In vitro characterization of a novel resin-based restorative material containing alkaline fillers

Abstract Objective: In this study, a comparative evaluation of the physicochemical properties of Cention N and other direct restorative materials was performed. Three restorative materials—a resin-modified glass ionomer (Fuji II LC), an alkasite-based resinous material (Cention N), and a resin composite (Tetric N Ceram)—were characterized in terms of degree of conversion, Knoop hardness number (KHN) ratio, flexural strength, elastic modulus, water sorption, water solubility, microshear bond strength to dentin, immediate microleakage, and radiopacity. Methodology: The microshear bond strength to dentin and microleakage of Cention N were evaluated with and without the application of an adhesive system (Tetric N Bond Universal). A one-way ANOVA test was used to analyze the data in terms of degree of conversion, KHN ratio, water sorption, water solubility, microshear bond strength to dentin, and radiopacity. A two-way ANOVA test (carried out considering the material type and ethanol aging as factors) was used to analyze the data in terms of flexural strength and elastic modulus. The Kruskal-Wallis test was used to statistically analyze the data on microleakage. A significance level of α=0.05 was used for all tests. Results: Fuji II LC was found to have the highest degree of conversion, water sorption, and microleakage, as well as the lowest flexural strength. Cention N had the highest solubility; when used with an adhesive system, it achieved bond strength and microleakage similar to those of the Tetric N Ceram composite. Tetric N Ceram had the highest degree of conversion, KHN ratio, and radiopacity. Conclusion: The properties of Cention N validate its efficacy as an alternative direct restorative material when used in conjunction with an adhesive system.

Resistencia de unión al cizallamiento de diferentes agentes de fijación a aleaciones metálicas odontológicas / Shear bond strength of different bonding agents to dental metal alloys

Introducción: La fijación de las restauraciones indirectas es uno de los pasos más importantes, para conseguir una adecuada retención y sellado de la interfase entre el material restaurador y el diente. Objetivo: Evaluar la resistencia de unión al cizallamiento de diferentes agentes de fijación a dos aleaciones metálicas utilizadas en odontología. Métodos: Estudio experimental in vitro. Cien especímenes de aleaciones de metales base, 50 de níquel-cromo y 50 de níquel-cromo-titanio fueron preparados y divididos de manera aleatoria en 5 grupos. Esta división se realizó acorde con el agente de fijación utilizado: sistema autograbante de dos pasos (Clearfil SE Bond; CSB), sistema adhesivo universal (Single Bond Universal; SBU), cemento resinoso autoadhesivo (Maxcem Elite; ME), ionómero de vidrio (IV) y fosfato de zinc (ZnPO). Posteriormente a la aplicación de cada agente de fijación, los especímenes tratados fueron almacenados en agua destilada por 24 h a 37 ºC y sometidos a un ensayo de resistencia de unión al cizallamiento. Resultados: La resistencia de unión al cizallamiento fue influenciada significativamente por el tipo de agente de fijación (p = 0,002) y el tipo de aleación utilizada (p < 0,001). La resistencia de unión al cizallamiento fue mayor, al utilizar el sistema Clearfil SE Bond, seguida de Single Bond Universal; las diferencias entre Maxcem Elite y el Fosfato de zinc no fueron significativas. Finalmente, el IV no mostró adhesión a ninguna de las aleaciones metálicas utilizadas. Conclusiones: El uso de Clearfil SE Bond aumentó la resistencia de unión de los cementos resinosos a las aleaciones metálicas(AU)

Introduction: The bonding of indirect restorations is one of the most important steps, in order to achieve adequate retention and sealing of the interface between the restorative material and the tooth. Objective: To evaluate the shear bond strength of different bonding agents to two metal alloys used in dentistry. Methods: In vitro experimental study. One hundred specimens of base metal alloys, 50 nickel-chromium and 50 nickel-chromium-titanium were prepared and randomly divided into 5 groups. This division was made according to the bonding agent used: two-step self-etching system (Clearfil SE Bond; CSB), universal adhesive system (Single Bond Universal; SBU), self-adhesive resin cement (Maxcem Elite; ME), glass ionomer (IV) and zinc phosphate (ZnPO). After the application of each bonding agent, the treated specimens were stored in distilled water for 24 hr at 37 ºC and subjected to a shear bond strength test. Results: Shear bond strength was significantly influenced by the type of bonding agent (p = 0.002) and the type of alloy used (p < 0.001). Shear bond strength was highest when using the Clearfil SE Bond system, followed by Single Bond Universal; the differences between Maxcem Elite and Zinc Phosphate were not significant. Finally, IV did not show adhesion to any of the metal alloys used. Conclusions: The use of Clearfil SE Bond increased the bond strength of resinous cements to metallic alloys(AU)

