RESUMO
Abstract To investigate the effect of the dimethyl sulfoxide combined with cross-linking agents on microtensile bond strength, silver nitrate penetration and in situ degree of conversion analysis of adhesives to the erosive dentin treatment with Cola-based soft drink. One hundred and sixty-six molars were assigned to 20 groups: (1) Treatment: Sound dentin; Erosive dentin; Erosive dentin treated with primer of dimethyl sulfoxide; Erosive dentin treated with DMSO primer containing proanthocyanidin and rivoflavin; (2) Adhesive systems: iBond Universal and Scotchbond Universal; and (3) adhesive strategy: etch-and-rinse or self-etch strategy. After restoration, specimens were sectioned into sticks to be tested. The data from microtensile bond strength (MPa), silver nitrate penetration (%) and in situ degree of conversion (%) were analyzed by (three- and two-factor ANOVA; Tukey's test α=5%). The application of dimethyl sulfoxide combined of not with cross-linkers improved all properties evaluated when compared to only erosive dentin treatment with Cola-based soft drink. However, only when dimethyl sulfoxide was combined to cross-linkers, the values of the microtensile bond strength, silver nitrate penetration and in situ degree of conversion in erosive dentin treatment with Cola-based soft drink was similar to sound dentin, for both adhesives and adhesive strategies. The application of dimethyl sulfoxide combined with the collagen cross-linking agent contributed to increasing the bond strength and degree of conversion in erosive lesion dentin, at the same time that significantly reduction of nanoleakage in this substrate.
Resumo Este estudo investigou o efeito do dimetil sulfóxido combinado a agentes de reticulação de colágeno na resistência de união à microtração, infiltração de nitrato de prata e análise do grau de conversão por Micro-Raman de sistemas adesivos universais para a dentina erosionada por refrigerante a base de Cola. Cento e sessenta molares foram divididos em 20 grupos: (1) Tratamento: Dentina sadia; Dentina erosionada; Dentina erosionada tratada com primer de dimetil sulfóxido; Dentina erosionada tratada com primer contendo 6,5% de proantocianidina e; Dentina erosionada tratada com primer contendo 0,1% de rivoflavina; (2) Sistemas adesivos: iBond Universal e Scotchbond Universal; e (3) estratégia adesiva: estratégia condicionamento e lavagem ou autocondicionate. Após a restauração, os espécimes foram seccionados em palitos e testados. Os dados dos três testes foram analisados estatisticamente (ANOVA de 2 e 3 fatores e teste de Tukey; α = 5%). A aplicação de dimetil sulfóxido combinado ou não agentes de reticulação de colágeno melhorou todas as propriedades avaliadas quando comparado a dentina erosionada. Entretanto, apenas quando o dimetil sulfóxido foi combinado com agentes de reticulação de colágeno, os valores de adesão a dentina, infiltração de nitrato de prata e grau de conversão em dentina erosionada foi semelhante a dentina sadia, para os dois adesivos e estratégias adesivas. A aplicação de dimetil sulfóxido combinado com agentes de reticulação de colágeno contribuiu para aumentar a resistência de união e o grau de conversão dentro da camada híbrida na dentina erodida, ao mesmo tempo que reduziu significativamente a nanoinfiltração neste substrato.
RESUMO
To investigate the effect of the dimethyl sulfoxide combined with cross-linking agents on microtensile bond strength, silver nitrate penetration and in situ degree of conversion analysis of adhesives to the erosive dentin treatment with Cola-based soft drink. One hundred and sixty-six molars were assigned to 20 groups: (1) Treatment: Sound dentin; Erosive dentin; Erosive dentin treated with primer of dimethyl sulfoxide; Erosive dentin treated with DMSO primer containing proanthocyanidin and rivoflavin; (2) Adhesive systems: iBond Universal and Scotchbond Universal; and (3) adhesive strategy: etch-and-rinse or self-etch strategy. After restoration, specimens were sectioned into sticks to be tested. The data from microtensile bond strength (MPa), silver nitrate penetration (%) and in situ degree of conversion (%) were analyzed by (three- and two-factor ANOVA; Tukey's test α=5%). The application of dimethyl sulfoxide combined of not with cross-linkers improved all properties evaluated when compared to only erosive dentin treatment with Cola-based soft drink. However, only when dimethyl sulfoxide was combined to cross-linkers, the values of the microtensile bond strength, silver nitrate penetration and in situ degree of conversion in erosive dentin treatment with Cola-based soft drink was similar to sound dentin, for both adhesives and adhesive strategies. The application of dimethyl sulfoxide combined with the collagen cross-linking agent contributed to increasing the bond strength and degree of conversion in erosive lesion dentin, at the same time that significantly reduction of nanoleakage in this substrate.
