaste dos Dentes/terapia , Adulto Jovem
12.
Gen Dent ; 61(4): 10-3, 2013 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23823336

RESUMO

Disinfecting dental impressions is necessary to decrease the risk of cross-contamination in dental offices. Ultrasonic nebulization has been mentioned as a microbicidal technique that can be used to disinfect contaminated dental impressions. This study compared the microbicidal effect of 2% glutaraldehyde and 0.2% peracetic acid for the disinfection of dental impressions made with vinyl polysiloxane, using 2 disinfection methods: immersion and ultrasonic nebulization. Bactericial efficacy was examined using Staphylococcus aureus and Bacillus atrophaeus as indicators. Thirty impressions were obtained and distributed randomly in 5 groups (n = 6). Group 1 was immersed in 2% glutaraldehyde immersion for 10 minutes, Group 2 was immersed in 0.2% peracetic acid for 10 minutes, Group 3 underwent ultrasonic nebulization for 10 minutes in 2% glutaraldehyde solution, Group 4 underwent ultrasonic nebulization for 10 minutes in 0.2% peracetic acid solution, and Group 5 was a control group that received no disinfectant. Both solutions experienced a 100% reduction in microorganisms following ultrasonic nebulization, as did peracetic acid following immersion; however, immersion in glutaraldehyde demonstrated lower values of reduction in B atrophaeus group, with a statistically significant difference compared with the other experimental groups.


Assuntos
Desinfetantes de Equipamento Odontológico , Materiais para Moldagem Odontológica , Técnica de Moldagem Odontológica , Desinfetantes , Desinfecção , Glutaral , Staphylococcus aureus , Ultrassom
13.
Rev. odontol. UNESP (Online) ; 42(2): 83-88, mar.-abr. 2013. tab
Artigo em Português | LILACS-Express | ID: lil-674668

RESUMO

INTRODUÇÃO: A contaminação do substrato dentinário pode interferir na qualidade de união entre materiais adesivos e o dente. OBJETIVO: Investigar a influência de diferentes soluções de irrigação na resistência de união de um cimento resinoso. MATERIAL E MÉTODO: Foram selecionadas 40 coroas dentais bovinas, divididas em quatro grupos: G0 = soro; G1 = clorexidina; G2 = EDTA; G3 = clorexidina 0,12%, após condicionamento ácido. Em seguida, foram confeccionados cilindros de cimento resinoso utilizando-se uma matriz de Tygon com diâmetro interno de 1 mm e 2 mm de altura. A fotoativação foi realizada por aparelho de luz LED com 900 mW/cm² por 40 segundos. Foram confeccionados quatro cilindros de cimento resinoso para cada coroa bovina, totalizando 40 corpos de prova de cimento resinoso para cada grupo avaliado. O teste de resistência adesiva por microcisalhamento foi realizado após 24 horas. Decorrido esse período, os cilindros de cimento resinoso foram testados em uma máquina universal de ensaios (EMIC). Os dados obtidos foram submetidos à análise estatística pelos testes ANOVA e Tukey (p = 0,001). RESULTADO: Não houve diferenças estatisticamente significativas entre os grupos estudados, com exceção para o G3, que apresentou de forma significativa os menores valores de resistência adesiva. CONCLUSÃO: As diferentes soluções irrigadoras utilizadas previamente ao condicionamento ácido na dentina não interferem na resistência de união por microcisalhamento.