Self-Report of the perception of stress and signs of bruxism generated during the pandemic in student of the health area / Autoinforme de la percepción de estrés y signos de bruxismo derivados de la pandemia en estudiantes del área de la salud

Abstract Bruxism is the repetitive muscle-mandibular behavior characterized by clenching and/or grinding of the teeth, which reflects the presence of one or more underlying conditions or factors. The objective of this descriptive study was to determine the association between bruxism and stress self-perceived during the pandemic, as well as their frequency by gender and academic area. An interrogation and self-perceived stress scale PSS-14 were applied to students from the different areas of the Institute of Health Sciences (ICSa) to determine the presence or absence of stress and bruxism symptom, a Chi-square was used for the comparison between variables, considering a value of p0.005. ICSa students between 18 and 24 age perceive symptoms of bruxism and high levels of stress caused during the pandemic.

Resumen El bruxismo es el comportamiento músculo-mandibular repetitivo caracterizado por apretamiento y/o rechinamiento de los dientes, que refleja la presencia de una o varias condiciones o factores subyacentes. Se realizó un estudio descriptivo con el objetivo de determinar la asociación del nivel de estrés y síntomas de bruxismo autopercibidos durante la pandemia, así como su frecuencia por género y área académica. Se aplicó un interrogatorio y escala de estrés percibido PSS-14 a los estudiantes de las distintas áreas del Instituto de Ciencias de la Salud (ICSa) para determinar la presencia o ausencia de estrés y síntomas de bruxismo, se utilizó una Chi-cuadrada para la comparación entre variables, considerando significativo un valor de p0.0001. Los estudiantes de 18 a 24 años de edad del ICSa perciben síntomas de bruxismo y altos niveles de estrés originados durante la pandemia.

Propiedades flexurales y estabilidad de color de materiales restauradores estéticos indirectos / Flexural properties and color stability of indirect esthetic restorative materials

Introducción: Las diferencias en las propiedades mecánicas de los materiales cerámicos y a base de resina plantean la interrogante sobre cuál puede tener un mejor desempeño a largo plazo. Objetivos: Evaluar la resistencia flexural y estabilidad de color de diferentes materiales restauradores estéticos indirectos. Métodos: Los materiales seleccionados fueron Filtek™ Z250 XT (3M ESPE), Ceramage (SHOFU Dental), VITA VM® LC y VITA ENAMIC® (VITA Zahnfabrik), IPS e.max® (Ivoclar-Vivadent) y Zolid FX (Amann Girrbach AG). El ensayo de resistencia flexural (n = 10) fue realizado en una máquina universal de ensayos mecánicos. Las lecturas de color (n = 5) se midieron en un espectrofotómetro VITA Easyshade V®. Resultados: Los materiales totalmente cerámicos mostraron un mejor desempeño mecánico (p < 0,001). Los resultados de estabilidad de color muestran que Ceramage, IPS e.max® y Zolid FX, mostraron una diferencia estadísticamente significativa (p ≤ 0,002) con Filtek Z250 XT, VITA VM® LC y VITA ENAMIC®. Conclusiones: Los materiales totalmente cerámicos presentaron una mayor resistencia flexural y estabilidad de color que los materiales de base polimérica. A pesar de ello, los materiales estéticos indirectos con polímeros en su composición, como Ceramage, se presentan como una alternativa válida, ya que además de tener propiedades mecánicas adecuadas, poseen una estabilidad de color semejante a los materiales cerámicos(AU)

Introduction: Differences in the mechanical properties of ceramic and resin-based materials pose the question of which of the two will perform better in the long run. Objectives: Evaluate the flexural resistance and color stability of different indirect esthetic restorative materials. Methods: The materials selected were Filtek™ Z250 XT (3M ESPE), Ceramage (SHOFU Dental), VITA VM® LC and VITA ENAMIC® (VITA Zahnfabrik), IPS e.max® (Ivoclar-Vivadent) and Zolid FX (Amann Girrbach AG). The flexural resistance assay (n = 10) was conducted in a universal mechanical testing machine. Color readings (n = 5) were taken with a VITA Easyshade V® spectrophotometer. Results: All-ceramic materials had better mechanical performance (p < 0.001). Color stability results show that Ceramage, IPS e.max® and Zolid FX displayed a statistically significant difference (p ≤ 0.002) with respect to Filtek Z250 XT, VITA VM® LC and VITA ENAMIC®. Conclusions: All-ceramic materials exhibited greater flexural resistance and color stability than polymer-based materials. However, indirect esthetic materials with polymers in their composition, such as Ceramage, are presented as a valid alternative, due to their appropriate mechanical properties and their color stability, which is similar to that of ceramic materials(AU)

