Abstract
This study aimed to evaluate the temperature changes that occurred in the pulp chamber when using GCP Glass Carbomer Fill (GCP) and two different resin-modified glass-ionomer (RGI) restorative materials at different dentin thicknesses. A standardized Class I occlusal cavity with 1 mm or 2 mm dentin thickness was prepared in the extracted human molar teeth. RGI and GCP fills were placed in the cavities and cured with two different light-curing units. This study included a total of 120 samples, with 20 samples in each group. The pulp microcirculation method was used for measuring the intrapulpal temperature changes. Statistical analysis was performed using the two-way ANOVA and Tukey HSD multiple comparison tests. Statistically significant differences were observed between 1 mm and 2 mm dentin thicknesses (p < 0.001). The GCP groups (both 1 mm and 2 mm dentin thicknesses) exhibited higher temperatures than the other groups (p < 0.001), and Fuji II LC and Photac Fil Quick Aplicap showed similar values (p > 0.05). The highest temperature changes were observed with 1 mm dentin thickness. While RGI materials in both dentin thicknesses did not cause temperature changes that were harmful to the pulp, GCP CarboLED LCU caused the highest intrapulpal temperature rise, and these values were borderline harmful to the dental pulp.
Highlights
Dental pulp forms the core of the tooth and consists of living connective tissues that have a vulnerable and highly vascularized structure
This study aimed to evaluate the temperature changes that occurred in the pulp chamber when GCP was set using a light-curing source (GCP CarboLED thermo-cure lamp), and compare these temperature changes with those that occur with two different resin-modified glass-ionomer restorative materials and different dentin thicknesses
High temperatures were recorded in the pulp chamber when GCP was used on teeth with both 1 mm and 2 mm dentin thicknesses (p < 0.001)
Summary
Dental pulp forms the core of the tooth and consists of living connective tissues that have a vulnerable and highly vascularized structure. One topic that is of particular concern is the heat that is generated during restorative operations. Intrapulpal temperature can be very affected by basic dental procedures, such as tooth preparation, exothermic setting, and other techniques used during restoration.[1,2] anticipating and managing changes in this temperature can be quite complex as the extent of temperature variation is affected by several factors, including the type of light-curing unit (LCU) used, power density, exposure duration, distance between pulp and restorative materials, etc.[3,4,5] the heat produced by different dental procedures and/or materials used is undoubtedly one of the biggest sources of stress that can affect the vitality of
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