title: In vivo findings associated with heat generation during thermomechanical compaction of gutta-percha. 1. Temperature levels at the external surface of the root.
abstract: Temperature elevations of 10 degrees C above body temperature, of duration greater than 1 minute, may be sufficient to cause bone tissue injury. Temperature rises on the root surface in excess of 10 degrees C have been shown in studies in vitro of thermoplasticized gutta-percha root filling techniques. To determine whether results in vitro at room temperature could be extrapolated to conditions in vivo, temperature elevations were recorded at the mid-point on the root surface of the canine tooth in the ferret during thermomechanical compaction of gutta-percha. The time taken for the temperature to return to normal was also measured. There was no statistically significant difference between temperature elevations recorded in vitro and those measured in vivo. A linear extrapolation may therefore be made from results recorded at room temperature. Temperature elevations dissipated more rapidly in vivo than in vitro; this may be due to the cooling effect of the microvasculature of the periodontal membrane.
authors.affiliation: Dental School, The University, Dundee, Scotland, UK.
authors.forename: E M
authors.initials: EM
authors.lastname: Saunders
mesh_terms: D000818:Animals; D001831:Body Temperature; D003481:Cuspid; D005289:Ferrets; D006171:Gutta-Percha / Q000008:administration & dosage*; D006358:Hot Temperature; D008297:Male; D012389:Root Canal Obturation / Q000009:adverse effects* / Q000379:methods; D014092:Tooth Root
chemical_list: D006171:Gutta-Percha