Evaluation of irradiance and radiant exposure on the polymerization and mechanical properties of a resin composite

Abstract The objective of the present study was to evaluate the effect of irradiance and radiant exposure on the chemical-mechanical properties of a resin composite. A micro-hybrid resin composite (Clearfil AP-X, Kuraray) was investigated under two different irradiances: low (300 mW/cm2) and high (800 mW/cm2) and radiant exposures: 8 and 16 J/cm2. Four groups, named Low 8 J/cm2, High 8 J/cm2, Low 16 J/cm2, and High 16 J/cm2 were tested, and their flexural strengths, elastic moduli, depths of cure, and degrees of conversion were evaluated. Data were analyzed using two-way ANOVA and Tukey's test. A multiple linear regression model was used to correlate the irradiance and radiant exposure with dependent variables (α = 0.05). Irradiance and radiant exposure were found statistically significant for all dependent variables. The interaction between the factors was statistically significant only for the degree of conversion and elastic modulus. Group Low 16 J/cm2 exhibited a significantly superior performance in all the evaluated properties. Barring the degree of conversion, no significant differences were observed among the properties evaluated between the Low 8 J/cm2 and High 8 J/cm2 groups. The adjusted R2 values were high for the depth of cure and degree of conversion (0.58 and 0.96, respectively). Both irradiance and radiant exposure parameters play an important role in establishing the final properties of a micro-hybrid resin composite. Irradiance has a greater influence under higher radiant exposures.

Effect of alpha-humulene incorporation on the properties of experimental light-cured periodontal dressings

Abstract The objective of this study was to formulate an experimental light-cured periodontal dressing containing alpha-humulene and to compare its physical, antimicrobial, and cytotoxicity properties with commercial gold standards (Barricaid® and Periobond®). Two periodontal dressing formulations were developed (a and b). The formulations were divided into 5 groups according to the alpha-humulene concentration as follows: Ea - control group, Ea1 - 1%, Ea5 - 5%, Ea10 - 10%, and Ea20 - 20%; Eb - control group, Eb1 - 1%, Eb5 - 5%, Eb10 - 10%, and Eb20 - 20%. Materials characterization was performed using the degree of conversion, cohesive strength, sorption, and solubility assays. Antimicrobial assay was performed using the modified direct contact test against E. faecalis and S. aureus. Cytotoxicity was assessed by the cell viability experiment using L929 fibroblasts. In general, the cohesive strength values of materials decreased as the alpha-humulene concentration increased. All the experimental dressings showed antimicrobial activity against both bacteria tested. Cell viability results for the Ea, Ea1, Eb, and Eb1 groups showed moderate cytotoxic effect. The formulations containing alpha-humulene showed similar behavior to the commercial references. Thus, formulations containing alpha-humulene have potential to be used as periodontal dressing.

Biological and mechanical characterization of commercial and experimental periodontal surgical dressings

Abstract The objective of this study was to evaluate the biocompatibility and mechanical properties of two commercially available and one experimental periodontal dressing materials. The cytotoxicity of Periobond ® , Barricaid ® and one experimental periodontal dressing based on Exothane ® 8 monomer was tested on 3T3/NIH mouse fibroblast. Genotoxicity was assessed by micronuclei formation, and cell alterations were analyzed using light microscopy. Both biological assays were performed using the eluate obtained from specimens after 24, 72, or 168 hours of incubation. Mechanical characterization was assessed through the ultimate tensile strength and the water sorption and solubility tests. The significance level of α = 0.05 was used for all statistical analyses. All the materials promoted a cell viability lower than 60% in all evaluated times. In general, the cell viability was significantly reduced after 72 and 168h of specimens' incubation. Considering the factor material, there were not statistical differences in the cell viability (p = 0.156). The genotoxicity was not statistically significant among the groups in the different periods of time (p > 0.05). Differences in the ultimate tensile strength values were not statistically significant different among the groups (p = 0.125). Periobond ® showed the higher water sorption values (p < 0.001). Regarding solubility, there were no statistical differences between the groups (p = 0.098). All the periodontal dressing materials evaluated in this study exerted a cytotoxic effect against mouse fibroblasts, and their toxicity became more evident over time. Among the materials evaluated, the experimental light-cure type has shown overall similar properties to the commercial references.

