Temperature rises during tooth bleaching with different light-curing units


Ozyilmaz O. Y. , Yavuz T., SARI T., Aykent F., Ozturk A. N.

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, cilt.29, ss.1572-1580, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 29 Konu: 15
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/01694243.2015.1035490
  • Dergi Adı: JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
  • Sayfa Sayısı: ss.1572-1580

Özet

The aim of this study was to evaluate the influence of three different light-curing units on the temperature rise induced in the pulpal cavity, when bleached with 35% hydrogen peroxide (HP). Forty extracted maxillary central incisors were randomly divided into four groups according to photoactivation procedure (n=10). Whiteness HP (WHP) bleaching agent which contains 35% HP bleach was placed on the facial tooth surface and no photoactivation device was used (control); an blue light-emitting diode (LED, 40s), a diode laser (4W, Continous mode, 20s), and Nd:YAG laser (4W, 60Hz frequency, 20s). Temperature rise in the pulpal chamber was measured with a J-type thermocouple wire that was connected to a data logger before and immediately after each 20-40s application. One tooth of each group was selected for scanning electron microscope analysis. Data were analyzed using one-way ANOVA followed by the Games Howell post hoc test at a preset alpha of 0.05. One-way ANOVA revealed that there was a significant difference among the light-curing units (p<0.05) and between control group and light-curing units (p<0.05). The Nd:YAG induced significantly, which resulted in higher temperature increase than other light-curing units (10.7 degrees C). The LED unit produced the lowest temperature changes (3.2 degrees C) among the light-curing units. The presence of the bleaching gel did not cause a temperature increase in control group (0 degrees C). The results suggested that using light-curing units caused temperature changes in the intrapulpal cavity during tooth bleaching. The use of LED will be more safer for pulpal health when assisted with WHP bleaching gel.