Assuntos
Colagem Dentária , Adesivos Dentinários , Colágeno , Cimentos Dentários , Dentina , Dimetil Sulfóxido , Teste de Materiais , Cimentos de Resina , Resistência à TraçãoRESUMO
O objetivo deste estudo clínico foi avaliar, por 7 semanas, a eficácia de dentifrícios clareadores e a satisfação dos pacientes após o uso. Foram selecionados 30 pacientes que possuíssem todos os dentes anteriores nas arcadas superior e inferior, apresentando cor inicial A2, avaliados através da escala de cores Vita Classical (Vita Zahnfabrik, Bad Säckingen, Alemanha). Os participantes foram aleatoriamente divididos em 3 grupos (n=10): GA - Colgate® Máxima Proteção Anticáries (controle negativo), GB - Colgate® Luminous White e GC - Colgate® Luminous White Advanced. Os dentifrícios foram distribuídos em bisnagas idênticas e aleatorizados. As avaliações de cor foram realizadas inicialmente ao uso (baseline), após 7, 15, 30 e 60 dias, utilizando dois métodos: avaliação subjetiva com as escalas de cor Vita Classical (Vita Zahnfabrik, Bad Säckingen, Alemanha) e Vita Bleachedguide 3D-MASTER (Vita Zahnfabrik, Bad Säckingen, Alemanha), e avaliação objetiva através do espectrofotômetro VITA Easyshade Compact®, Vident, Brea, CA, USA). Foi considerada a satisfação do paciente quanto a mudança de cor dos dentes. Os dados foram submetidos à análise estatística, utilizando análise de variância (ANOVA) de três critérios e pós-teste de Tukey (α=0.05). Os resultados demonstraram que houve diferença de cor estatisticamente significante nos grupos em que se utilizou os dentifrícios clareadores (GB e GC), nos períodos entre 15 e 30 dias. Conclui-se que ambos os dentifrícios GB e GC apresentaram ação clareadora, observado através das escalas subjetiva e objetiva. Porém, na percepção do paciente apenas no grupo GC houve mudança de cor. (AU).
The objective of this clinical study was to evaluate, for 7 weeks, the efficacy of whitening dentifrices and the patients' satisfaction after use. 30 patients were selected who had all the anterior teeth in the upper and lower arches, presenting an initial color A2, evaluated through the Vita Classical color scale (Vita Zahnfabrik, Bad Säckingen, Germany). The participants were randomly divided into 3 groups (n = 10): GA - Colgate® Maximum Antibody Protection (Negative Control), GB - Colgate® Luminous White and GC - Colgate® Luminous White Advanced. The dentifrices were distributed in identical and randomized tubes. The color evaluations were performed at baseline after 7, 15, 30 and 60 days using two methods: subjective evaluation with the Vita Classical (Vita Zahnfabrik, Bad Säckingen, Germany) and Vita Bleachedguide 3D- MASTER (Vita Zahnfabrik, Bad Säckingen, Germany), and objective evaluation using VITA Easyshade Compact® spectrophotometer, Vident, Brea, CA, USA). The patient's satisfaction with the teeth color change was considered. The data were submitted to statistical analysis using ANOVA of three criteria and Tukey post-test (α = 0.05). The results showed that there was a statistically significant difference in color in the groups in which the whitening dentifrices were used (GB and GC), in periods between 15 and 30 days. It was concluded that both GB and CG dentifrices presented a whitening action, observed through the subjective and objective scales. However, in the perception of the patient only in the CG group there was a change of color. (AU).