Evaluación de la resistencia de unión a dentina humana de un sistema adhesivo universal con clorhexidina utilizado en modo de grabado total y autocondicionante / Avaliação da resistência de união à dentina humana de um sistema adesivo universal com clorexidina utilizado no modo de condicionamento total e autocondicionante Romina Tessore1 / Human dentin bond strength of a chlorhexidine containing universal adhesive system used in total-etch and self-etch mode

Objetivos: Evaluar la resistencia de unión a la microtracción en dentina humana de un sistema adhesivo universal con clorhexidina en su composición, en modo de grabado y lavado en 2 pasos, y en modo de autograbado. Metodología: 20 terceros molares divididos aleatoriamente en 4 grupos según el tipo de sistema adhesivo utilizado (Single Bond Universal®, 3MESPE y Peak Universal Bond®, Ultradent Products) y modo de uso (grabado total y autograbado). Se confeccionaron cuerpos de prueba sometidos al ensayo de microtracción utilizando una máquina de ensayos universales. Resultados: No se encontraron diferencias estadísticamente significativas entre los cuatro grupos estudiados. Conclusiones: La resistencia de unión de una resina compuesta a dentina humana no fue afectada por el uso de un sistema adhesivo universal que contiene clorhexidina en su composición aplicado en los modos de grabado total y autograbado

Objectives: To evaluate the microtensile bond strength to human dentin of chlorhexidine containing universal adhesive system applied in the total-etch and selfetch modes. Methods: Twenty third molars were randomly divided into four groups according to the universal adhesive system (Single Bond Universal ®, 3M ESPE and Peak Universal Bond®, Ultradent) and application mode used (total-etch and self-etch). Specimens were prepared and subjected to a microtensile bond strength using a MTS SANS universal testing machine. Results: No statistically significant differences were found in the microtensile bond strength between the four groups studied. Conclusions: The bond strength of a composite resin to human dentin was not affected by the use of a universal adhesive system with chlorhexidine in its composition applied in the total-etch and self-etch modes.

Objetivos: Avaliar a resistência de união á microtração na dentina humana de um sistema adesivo universal com clorexidina na sua composição, no modo de condicionamento total em dois passos e no modo autocondicionante. Metodologia: 20 terceiros molares foram divididos aleatoriamente em 4 grupos, de acordo com o tipo de sistema adesivo utilizado (Single Bond Universal®, 3MESPE e Peak Universal Bond®, Ultradent Products) e modo de uso (condicionamento total e autocondicionante). Os corpos de prova criados foram submetidos ao teste de microtração utilizando uma máquina de ensaios universal. Resultados: Não foram encontradas diferenças estatisticamente significativas entre os quatro grupos estudados. Conclusões: A resistência de união da resina composta à dentina humana não foi afetada pelo uso de um sistema adesivo universal contendo clorexidina em sua composição, aplicado nos modos de condicionamento total ou autocondicionamento.

Estudio in vitro de la relación entre resistencia de unión a esmalte dental y microfiltración en resinas compuestas fotopolimerizables / In vitro study of the relationship between bond strength to dental enamel and microleakage in photopolymerizable composite resins

Objetivos. Evaluar y comparar la relación entre la resistencia de unión inmediata a esmalte y microfiltración de dos sistemas restauradores a base de resina compuesta. Métodos. 40 terceros molares se dividieron aleatoriamente en dos grupos: 20 molares restaurados utilizando el sistema Adper Single bond 2 + Filtek Z250 XT (3M ESPE; ST PAUL, MN, USA); y 20 molares restaurados con el sistema Tetric N Bond + Tetric N Ceram (Ivoclar Vivadent; Schaan, Liechtenstein). La mitad de los dientes de cada grupo se utilizaron para un ensayo de microtracción, mientras que la otra mitad fueron utilizados para un ensayo de microfiltración (n = 10). Resultados. Las medias y el desvío padrón de la resistencia de unión a microtracción fueron de 27.93 (±9.55) para Adper Single bond 2 + Filtek Z250 XT MPa y 33.12 (±8.18) MPa para Tetric N Bond + Tetric N Ceram (p = 0,049). En cuanto a los valores de microfiltración, no hubo diferencias estadísticamente significativas entre los grupos (p = 0,478). No fue observada una correlación significativa entre la resistencia de unión a la microtracción y la microfiltración (R2 = 0.0909; p = 0.196). Conclusiones. No se encontró una relación entre los valores de resistencia de unión y el grado de microfiltración.