INTRODUCTION: The contamination of dentin can interfere with the quality of union between adhesives and tooth. OBJECTIVE: Was to investigate the influence of different irrigation solutions on bond strength of a resin cement. MATERIAL AND METHOD: Were selected 40 dental bovine crowns divided into four groups: G0= physiologic serum, G1= chlorhexidine, G2= EDTA, G3= 0.12% chlorhexidine after acid etching. Then the cylinders were fabricated resin cement using a matrix of Tygon with an internal diameter of 1mm and 2mm in height. The polymerization was carried out by LED light unit with 900 mW/cm² for 40 seconds. 4 cylinders were made of resin cement for each bovine crown, totaling 40 body-of-proof resin cement for each group evaluated. The test microshear bond strength was performed after 24 hours. After this period, the resin cement cylinders were tested in a universal testing machine (EMIC). Data were statistically analyzed by ANOVA and Tukey (p = 0.001). RESULT: There were no statistically significant differences between groups, except for the G3 which showed significantly lower values of bond strength. CONCLUSION: The different irrigating solutions used prior to etching dentin not interfere in the bond strength microshear.

14.
Braz. oral res ; 26(3): 263-268, May-June 2012. tab
Artigo em Inglês | LILACS | ID: lil-622943

RESUMO

The aim of this randomized, controlled, split-mouth, clinical study was to differentiate and clinically qualify the effectiveness of different desensitizing agents in the treatment of painful symptoms caused by cervical dentin hypersensitivity (CDH). Two hundred-and-fifty-two teeth of 42 patients were distributed into seven groups (n = 36): G1 - placebo; G2, G3, G4 and G6 - fluoride varnishes; G5 - sodium fluoride; G7 - potassium oxalate. Three applications were made one week apart. A three-score system (Alfa = 0, Bravo = 2, and Charlie = 3, respectively for no sensitivity, slight sensitivity and high sensitivity) was used to assess CDH after each application and after 30 days. The data were subjected to statistical analysis using the Kruskall-Wallis and Dun tests. After the second week, statistically significant differences were observed for all materials compared with the baseline. After 30 days, Group G7 had presented a significant gradual reduction along all the evaluated time intervals. It was concluded that all the desensitizing agents were capable of reducing dentin hypersensitivity, with the exception of the placebo and the sodium fluoride groups.


Assuntos
Adolescente , Adulto , Idoso , Humanos , Pessoa de Meia-Idade , Dessensibilizantes Dentinários/uso terapêutico , Sensibilidade da Dentina/tratamento farmacológico , Dentina/efeitos dos fármacos , Fluoretos/uso terapêutico , Manejo da Dor , Estatísticas não Paramétricas , Propriedades de Superfície , Fatores de Tempo , Resultado do Tratamento
15.
Braz Oral Res ; 26(3): 263-8, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22641447

RESUMO

The aim of this randomized, controlled, split-mouth, clinical study was to differentiate and clinically qualify the effectiveness of different desensitizing agents in the treatment of painful symptoms caused by cervical dentin hypersensitivity (CDH). Two hundred-and-fifty-two teeth of 42 patients were distributed into seven groups (n = 36): G1 - placebo; G2, G3, G4 and G6 - fluoride varnishes; G5 - sodium fluoride; G7 - potassium oxalate. Three applications were made one week apart. A three-score system (Alfa = 0, Bravo = 2, and Charlie = 3, respectively for no sensitivity, slight sensitivity and high sensitivity) was used to assess CDH after each application and after 30 days. The data were subjected to statistical analysis using the Kruskall-Wallis and Dun tests. After the second week, statistically significant differences were observed for all materials compared with the baseline. After 30 days, Group G7 had presented a significant gradual reduction along all the evaluated time intervals. It was concluded that all the desensitizing agents were capable of reducing dentin hypersensitivity, with the exception of the placebo and the sodium fluoride groups.


