title: In vitro assessment of pulp chamber temperature of different teeth submitted to dental bleaching associated with LED/laser and halogen lamp appliances.
abstract: This study sought to assess the pulp chamber temperature in different groups of human teeth that had been bleached using hydrogen peroxide gel activated with halogen lamps or hybrid LED/laser appliances. Four groups of ten teeth (maxillary central incisors, mandibular incisors, mandibular canines, and maxillary canines) were used. A digital thermometer with a K-type thermocouple was placed inside pulp chambers that had been filled with thermal paste. A 35% hydrogen peroxide-based red bleaching gel was applied to all teeth and photocured for a total of three minutes and 20 seconds (five activations of 40 seconds each), using light from an LED/laser device and a halogen lamp. The temperatures were gauged every 40 seconds and the data were analyzed by three-way ANOVA, followed by Tukey's test. Regardless of the light source, statistically significant differences were observed between the groups of teeth. The mean temperature values (+/- SD) were highest for maxillary central incisors and lowest for mandibular canines. The halogen lamp appliance produced more pulp chamber heating than the LED/laser appliance. The increase in irradiation time led to a significant increase in temperature.
authors.affiliation: Sao Jose dos Campos School of Dentistry, Sao Paulo State University, SP, Brazil.
authors.forename: Carlos Rocha Gomes
authors.initials: CR
authors.lastname: Torres
authors.forename: Taciana Marco Ferraz
authors.initials: TM
authors.lastname: Caneppele
authors.forename: Felipe Carlos Dias
authors.initials: FC
authors.lastname: Arcas
authors.forename: Alessandra Buhler
authors.initials: AB
authors.lastname: Borges
mesh_terms: D000704:Analysis of Variance; D001831:Body Temperature; D003481:Cuspid; D003782:Dental Pulp; D006219:Halogens; D006801:Humans; D006861:Hydrogen Peroxide / Q000528:radiation effects; D066298:In Vitro Techniques; D007180:Incisor; D007834:Lasers; D008027:Light; D016877:Oxidants / Q000528:radiation effects; D012666:Semiconductors; D018709:Statistics, Nonparametric; D014073:Tooth Bleaching
chemical_list: D006219:Halogens; D016877:Oxidants; D006861:Hydrogen Peroxide