title: 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.
authors: Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
authors: Bağdagül Helvacioğlu
authors: BH
authors: Kivanç
authors: Hacer Deniz
authors: HD
authors: Arisu
authors: Özgür İlke Atasoy
authors: Öİ
authors: Ulusoy
authors: Baran Can
authors: BC
authors: Sağlam
authors: Güliz
authors: G
authors: Görgül
mesh_terms: D000704:Analysis of Variance; D055117:Curing Lights, Dental / Q000009:adverse effects* / Q000145:classification; D003782:Dental Pulp / Q000502:physiology*; D003786:Dental Pulp Cavity / Q000502:physiology*; D006801:Humans; D007180:Incisor; D013696:Temperature; D014073:Tooth Bleaching / Q000379:methods*; D058205:Tooth Bleaching Agents / Q000627:therapeutic use
chemical_list: D058205:Tooth Bleaching Agents