The effect of post-cure heating on residual, unreacted monomer in a commercial resin composite

Bağiş, Yıldırım Hakan; Rueggeberg, Frederick A.

doi:10.1016/s0109-5641(00)00006-3

Cited by 99 publications

(83 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Post-cure heating at 75°C and above resulted in the lowest amount of residual monomers, without significant decrease with an increase in post-cure temperature. 26 Post-cure treatment at 100°C leads to a decrease in residual monomers remaining in the polymer (measured by FTIR), but the mechanical properties are not always improved for all composites. 3 In the present study, no statistical difference was found in flexural strength values, according to period of heating.…”

Section: Discussionmentioning

confidence: 99%

Heat treatment of a direct composite resin: influence on flexural strength

Miyazaki

Medeiros

Santana³

et al. 2009

Braz. oral res.

View full text Add to dashboard Cite

The purpose of this study was to evaluate the flexural strength of a direct composite, for indirect application, that received heat treatment, with or without investment. One indirect composite was used for comparison. For determination of the heat treatment temperature, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were performed, considering the initial weight loss temperature and glass transition temperature (T g ). Then, after photoactivation (600 mW/cm² -40 s), the specimens (10 × 2 × 2 mm) were heat-treated following these conditions: 170ºC for 5, 10 or 15 min, embedded or not embedded in investment. Flexural strength was assessed as a means to evaluate the influence of different heat treatment periods and investment embedding on mechanical properties. The data were analyzed by ANO-VA and Tukey's test (α = 0.05). TGA showed an initial weight loss temperature of 180ºC and DSC showed a T g value of 157°C. Heat treatment was conducted in an oven (Flli Manfredi, Italy), after 37°C storage for 48 h. Flexural strength was evaluated after 120 h at 37°C storage. The results showed that different periods and investment embedding presented similar statistical values. Nevertheless, the direct composite resin with treatments presented higher values (178.7 MPa) compared to the indirect composite resin (146.0 MPa) and the same direct composite submitted to photoactivation only (151.7 MPa). Within the limitations of this study, it could be concluded that the heat treatment increased the flexural strength of the direct composite studied, leading to higher mechanical strength compared to the indirect composite.

show abstract

Section: Discussionmentioning

confidence: 99%

Heat treatment of a direct composite resin: influence on flexural strength

Miyazaki

Medeiros

Santana³

et al. 2009

Braz. oral res.

View full text Add to dashboard Cite

show abstract

“…Therefore, many authors have proposed that the association of direct composites with simple thermal treatments may produce similar results when compared to the indirect technique, such as the improvement in material cure, thus enhancing clinical and mechanical properties (9)(10)(11)(12)(13)(14). An advantage would be the lower cost because the special ovens could be replaced by other heat sources, such as cast furnaces or auto-claves (13), which are commonly available in a prosthetic laboratory and dental offices.…”

Section: Introductionmentioning

confidence: 99%

Thermal behavior of direct resin composites: glass transition temperature and initial degradation analyses

Santana¹,

Gonçalves²,

Ribeiro³

et al. 2011

Rev. odonto ciênc. (Online)

View full text Add to dashboard Cite

“…La disminución de las propiedades de algunas resinas en agua tiene correlación directa con la absorción [19] y solubilidad en agua de las matrices (degradación hidrolítica) [20], [21]. Sankarapandian et al [22] investigaron el proceso de absorción de agua, su dureza y módulo de elasticidad de varios sistemas resinosos a base Bisgma y análogos, a los cuales se les sustituyó un grupo fenílico del carbón central de la cadena por fluorine, encontrándose que este reducía la absorción de agua en un 10%; además, se reportó que los polímeros fluorinados eran más estables en contacto con el agua, aunque la dureza disminuía y modificaba de manera considerable el módulo de elasticidad de los composites.…”

Section: Discussionunclassified

Efectos sobre microdureza y grado de conversión de dos tipos de resinas sometidas a tratamientos de pospolimerización

Lapesqueur¹,

Surriaga²,

Masache³

et al. 2015

Rev. nac. odontol.

View full text Add to dashboard Cite

Objetivo:evaluar la microdureza y el grado de conversión después de diferentes técnicas poscurado en dos tipos de resinas compuestas. Materiales y métodos: se realizaron 36 cuerpos de prueba con 12 mm de diámetro y 4 mm de altura, con dos resinas: Filtek z350 y Ena Miscerium. Después de la confec-ción, los cuerpos de prueba se llevaron al microduremetro y a espectroscopia de infrarrojo, y fueron sometidos a cuatro procesos de pospolimerización: agua en ebullición, microonda, calor seco, autoclave y horno gradia. Resultados: se hizo análisis estadístico por medio de Anova de dos factores con postest Tukey por resina evaluada, se presentan media y desviación estándar, los valores de grado de conversión muestran un gran aumento en la resina Ena comparado con el grupo control (63,81%), cuando es realizado pospolimerización con calor seco (89,02%) y una gran disminución cuando es realizado con agua en ebullición (36,41%). Con-clusiones: el proceso de curado posterior por microondas y autoclave aumenta los valores de microdureza y grado de conversión, y el agua destilada a temperaturas altas disminuye la microdureza de la superficie de las resinas compuestas

show abstract

The effect of post-cure heating on residual, unreacted monomer in a commercial resin composite

Cited by 99 publications

References 17 publications

Heat treatment of a direct composite resin: influence on flexural strength

Heat treatment of a direct composite resin: influence on flexural strength

Thermal behavior of direct resin composites: glass transition temperature and initial degradation analyses

Efectos sobre microdureza y grado de conversión de dos tipos de resinas sometidas a tratamientos de pospolimerización

Contact Info

Product

Resources

About