Objectives. To evaluate and compare the relationship between enamel bond strength and microleakage of two composite based restorative systems. Methods. 40 third molars were randomly divided into two groups: 20 molars restored with the Adper Single bond 2 + Filtek Z250 XT (3M ESPE; ST PAUL, MN, USA) system and 20 with the Tetric N Bond + Tetric N Ceram (Ivoclar Vivadent; Schaan, Liechtenstein) system. "Half of the teeth" in each group were subjected to a bond strength test, while the others were subjected to the microleakage test. Results. The means and standard deviation of the bond strength resistance were 27.93 (± 9.55) MPa for Adper Single bond 2 + Filtek Z250 XT system and 33.12 (± 8.18) MPa for Tetric N Bond + Tetric N Ceram system (p = 0.049). Regarding microleakage values, there were no statistically significant differences between the groups (p = 0.478). No significant correlation was observed between microtensile bond strength and microleakage (R2 = 0.0909, p = 0.196). Conclusions. No relationship was found between adhesive bond values and degree of microleakage.

Objetivos. Avaliar e comparar a relação entre a resistência de união imediata ao esmalte e a microfiltração de dois sistemas restauradores baseados em resina composta. Métodos. 40 terceiros molares foram divididos aleatoriamente em dois grupos: 20 molares restaurados usando o sistema Adper Single bond 2 + Filtek Z250 XT (3M ESPE; ST PAUL, MN, EUA); e 20 molares restaurados com o sistema Tetric N Bond + Tetric N Ceram (Ivoclar Vivadent; Schaan, Liechtenstein). Metade dos dentes de cada grupo foi utilizada para um teste de resistência de união à microtração, enquanto a outra metade foi utilizada para um teste de microfiltração (n = 10). Resultados. As mídias e o padrão de resistência de união à microtração foram 27,93 (± 9,55) para Adper Single bond 2 + Filtek Z250 XT MPa e 33,12 (± 8,18) MPa para Tetric N Bond + Tetric N Ceram (p = 0,049). Em relação aos valores de microfiltração, não houve diferença estatisticamente significativas entre os grupos (p = 0,478). Não houve correlação significativa observada entre a resistência de união à microtração e a microfiltração (R2 = 0,0909; p = 0,196). Conclusões. Não foi encontrada relação entre os valores de resistência de união e o grau de microfiltração.

Simple and low-cost thermal treatments on direct resin composites for indirect use

Abstract The aim of this study was to evaluate the influence of three low-cost additional thermal treatments, available in the dental office, on the mechanical, chemical and optical properties of a light-cured resin composite indicated for direct restorations but used as indirect restorative. The direct resin composite TPH3 (Dentsply) was light-polymerized using a light-emitting diode curing unit and submitted to three experimental additional thermal treatments: dry heat at 170 °C for 5 min, autoclave at 121 °C for 6 min, or microwave oven at 450 W for 3 min. The resin composite without any thermal treatment was used as negative control group. An indirect resin composite (Vita CM LC, Vita Zahnfabrik) was tested as a reference. Flexural strength, elastic modulus, microhardness, degree of C=C conversion, roughness before and after simulated toothbrush abrasion, translucency parameter and color difference (ΔE00) were evaluated. Data were analyzed at α=0.05. The indirect resin composite presented lower C=C conversion and mechanical performance. The flexural strength was significantly higher in the dry oven group compared with the control. The roughness was not different among groups before or after brushing, but the thermal treatments caused an increase in C=C conversion, microhardness, and elastic modulus without affecting the translucency parameter or showing visible color alteration (ΔE00<1.8). These results suggest that the use of additional thermal methods of polymerization represents an economical and simple alternative to enhance the mechanical and chemical properties of direct resin composites when used as indirect restoratives.

