An investigation of thermal changes of various permanent dental cements

Abstract

Theaimofthisstudywastoinvestigateandcomparethetemperatureriseswhichoccurredduringthesettingreactionsof different permanent cements used to lute fixed partial prosthodontics.In this study, four cements were used. They were mixed in three different proportions: according to manufacturers' recommendations, at doubled powder ratio, and at doubled liquid ratio. With a thermocouple, the temperature rises which occurred during the setting reactions were measured. For each proportion, the measurement was repeated five times such that a total of 60 measurements were done for the four different cements. Data were analyzed using analysis of variance (ANOVA).ANOVA results showed that cement type and the interaction between cement type and the powder-liquid ratio were statistically significant factors (p<0.001). Similarly, the powder-liquid ratio was a statistically significant (p<0.01) factor.Among the dental cements tested, zinc phosphate cement showed the highest temperature rise during setting reaction, whereas glass ionomer cement showed the lowest.

Mechanical and Bioactive Properties of a Commercial Glass Carbomer: GCP Glass Fill

“…Differences in mechanical and bioactive properties can thus only be ascribed 4 Avicenna J Dent Res. In Press(In Press):e14433.…”

“…GICs also benefit from their thermal compatibility with tooth tissue 2. Among most restorative and luting cements, GICs have the lowest increase in temperature while setting, which improves their biocompatibility, especially in cements that have to be placed in close contact to the pulp (4). Despite these benefits, their applications are limited due to their low mechanical properties, such as compressive strength, flexural strength, (diametral) tensile strength and brittleness.…”

Solubility of glass ionomer cement in various acidic beverages at different time intervals: an in vitrostudy

“…Various factors that cause SD of cements include composition of the cements, less powder-liquid ratio, the release of fluoride ions from certain cements, oral hygiene maintenance by the patient, composition of the dentifrice, pH of the foods/beverages taken by the patient, composition and pH of the saliva [9]. Numerous studies reported that the acidic pH increases SD to a greater extent [10][11][12]. Therefore, it is evident that the SD is more among the patients consuming more acidic beverages.…”

"Estudo da evolução da reação de presa do cimento de fosfato de zinco através de luz laser, aplicando a técnica óptica de speckle dinâmico"

“…SWARTZ, 1991;DUYMUS, 2004;PEARSON;ATKINSON, 1987;PHILLIPS, 1991;DORIN RUSE, 1986). Entretanto, não foi possível verificar um período tão longo através do método do laser speckle.…”

“…Os trabalhos e artigos da literatura, pesquisaram de forma indireta a evolução da reação de presa do cimento de fosfato de zinco, por meio da análise de características, tais como: variação do pH, variação de resistência à compressão e variação da contração linear (ATTAR; TAM; MCCOMB, 2003;BRYANT;WING, 1976;CIVJAN;BRAUER, 1964;SWARTZ, 1991;POWERS, 2004;DUYMUS, 2004;OILO, 1975;ISAACS, 1933;PEARSON;ATKINSON, 1987;PHILLIPS, 1991;SMITH, 1971;DORIN RUSE, 1986). Não há na literatura pesquisas que demonstrem de modo rigoroso a evolução da reação em função do tempo.…”