Cam Karbomerlerin Polimerizasyonundaki Sıcaklık Değişimlerinin Termografik Ölçümü

Abstract

Bu in vitro çalışmanın amacı, cam karbomer (CK) ve rezin modifiye cam iyonomer simanların (RMCIS) LED ışık cihazıyla polimerizasyonu sırasında pulpa odası ve restorasyon yüzeyinde meydana gelen sıcaklık artışını ölçmektir. 20 adet çürüksüz ve daha önceden restore edilmemiş üçüncü büyük azı dişlere distal slot kavite açıldı. Grup 1 rezin modifiye cam iyonomer simanla (Fuji II LC, GC Corp, Leuven, Belçika), Grup 2 cam karbomerle (Glass Carbomer, GCP Dental, Vianen, Hollanda) restore edildi. Üretici firmaların talimatları doğrultusunda Grup 1 20 sn, Grup 2 80 sn 1,200 mW/cm2 gücünde LED ışık cihazıyla (VALO LED,Ultradent, South Jordan, ABD) polimerizasyonu sağlanmıştır. Yüksek çözünürlüklü infrared termal kamera (Testo 865, Testo Limited, Hampshire, İngiltere) ile anlık görüntüler alınmıştır. Son saniyedeki görüntü özel bir yazılımla (IRSoft v4.3, Testo SE, Lenzkirch, Almanya) değerlendirilmiştir. Infrared kamera ile oda sıcaklığı 26ºC olarak ölçülmüştür. Tüm bölgelerde, CK daha yüksek değerler göstermiştir. Restorasyon yüzeyinde CK 19,1±0,68°C sıcaklık artışı gösterirken RMCIS 13,53±1,96°C değerlerinde bir artış göstermiştir. Pulpa odasında ise CK 7,9±0,9°C, RMCIS 4,33±1,23°C sıcaklık artışı göstermişlerdir. Bu çalışmanın koşulları altında, cam karbomerin pulpa odasının sıcaklığını önemli derecede yükselttiği görülmüştür. Bu sıcaklık artışı sonucunda pulpada hasar meydana gelebilir.

Keywords

• Cam karbomer,cam iyonomer siman,infrared termal kamera,termografik ölçüm

Thermographic Measurement Of Temperature Rise Induced During Glass Carbomer Polymerization

Abstract

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.

Keywords

• Glass carbomer,glass ionomer cement,infrared thermal camera,thermographic measurement

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