Resumo O objetivo deste estudo foi avaliar a influência de três tratamentos térmicos adicionais de baixo custo, disponíveis no consultório dentário, nas propriedades mecânicas, químicas e ópticas de uma resina composta fotoativada indicada para restaurações diretas porém usada como restaurador indireto. A resina composta direta TPH3 (Dentsply) foi fotoativada usando um diodo emissor de luz e submetida a três tratamentos térmicos adicionais experimentais: forno seco a 170 °C por 5 min, autoclave a 121 °C por 6 min ou forno de micro-ondas a 450 W por 3 min. A resina composta sem qualquer tratamento térmico adicional foi usada como grupo controle negativo. Uma resina composta indireta (Vita CM LC, Vita Zahnfabrik) foi testada como referência comercial. Resistência à flexão, módulo de elasticidade, microdureza, grau de conversão de C=C, rugosidade antes e após abrasão por escovação simulada, parâmetro de translucidez e diferença de cor (ΔE00) foram avaliados. Os dados foram analisados considerando α=0.05. A resina composta indireta apresentou menor conversão de C=C e desempenho mecânico. A resistência à flexão foi significativamente mais alta no grupo forno seco comparado ao controle. A rugosidade não foi diferente entre os grupos antes ou após a escovação, porém os tratamentos térmicos adicionais causaram aumento na conversão de C=C, microdureza e módulo de elasticidade, sem afetar o parâmetro de translucidez ou mostrar alteração de cor visível (ΔE00<1,8). Estes resultados sugerem que o uso de métodos térmicos adicionais de polimerização representam alternativa econômica e simples para aprimorar as propriedades mecânicas e químicas de resinas compostas diretas quando utilizadas como restauradores indiretos.

Effect of radiant exposure and UV accelerated aging on physico-chemical and mechanical properties of composite resins

Abstract Currently, there is no consensus in terms of defining the minimum radiant exposure values necessary for achieving adequate properties of composite resin. In addition, the long-term influence that radiant exposure has on the properties of composite resins is still questionable. Objective: The objective of this study was to evaluate the effect of radiant exposure and UV accelerated aging on the physico-chemical and mechanical properties of micro-hybrid and nanofilled composite resins. Material and Methods: A nanofilled (Filtek Supreme; 3M ESPE) and a micro-hybrid composite resin (Filtek Z250; 3M ESPE) were investigated under different radiant exposures (3.75, 9, and 24 J/cm2) and UV accelerated aging protocols (0, 500, 1000, and 1500 aging hours). The degree of conversion (DC), flexural strength (FS), modulus (M), water sorption (WS), and solubility (WL) were evaluated. The results obtained were analyzed using two-way ANOVA and Tukey's test. Comparisons were performed using a significance level of α=0.05. Results: The DC, FS, and M were found to be significantly influenced by both radiant exposure and accelerated aging time. The DC and EM increased with radiant exposure in the no-aging group (0-hour aging) for both micro-hybrid and nanofilled composites, whereas no correlation was found after accelerated aging protocols. WS and WL of micro-hybrid and nanofilled composite resins were scarcely affected by radiant exposure (p>0.05), whereas they were significantly reduced by accelerated aging (p<0.001). Conclusions: Although increasing radiant exposure affected the degree of conversion and mechanical properties of micro-hybrid and nanofilled composites, no influence on the hydrolytic degradation of the material was observed. In contrast, UV accelerated aging affected both the physico-chemical and mechanical properties of the composites.

A new method for evaluating the retentive efficacy of different denture adhesives

Aim: The aim of this study was to evaluate a new method for measuring the retention values of different denture adhesives. Methods: The adhesive strength values of three different commercial denture adhesives (Corega powder, Corega adhesive tape and Ultra Corega cream) were evaluated using three different moisturizing agents (distilled water, artificial saliva and natural saliva). The adhesive test was performed on a universal testing machine, after applying the adhesive products to acrylic resin specimens, under two different test conditions (wetting or dipping). Tensile bond strength values in MPa were obtained for each denture adhesive presentation and test condition. Viscosity of the denture adhesives mixed with the different moisturizing agents was determined using a rotary rheometer. Maximum viscosity values were analyzed using the one-way ANOVA test. Tensile bond strength data was analyzed using Kruskal-Wallis and the Tukey's test. Pooled data of each denture adhesive presentations for all test conditions was also carried out. Correlation between viscosity and pooled tensile strength values was analyzed through linear regression analysis. A significance level of α=0.05 was set for all analyses. Results: Results showed that statistically higher adhesion strength was obtained with tape and cream adhesives when using natural saliva as moisturizing agents (p<0.05). The adhesive strength values obtained with the dipping method were similar to those obtained with the conventional wetting method. The denture retention strength was influenced by both the denture adhesive type and moisturizing agent used. Conclusion: The dipping method showed to be a reliable test capable to simulate the oral conditions and should be better explored in further studies