The use of differential scanning calorimetry for the evaluation of dental materials

McCabe, J.F.; Wilson, H.J.

doi:10.1111/j.1365-2842.1980.tb00440.x

Cited by 39 publications

(7 citation statements)

References 13 publications

(10 reference statements)

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“…Thermal trauma may be induced by cavity preparation, exothermic polymerization reactions of resin-based restorative materials [2], and exothermic acid-base setting reactions of glass ionomer-based restorative materials [3] or from various light sources used for curing restorative materials [4, 5] and may eventually damage pulp tissue irreversibly if it is not controlled [6, 7]. …”

Section: Introductionmentioning

confidence: 99%

Intrapulpal Thermal Changes during Setting Reaction of Glass Carbomer® Using Thermocure Lamp

Kahvecioğlu

Tosun

Ülker

2016

BioMed Research International

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Objectives. To measure the temperature increase induced during thermocure lamp setting reaction of glass carbomer and to compare it with those induced by visible light curing of a resin-modified glass ionomer and a polyacid-modified composite resin in primary and permanent teeth. Materials and Methods. Nonretentive class I cavities were prepared in extracted primary and permanent molars. Glass carbomer (GC) was placed in the cavity and set at 60°C for 60 sn using a special thermocure lamp. Resin-modified glass ionomer (RMGIC) and polyacid-modified composite resin (PMCR) were placed in the cavities and polymerized with an LED curing unit. Temperature increases during setting reactions were measured with a J-type thermocouple wire connected to a data logger. Data were examined using two-way analysis of variance and Tukey's honestly significant difference tests. Results. The use of GC resulted in temperature changes of 5.17 ± 0.92°C and 5.32 ± 0.90°C in primary and permanent teeth, respectively (p > 0.05). Temperature increases were greatest in the GC group, differing significantly from those in the PMCR group (p < 0.05). Conclusion. Temperature increases during polymerization and setting reactions of the materials were below the critical value in all groups. No difference was observed between primary and permanent teeth, regardless of the material used.

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Section: Introductionmentioning

confidence: 99%

Intrapulpal Thermal Changes during Setting Reaction of Glass Carbomer® Using Thermocure Lamp

Kahvecioğlu

Tosun

Ülker

2016

BioMed Research International

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“…The Tg value of a tested material can be determined from a graphic representation of tan δ or E" 3,20,[24][25][26] . Differential scanning calorimetry is essentially a thermal analysis technique used to measure temperatures and heat flow related to the thermal transition of materials 24,27,28) . When using a differential scanning calorimeter, 2 pans are connected to the heater.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins

Takase

Watanabe

Kurogi

et al. 2015

Dental Materials Journal

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This study assessed methods for evaluation of glass transition temperature (Tg) of autopolymerized hard direct denture reline resins using dynamic mechanical analysis and differential scanning calorimetry in addition to the dynamic mechanical properties. The Tg values of 3 different reline resins were determined using a dynamic viscoelastometer and differential scanning calorimeter, and rheological parameters were also determined. Although all materials exhibited higher storage modulus and loss modulus values, and a lower loss tangent at 37˚C with a higher frequency, the frequency dependence was not large. Tg values obtained by dynamic mechanical analysis were higher than those by differential scanning calorimetry and higher frequency led to higher Tg, while more stable Tg values were also obtained by that method. These results suggest that dynamic mechanical analysis is more advantageous for characterization of autopolymerized hard direct denture reline resins than differential scanning calorimetry.

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“…Thermal trauma may be induced by cavity preparation or by the exothermic polymerization reaction of restorative materials 2) . It has been suggested that visible light activation units may also contribute to temperature rise within the pulp chamber and which may harm the pulp 3) .…”

Section: Introductionmentioning

confidence: 99%

Temperature Rise under Normal and Caries-Affected Primary Tooth Dentin Disks during Polymerization of Adhesives and Resin-containing Dental Materials

et al. 2008

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The purpose of this study was to compare the temperature rise under normal and caries-affected primary tooth dentin during photopolymerization of two adhesives and resin-containing restorative materials. Caries-affected and normal dentin disks were prepared from extracted primary molars with only mesial or distal approximal caries (4 mm in diameter, 1 mm in height). Temperature rise during photopolymerization of adhesive materials was measured with a J-type thermocouple wire that was connected to a data logger. Data were analyzed with two-way ANOVA and independent samples t-test. Temperature rise under caries-affected primary tooth dentin disks was higher than that of normal primary tooth dentin disks during polymerization of both adhesive systems and resin-containing dental materials (p<0.05). It was found that adhesive systems induced a higher temperature rise during polymerization as compared to the resin-containing restorative materials (p<0.05). In particular, temperature rise during polymerization of adhesive materials exceeded 5.5℃ under caries-affected primary tooth dentin.

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The use of differential scanning calorimetry for the evaluation of dental materials

Cited by 39 publications

References 13 publications

Intrapulpal Thermal Changes during Setting Reaction of Glass Carbomer® Using Thermocure Lamp

Intrapulpal Thermal Changes during Setting Reaction of Glass Carbomer® Using Thermocure Lamp

Evaluation of glass transition temperature and dynamic mechanical properties of autopolymerized hard direct denture reline resins

Temperature Rise under Normal and Caries-Affected Primary Tooth Dentin Disks during Polymerization of Adhesives and Resin-containing Dental Materials

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