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OBJECTIVES: To answer the following PICO question (participant, intervention, comparator and outcome): Does flowable resin composite restorations compared with regular resin composites improve the marginal adaptation, marginal discoloration and retention rates of restorations placed in non-carious cervical lesions [NCCLs] of adults?, through a systematic review and meta-analysis. SOURCE: MEDLINE, Scopus, Web of Science, LILACS, BBO, Cochrane Library and SIGLE were searched without restrictions, as well as the abstracts of the IADR, clinical trials registries, dissertations and theses in May 2016 (updated in April 2017). STUDY SELECTION: We included randomized clinical trials (RCTs) that answered the PICO question. RCTs were excluded if cavities other than NCCLs were treated; indirect restorations; polyacid-based resins instead of composite resins were employed, restorations in primary teeth and restorations were placed in carious cervical lesions. The risk of bias tool of the Cochrane Collaboration was applied in the eligible studies and the GRADE tool was used to assess the quality of the evidence. DATA: After duplicates removal, 5137 articles were identified. After abstract and title screening, 8 studies remained. Six were at "unclear" risk of bias. The study follow-ups ranged from 1 to 3 years. No significant difference was observed between groups for loss of retention and marginal discoloration in all follow-ups. Better marginal adaptation was observed for restorations performed with flowable composites. At 1-year (risk ratio=0.27 [0.10 to 0.70]) and 3-year (risk ratio=0.34 [0.17 to 0.71]) follow-ups, flowable composites showed a risk 73% and 66% lower than regular composites for lack of adaptation, respectively. The evidence was graded as moderate quality for loss or retention at 3 years due to risk of bias and low and very low for all other outcomes due to risk of bias, imprecision and inconsistency. CONCLUSIONS: We have moderate confidence that the resin composite viscosity does not influence the retention rates at 3 years. Similar marginal discoloration and better marginal adaptation was observed for flowable composites but the quality of evidence is doubtful. (PROSPERO CRD42015019560).
Assuntos
Resinas Compostas/uso terapêutico , Cárie Dentária/terapia , Restauração Dentária Permanente , Colo do Dente/patologia , Adulto , Resinas Compostas/efeitos adversos , Resinas Compostas/química , Bases de Dados Factuais , Cárie Dentária/patologia , Adaptação Marginal Dentária , Retenção em Prótese Dentária , Falha de Restauração Dentária , Restauração Dentária Permanente/efeitos adversos , Restauração Dentária Permanente/métodos , Sensibilidade da Dentina , Feminino , Humanos , Masculino , Metanálise como Assunto , Ensaios Clínicos Controlados Aleatórios como Assunto , Guias de Estudo como Assunto , Descoloração de Dente , Dente Decíduo , ViscosidadeRESUMO
OBJECTIVES: To identify if selective etching of enamel (SEE) margins improves the retention rates and marginal discoloration of cervical composite restorations in non-carious cervical lesions (NCCLs) of adult patients. SOURCE: MEDLINE, Scopus, Web of Science, LILACS, BBO Library, Cochrane Library and SIGLE were searched without restrictions, as well as IADR abstracts and gray literature via trial registries. Dissertations and theses were searched using the ProQuest Dissertations and Periódicos Capes Theses databases. STUDY SELECTION: We included randomized clinical trials that compared the clinical effectiveness of SEE using the self-etch adhesive for direct composite resin restorations in NCCLs in the permanent dentition. DATA: After removal of duplicates, 2689 articles were identified. Following screening of abstracts, 10 studies remained in the qualitative synthesis. Seven were considered to be at "low" risk of bias. The report of the studies varied from 1 to 5 years. Except for one-year follow-up, there was a significantly lower marginal discoloration and marginal adaptation during all follow-up periods. Significantly less loss of retention of restorations at the 3-year follow-up was observed with the selective enamel etching technique. CONCLUSIONS: Selective enamel prior to application of self-etch adhesive systems in NCCLs might improve clinical performance of resin-composite cervical restorations, although further long-term research is required to confirm this. CLINICAL SIGNIFICANCE: Selective enamel etching prior to application of self-etch adhesive systems in NCCLs can produce composite restorations with higher longevity.
