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

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.

Estabilidad dimensional de hidrocoloides irreversibles de vaciado convencional y de vaciado de tiempo extendido disponibles en el mercado uruguayo

Objetivo. Comparar la estabilidad dimensional de un hidrocoloide irreversible de vaciado convencional con hidrocoloides irreversibles de vaciado extendido. Metodología. Fueron evaluados cuatro productos con indicación de vaciado extendido: Jeltrate Plus (Denstply Sirona), Hydrogum 5 (Zhermack SpA), Algimax (Major), Kromopan (Lascod) y un producto de vaciado convencional (Tropicalgin; Zhermack SpA). Con cada producto se realizaron 10 impresiones y se vaciaron en yeso tipo III en cinco tiempos de almacenamiento diferentes (0, 24, 96, 120 y 168 horas). Un escáner para modelos tridimensionales se utilizó para digitalizar los modelos de yeso y realizar las mediciones correspondientes: sumatoria de las longitudes, variabilidad dimensional, porcentaje de variabilidad. Resultados. Las cinco marcas comerciales presentaron una sumatoria de longitudes mayor al grupo control (p<0,033). A las 0, 24 y 96h Tropicalgin e Hydrogum 5 presentaron significativamente menor variación dimensional en comparación con el modelo maestro (p<0,001). Los porcentajes de variabilidad oscilaron entre un 0.24 a 0.91%. Conclusiones. La estabilidad dimensional depende del producto utilizado. Almacenado correctamente, el hidrocoloide irreversible de vaciado convencional parece no sufrir alteraciones significativas hasta 96h, mientras que en el caso de Hydrogum 5 parece mantener su estabilidad dimensional hasta 168h.

Objetivo. Comparar a estabilidade dimensional de um hidrocolóide irreversível de vazamento convencional com hidrocolóides irreversíveis de vazamento prolongado. Metodologia. Foram avaliados quatro produtos com indicação de vazamento estendido: Jeltrate Plus (Denstply Sirona), Hydrogum 5 (Zhermack SpA), Algimax (Major), Kromopan (Lascod) e um produto de vaziamento convencional (Tropicalgin; Zhermack SpA). Para cada produto foram feitas 10 impressões e vazadas em gesso tipo III em cinco tempos de armazenamento diferentes (0, 24, 96, 120 e 168 horas). Um scanner de modelos tridimensionais foi utilizado para digitalizar os modelos de gesso e fazer as medições correspondentes: soma dos comprimentos, variabilidade dimensional, percentagem de variabilidade. Resultados. As cinco marcas comerciais apresentaram somatório de comprimentos maior que o grupo controle (p<0,033). Nos tempos 0, 24 e 96h Tropicalgin e Hydrogum 5 apresentaram variação dimensional significativamente menor em comparação ao modelo Mestre (p<0,001). Os percentuais de variabilidade variaram de 0,24 a 0,91%. Conclusões. A estabilidade dimensional depende do produto utilizado. Armazenado corretamente, o hidrocolóide irreversível de vaziamento convencional convencionalmente parece não sofrer alterações significativas até 96h, enquanto no caso do Hydrogum 5 parece manter sua estabilidade dimensional até 168h.

Aim . Compare the dimensional stability of a conventional pouring irreversible hydrocolloid with extended pouring irreversible hydrocolloids. Methodology. Four products with extended emptying indication were evaluated: Jeltrate Plus (Denstply Sirona), Hydrogum 5 (Zhermack SpA), Algimax (Major), Kromopan (Lascod) and a conventional emptying product (Tropicalgin; Zhermack SpA). For each product, 10 impressions were made and cast in type III plaster at five different storage times (0, 24, 96, 120 and 168 hours). A three-dimensional model scanner was used to digitize the plaster models and make the corresponding measurements: sum of lengths, dimensional variability, percentage of variability. Results . The five commercial brands presented a greater sum of lengths than the control group (p<0,033). At 0, 24 and 96h Tropicalgin and Hydrogum 5 presented significantly less dimensional variation compared to the master model (p<0,001). The variability percentages ranged from 0.24 to 0.91%. Conclusions. Dimensional stability depends on the product used. Stored correctly, the conventionally cast irreversible hydrocolloid appears not to undergo significant alterations up to 96h, while in the case of Hydrogum 5 it appears to maintain its dimensional stability up to 168h.

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.