title: Intra-pulpal temperature rise of different tooth types during dental bleaching supported by an Er,Cr:YSGG laser. A pilot study.
abstract: The purpose of this pilot in vitro study was to evaluate the temperature increase in the pulp chamber of the teeth, during Er,Cr:YSGG bleaching, as well as to show which teeth are the most susceptible in terms of pulp temperature increase during laser-activated bleaching treatment. Although Er:YAG studies have been published on this subject, it is the first time Er,Cr:YSGG wavelength is tested. Fifteen teeth were tested--3 each of the following--(maxillary central incisors, lateral incisors, canines, premolars and mandibular incisors). The bleaching procedure comprised an Er,Cr:YSGG laser (2780 nm, Waterlase MD, Biolase, USA) and a yellow-coloured bleaching agent with a concentration of 38 % H2O2 (Power whitening, WHITEsmile GmbH, Germany). The tip used was a 6-mm long Z-type glass tip (MZ8) of a 800 μm diameter. Average output power was set to 1.25 W, pulse duration 700 μs (S-mode), whilst the pulse repetition rate was 10 Hz. The results showed that the most susceptible teeth in terms of pulp temperature increase were the lateral maxillary incisors and the mandibular incisors. The mean temperature increase on these teeth was 1.06 and 1.00 °C, respectively, on 60 s Er,Cr:YSGG-supported bleaching.
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece. dimitris.strakas@gmail.com.
authors.forename: D
authors.initials: D
authors.lastname: Strakas
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
authors.forename: K
authors.initials: K
authors.lastname: Tolidis
authors.affiliation: Department of Operative Dentistry, School of Dentistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
authors.forename: E
authors.initials: E
authors.lastname: Koliniotou-Koumpia
authors.affiliation: Department of RWTH Uniklinikum, Aachen, Germany.
authors.forename: L
authors.initials: L
authors.lastname: Vanweersch
authors.affiliation: Department of RWTH Uniklinikum, Aachen, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Franzen
authors.affiliation: Department of RWTH Uniklinikum, Aachen, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Gutknecht
mesh_terms: D003786:Dental Pulp Cavity / Q000187:drug effects / Q000528:radiation effects*; D006801:Humans; D053844:Lasers, Solid-State; D010865:Pilot Projects; D013696:Temperature; D014070:Tooth / Q000187:drug effects / Q000528:radiation effects*; D014073:Tooth Bleaching
keywords: Dental lasers; Er,Cr:YSGG; Laser bleaching; Laser whitening; Teeth bleaching; Teeth whitening; Temperature increase