title: In vitro infrared thermographic assessment of root surface temperature rises during thermafil retreatment using system B.
abstract: The purpose of this in vitro study was to measure the temperature rise on the outer root surface during retreatment of Thermafil using the System B HeatSource. Twenty extracted human maxillary premolars were filled with Thermafil with plastic carriers and divided into two groups of 10 teeth each. In group 1, Thermafil obturators were retrieved using System B HeatSource fitted with a medium plugger at a temperature of 225 degrees C. The plugger was placed first on the buccal, then on the lingual of the plastic carrier for 5 s each. This melted the gutta-percha and softened the plastic carrier. In group 2, Thermafil obturators were retrieved in the same manner except that the heated plugger was placed for 8 s. The temperature changes on the outer root surfaces were recorded using a thermal imaging camera. Thermafil retreatment in vitro using a System B HeatSource causes temperature rises ranging from 26.7 degrees C to 46.0 degrees C. This finding could possibly have implications for creating injury of the periodontal tissues.
authors.affiliation: Department of Conservative Dentistry, Pomeranian Academy of Medicine, Szczecin, Poland.
authors.forename: Mariusz
authors.initials: M
authors.lastname: Lipski
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Woźniak
mesh_terms: D001641:Bicuspid / Q000503:physiopathology; D001831:Body Temperature / Q000502:physiology*; D016001:Confidence Intervals; D004867:Equipment Design; D006171:Gutta-Percha / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D007259:Infrared Rays; D010969:Plastics / Q000737:chemistry; D019233:Retreatment; D012389:Root Canal Obturation / Q000295:instrumentation* / Q000379:methods; D013499:Surface Properties; D013817:Thermography / Q000295:instrumentation; D014092:Tooth Root / Q000503:physiopathology*
chemical_list: D010969:Plastics; D006171:Gutta-Percha