Effect of light‐activated bleaching on pulp chamber temperature rise: An in vitro study

Abstract

This study aimed to compare the pulp chamber temperature changes that occur with the use of different light sources during vital bleaching with and without application of bleaching agents. One hundred and forty-four mandibular incisor teeth were divided into four groups (n = 36) according to the use of halogen light, light-emitting diode, 3 W and 1.5 W diode laser. The teeth in the main groups were divided into three subgroups (n = 12). First subgroup had no bleaching gel application. By White and Whiteness HP were applied with a thickness of 2 mm to the other subgroups respectively. The labial surfaces of the teeth were irradiated with a total time of 20 s. Temperature changes in the pulp chamber were measured and analysed by using anova and Tukey test. The 3 W diode laser induced the highest pulp chamber temperature rise (P = 0.000). Bleaching gel application reduced the temperature changes in the diode laser groups (P < 0.05). Diode laser activation during vital bleaching induces pulp chamber temperature rise, which may cause thermal tissue damage.

The effect of bleaching gel and (940 nm and 980 nm) diode lasers photoactivation on intrapulpal temperature and teeth whitening efficiency

“…In the same way, Kivanc et al . reported a temperature decrease by 29% with gel in place when photoactivated by 915 nm diode laser at power settings of 3 W–20 s . Carrasco et al .…”

Comparison of Nd:YAG and Diode Laser Irradiation During Intracoronal Bleaching with Sodium Perborate: Color and Raman Spectroscopy Analysis

“…It penetrates deeply into dental hard tissues and achieves successful tooth whitening. 11,12 Although some studies investigated the efficacy of laser irradiation during intracoronal bleaching, no study has been conducted to investigate the changes in both color and enamel structure during intracoronal bleaching with laser irradiation. The aim of this study was to evaluate the color and enamel structure changes after intracoronal bleaching with sodium perborate under Nd:YAG and diode laser irradiation.…”

The Effect Of Light-Activated Bleaching On Increase Of Pulp Chamber Temperatures

“…Carrasco ve arkadaşları 12 yaptığı çalışma sonucunda kullandıkları diyot Lazer, plazma ark lambası, kuartz tungsten halojen ışık kaynaklarının LED' e kıyasla yüksek pulpa odası sıcaklık artışlarına neden olduğunu bildirmişlerdir. Sarı ve arkadaşları 13 16 Rhesus maymunlarında yaptıkları çalışmalarda; 2, 14, 56 ve 93 günlük periyotlar sonunda bilinen yüzeysel ısı artışlarını histolojik olarak gözlemlenebilir pulpal hasarlarla alakalandırmışlar ve bu amaçla pulpa duvarında istenilen sıcaklığa ulaşana kadar sağlıklı bir dişin bukkal yüzeyine 275 ° C ' lik lehim uygulamışlardır. Bu çalışmanın sonuçlarına göre 5.5 °C ısıtılan dişlerin %15' inin ve 11.1 °C ısıtılan dişlerin % 60' ının irreversibl hasar aldığını bildirmişlerdir.…”