Assuntos
Dessensibilizantes Dentinários/uso terapêutico , Sensibilidade da Dentina/tratamento farmacológico , Dentina/efeitos dos fármacos , Adolescente , Adulto , Idoso , Fluoretos/uso terapêutico , Humanos , Pessoa de Meia-Idade , Manejo da Dor , Estatísticas não Paramétricas , Propriedades de Superfície , Fatores de Tempo , Resultado do Tratamento
16.
Acta Odontol Latinoam ; 25(3): 279-86, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23798074

RESUMO

Diabetes mellitus is a set of metabolic diseases characterized by hyperglycemia resulting from absolute or relative deficiency in insulin secretion by the pancreas and/or impaired insulin action in target tissues. Oral health maintenance through health care, as well as metabolic control are important measures for the overall health of diabetic patients. The objective of this study was to determine the relationship between biocompatibility of composite resin restorations with different nanoparticles, polishing in abfraction lesions in anterior and posterior teeth with periodontal tissues in patients with diabetes mellitus. We selected 20 patients--10 patients with diabetes mellitus and 10 patients without diabetes mellitus-, but with a total of 30 restorations in each group receiving composite resin restorations, who were evaluated for periodontal purposes: Plaque Index, Gingival Index; Probing Depth, Clinical Attachment Level and Bleeding on Probing. In addition, the restorations will receive assessments according to criteria for Marginal Adaptation, Anatomical Shape, Marginal Discoloration, ormation of caries, Post-operative Sensitivity and Retention. The total period was 90 days. The results showed a significant improvement in periodontal parameters assessed (p < 0.05) in both groups. With regard to assessments of the restorations, it was observed that there was no statistically significant difference (p > 0.05) among all criteria evaluated within the 90-day period. Thus, we conclude that in a short period (90 days) there is clinical biocompatibility of composite resin with nanoparticles restorations in abfraction lesions and periodontal tissues of patients with diabetes mellitus, regardless the type of polish these restorations receive.


Assuntos
Resinas Compostas , Restauração Dentária Permanente , Complicações do Diabetes/complicações , Doenças Periodontais/complicações , Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Adulto Jovem
17.
Acta Odontol Latinoam ; 24(2): 211-7, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-22165322

RESUMO

Due to the changes in the composition and processing of acrylic resins, it seems appropriate to evaluate the influence of polymerization methods about the alteration of occlusal vertical dimension and the horizontal positioning of artificial teeth of total dentures. For this, 64 specimens were made, simulating a maxillary total denture waxed from a standard maxillary denture. The experimental samples were divided into two groups: Group 1 - The resins were submitted to polymerization in a hot water bath, Group 2 - The same resins were submitted to poly-merization by microwave energy. The samples were measured horizontally and vertically before and after the polymerization process. Based on the results, it can be concluded that there was no statistically significant difference between the conventional polymerization method and the polymerization method by microwave, related to the stability of occlusal vertical dimension and horizontal positioning of artificial teeth on the specimens evaluated.


Assuntos
Prótese Total , Polimerização , Dimensão Vertical
18.
Acta Odontol Latinoam ; 24(1): 104-9, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-22010415

RESUMO

The aim of this study is to evaluate the microleakage a self-adhesive cement recently marketed Rely X U100 (3M ESPE). Thirty roots of bovine teeth with 14 mm long were restored with self-adhesive cement and Glassix fiber post DC3 (FGM). Roots were randomly divided into three groups (n=10) according to the technique of placement of the cementing agent: G1 - Centrix syringe; G2 - Lentulo drill and G3 - Manual technical. After cementation, provisional restorations were fabricated with composite resin (Opallis/FGM) without the use adhesive system. After they were finished, polished and thermo cycled by 1000 cycles, in water at temperature of 5 degrees C and 55 degrees C, 30 seconds in each bath. For microleakage test each group of roots was immersed in recipients with Rodhamine B dye solution buffered at 2%, during 24 hours. After this time, the samples were washed in tap water, sectioned and evaluation of dye leakage. The values of infiltration were obtained by the qualitative method (scoring) and statistical analysis using Kruskal-Wallis test and also by the quantitative method (Image Tool) and statistical analysis using ANOVA one way. For both tests, no significant difference between the techniques of placement of the self-adhesive cement. Based on these findings, micro-infiltration was present in all groups, and the placement technique did not influence the degree of micro-leakage, both for the qualitative analysis as to the quantitative.