Assuntos
Esmalte Dentário , Resinas Compostas , Cimentos Dentários , Restauração Dentária Permanente , Adesivos Dentinários , Humanos , Colo do DenteRESUMO
INTRODUCTION: Luting posts inside the root canal is still a challenge because of the difficulty of bonding adhesive materials in the apical third of roots. This study evaluated the effect of the application mode of 3 simplified etch-and-rinse adhesives on the push-out bond strength (PBS), nanoleakage (NL), and in situ degree of conversion (DC) of fiber posts in the root canal. METHODS: The roots of human premolars were endodontically prepared and divided into 6 groups according to the combination of the main factors: adhesive (Ambar, FGM, Joinville, SC, Brazil; Adper Single Bond 2, 3MESPE, St Paul, MN; and XP Bond+self-cure activator, DeTrey Dentsply, Konstanz, Germany) and application mode (manual or sonic). The posts were cemented and the PBS tested at 0.5 mm/min. The NL was evaluated by scanning electron microscopy after the immersion of specimens in 50% silver nitrate. Micro-Raman spectroscopy was used to measure the in situ DC. Root third was also considered in the statistical evaluation. Data were analyzed by 3-way repeated measures analysis of variance and Tukey tests (5%). RESULTS: Under sonic application, the PBS and the in situ DC increased, whereas NL decreased significantly for all groups in the middle and apical thirds (P < .05). CONCLUSIONS: The application of simplified adhesives by sonic mode in the root canal is a feasible tool to increase the fiber post bond to root canals.
Assuntos
Colagem Dentária/métodos , Cavidade Pulpar/ultraestrutura , Adesivos Dentinários/química , Técnica para Retentor Intrarradicular/instrumentação , Cimentos de Resina/química , Sonicação/métodos , Bis-Fenol A-Glicidil Metacrilato/química , Cimentação/métodos , Cimentos Dentários/química , Infiltração Dentária/classificação , Análise do Estresse Dentário/instrumentação , Humanos , Teste de Materiais , Metacrilatos/química , Microscopia Eletrônica de Varredura , Polietilenoglicóis/química , Polimerização , Ácidos Polimetacrílicos/química , Distribuição Aleatória , Preparo de Canal Radicular/métodos , Coloração pela Prata/métodos , Análise Espectral Raman , Estresse Mecânico , Ápice Dentário/ultraestrutura , Dente não Vital/patologiaRESUMO
OBJECTIVES: To evaluate the effect of an additional hydrophobic resin coating (HE) on the resin-dentine microtensile bond strengths (µTBS), nanoleakage (NL), and in situ degree of conversion (DC) of three universal adhesives used in the etch-and-rinse (ER) and the self-etch (SE) modes. METHODS: Sixty caries-free extracted third molars were divided into 12 groups according to the combination of the factors adhesive (All-Bond Universal [ABU]; G-Bond Plus [GBP] and Scotchbond Universal [SBU]), adhesive strategy (ER and SE), and the use of HE (Heliobond; yes or no). After restorations were constructed, specimens were stored in water (37°C/24h) and sectioned into resin-dentine beams (0.8mm(2)) to be tested under tension (0.5mm/min). Selected beams from each tooth were used for DC quantification and for NL evaluation. Data from each adhesive were analyzed with two-way ANOVA and Tukey's test (α=0.05). RESULTS: ABU and GBP resulted in higher µTBS in the ER mode. The use of HE increased the µTBS of ABU and GBP only in the SE mode. Lower NL was observed for SBU and ABU in the ER mode+HE, and for GBP in the SE mode+HE. SBU and GBP showed higher DC when used in the ER mode, which was increased with HE application. The DC of ABU was similar in all conditions. CONCLUSIONS: The conversion of 1-step SE to 2-step SE may increase the µTBS and DC of current universal adhesives. The reduction in the NL is more dependent on the adhesive composition than on the bonding strategy.
