Özet:

The purpose of this in vitro study was to measure the pulp chamber and restoration surface temperature increase induced during glass carbomer (CK) and resin modified glass ionomer cement (RMCIS)polymerization with a LED-light-curing-unit. Twenty caries and restoration-free human third molars were prepared with distal slot preparations and were filled either with a resin modified glass ionomer cement (Fuji II LC, GC Corp, Leuven, Belgium)(Group 1); a glass carbomer cement ( Glass Carbomer, (GCP Dental, Vianen, The Netherlands))(Group 2). Group 1 were cured with a LED-light-cure (VALO LED,Ultradent, South Jordan, USA) with an intensity of 1,200 mW/cm2 for 20 seconds. But Group 2 cured for 80 seconds according to the manufacturer’s directions using same curing unit. In the last seconds of polymerization, photos of evaluation were taken with an high-resolution infrared camera (Testo 865, Testo Limited, Hampshire, UK). Photos analyzed with software (IRSoft v4.3, Testo SE, Lenzkirch, Germany) and the values of the room, restoration surface and pulp chamber temperature were recorded. Room temperature was recorded 26°C with infrared camera during study. In both regions, CK showed statistically significantly higher temperature increase than RMCIS. (p<0.05) On the restoration surfaces, CK was 19,1°C±0,68°C and RMCIS was 13,53°C±1,96°C. The effect of CK and RMCIS polymeriaztion on pulpal chamber temprature increase were 7,9°C±0,9°C and 4,33°C±1,23°C respectively. The range of temperature rise measured in this study (mean 7,9°C±0,9°C) would suggest that the pulp may be endangered by the temperature rise which occurs during glass carbomer polymerization in vivo.

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