Assuntos
Infiltração Dentária , Cimentos de Resina , Animais , Bovinos , Infiltração Dentária/epidemiologia
19.
Gen Dent ; 59(4): e149-52, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21903553

RESUMO

The objective of this study was to evaluate the effects of maintenance therapy with or without the use of 0.12% chlorhexidine in the periodontal tissues of patients with diabetes mellitus who had carious lesions restored with composed resin. Twenty patients were selected, all of whom had diabetes mellitus in addition to carious cervical lesions in previously treated teeth. After 90 days, improvement in plaque and gingival indices and probing depth were noticed among patients in the group that received 0.12% chlorhexidine.


Assuntos
Anti-Infecciosos Locais/uso terapêutico , Clorexidina/uso terapêutico , Resinas Compostas/química , Materiais Dentários/química , Restauração Dentária Permanente/métodos , Complicações do Diabetes , Doenças Periodontais/prevenção & controle , Adolescente , Adulto , Idoso , Cárie Dentária/terapia , Placa Dentária/prevenção & controle , Índice de Placa Dentária , Polimento Dentário , Humanos , Pessoa de Meia-Idade , Índice Periodontal , Bolsa Periodontal/classificação , Bolsa Periodontal/prevenção & controle , Colo do Dente/patologia , Adulto Jovem
20.
Odontol. clín.-cient ; 10(3): 265-269, Jul.-Set. 2011. ilus, tab
Artigo em Português | LILACS-Express | ID: lil-725280

RESUMO

Este trabalho avaliou a sorção e a solubilidade de uma resina composta nanoparticulada em três meios líquidos diferentes: água destilada, Coca-Cola® e etanol/água a 75%, em função de dois períodos de armazenamentos: 7 e 15 dias. Foram confeccionados 30 espécimes, acondicionados em sílica gel azul, desidratada a 37°C, por 24 horas. Em seguida, foram pesados em balança analítica de precisão, repetindo-se até que se obtivesse massa constante (m1). Com a obtenção da m1, os espécimes foram subdivididos em 6 grupos e armazenados na solução. Três grupos permaneceram por 7 dias, e os outros três, por 15 dias. Após o período de armazenamento, os espécimes foram removidos, lavados, secos, pesados para a obtenção de uma segunda medida de massa, denominada m2. Os espécimes foram, então, recondicionados em estufa a 37°C. Mensurações de massa foram realizadas durante a desidratação, a cada 24 horas, obtendo-se a m3. Os dados de sorção e solubilidade foram calculados e submetidos à análise estatística. A resina nanoparticulada mostrou-se resistente à degradação química em meio ácido e em meio aquoso, mas foi suscetível à degradação, quando imerso em solução de etanol/água a 75%, apresentando solubilidade, sem diferença estatística entre os períodos de armazenamento.


This study evaluated the sorption and solubility of resin composite nanoparticle in three different liquid : distilled water, Coca-Cola ® and ethanol / water at 75%, according two periods of stores: 7 and 15 days. We prepared 30 specimens, packed in plastic container containing silica gel blue dehydrated and taken to an incubator at 37 ° C for 24 hours. Following, we weighed in analytical balance, and repeated until achieving constant mass (m1) on every 24 hour period. By getting the m1, the specimens were been divided into six groups and stored separately in 5 mL of each solution. Three groups were been maintained for 7 days and the other three for 15 days. After the storage period, the specimens were removed, washed, dried, weighed to obtain a second measure of mass, called m2. The specimens was reconditioned at 37 ° C. Mass measurements were performed during dehydration, every 24 hours, getting the dough reconditioned, with constant value of mass, called m3. The Data from sorption and solubility, we calculated and subjected to statistical analysis. The composite resin Filtek Z350 was found to be resistant to chemical degradation in acid and aqueous, but was susceptible to degradation when immersed in a solution of ethanol / water at 75%, with solubility, no statistical difference between the periods of storage.

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