Assuntos
Resinas Compostas/química , Colagem Dentária , Materiais Dentários/química , Dentina/ultraestrutura , Cimentos de Resina/química , Condicionamento Ácido do Dente/métodos , Acrilatos/química , Bis-Fenol A-Glicidil Metacrilato/química , Infiltração Dentária/classificação , Humanos , Interações Hidrofóbicas e Hidrofílicas , Teste de Materiais , Metacrilatos/química , Ácidos Fosfóricos/química , Polietilenoglicóis/química , Polimerização , Ácidos Polimetacrílicos/química , Distribuição Aleatória , Temperatura , Resistência à Tração , Fatores de Tempo , Água/químicaRESUMO
Objetivo: avaliar se o polimento pode minimizar ou resolver o manchamento ocasionado porcorantes de diferentes bebidas em resina composta. Material e Métodos: Confeccionou-se 40corpos-de-prova (CP)de resina composta microhíbrida Opallis (FGM), cor B1,em matriz plástica (5mm de diâmetro e 2 mm de espessura). A fotoativação foi realizada por 30s com LEDmetron I.Aseguir os CP's foram submetidos à avaliação inicial de cor em espectrofotômetro VITA EasyshadeCompact" obtendo-se valores correspondentes da escala CIEL*a*b*. Os CP foram divididos em 4grupos (n=10): água destilada (controle), café, Coca-Colaw e vinho tinto. Realizou-se avaliaçãoinicial da cor, após imersão por 60 dias para promover o manchamento e, após o procedimentode polimento com discos de feltro e pasta diamantada. Os dados foram analisados pela ANOVA2 fatores e pós-teste de Tukey (o=O,OS).Resultados: As médias ± desvio padrão de L* mostraramque a resina composta apresentou manchamento (p>O,OOl) após 60 dias de imersão em vinho(S7,96±7,98) e no café (61,89±3,S9) quando comparado a água destilada (73,49± 1,20) e a Coca--Cola" (70,SO±1,30). O polimento não conseguiu melhoria no manchamento (p
Objective: To assesswhether the polishing can minimize or solve the staining caused by dyes ofdifferent beverages in composite resins. Methods: 40 specimens were fabricated with composite resinmicrohybrid Opallis (FGM), B1 color in the plastic matrix (S mm in diameter and 2 mm thickl Thepolymerization was carried out with 30 seconds LEDmetron I.Then the specimens underwent initialevaluation of color spectrophotometer VITA Easyshade ® Compact obtaining corresponding valuesof the scale CIEL*a*b", The specimens were divided into four groups (n = 10): distilled water (controllcoffee, Coca-Colae and red wine. The specimens were again subjected to color evaluation initial,after the immersion for 60 days to promote the staining, and after the polishing procedure (felt discwith diamond paste). Data were analyzed by two-away ANOVA and Tukev's HSD test (0= O.OS).Results:mean ± standard deviation of L* showed that the composite showed staining (p¼ 0.001) after60 days of immersion in wine (S7.96 ± 7.98) and coffee (61.89 ± 3.S9) when compared to distilledwater (73.49 ± 1.20) and Coca-Cola ® (70.S0 ± 1.30).The polishing could not improve the staining (p<0.001) caused by wine and coffee. Conclusion: the polishing didn't minimize the stains caused bywine and coffee and such changes considered clinically detectable to the human eye.
Assuntos
Humanos , Masculino , Feminino , Polimento Dentário , Espectrofotometria/métodos , Resinas Compostas/uso terapêuticoRESUMO
A maior preocupação dos pacientes na Odontologia é a estética do sorriso. Nesse sentido, os fabricantes de materiais odontológicos têm aprimorado as resinas compostas, para que apresentem excelente estética e boas propriedades mecânicas. O objetivo do presente estudo é avaliar a influência de diferentes bebidas (vinho, coca-cola e café) na estabilidade de cor da resina composta com e sem escovação com dentifrício. Foram confeccionados corpos de prova com resina composta, os quais foram submetidos à avaliação inicial da cor e divididos em grupos que foram imersos por 30 e 60 dias, nos respectivos líquidos, referentes aos grupos experimentais. Após esse período de imersão, a cor foi novamente avaliada, e os corpos de prova, submetidos à escovação, para avaliar se a escovação é um método eficaz para prevenir ou diminuir o manchamento na resina composta, ocasionado pelas bebidas em estudo. As bebidas em estudo afetaram a estabilidade de cor das resinas compostas, apresentando alterações de cores visíveis. A escovação não foi eficaz na remoção da pigmentação pelo vinho tinto, porém propiciou melhoria no manchamento ocasionado pela coca-cola.
The main concern of patients in dentistry is the aesthetics of the smile. In this sense, the manufacturers of dental materials have improved, like the resins that are used for restorations in anterior and posterior teeth and that have excellent aesthetics and good mechanical properties. The aim of this study is to evaluate the influence of different drinks (wine, Coke and coffee) on color stability of composite resin with and without brushing with toothpaste. Specimens were fabricated with composite resin, which underwent an initial assessment of color and divided into groups that were immersed for 30 and 60 days in their net regarding the experimental groups. After this period of immersion, the color was measured again, and the specimens were submitted to brushing, to assess whether toothbrushing is an effective method to prevent or reduce the staining in composite resin, caused by drinking in study. Drinks in the study affected the color stability of composite resins, with color changes visible. Brushing was not effective in removing the pigment in red wine, however, resulted in improved staining caused by Coke.