title: Apical extrusion of thermoplasticized obturating material in canals instrumented with Profile 0.06 or Profile GT.
abstract: The purpose of this in vitro study was to compare the extrusion of thermoplacticized gutta-percha in teeth instrumented with Profile 0.06 or Profile GT, and obturated with Thermafil Plus and Thermafil GT, respectively. A total of 120, extracted, human maxillary central incisors were divided into four equal groups. Group 1 was instrumented with Profile 0.06 and obturated with Thermafil Plus. Group 2 was instrumented with Profile 0.06 and obturated using warm vertical condensation (negative control). Group 3 was instrumented with Profile GT and obturated with Thermafil GT. Group 4 was instrumented with Profile GT and obturated like Group 2 (negative control). Extrusion was graded as present or absent. Results found 9 of 30 extruded for group 1, 1 of 30 for group 2, 15 of 30 for group 3, and 2 of 30 for group 4. The results suggest that, in vitro, Thermafil GT may be more prone to extruding gutta-percha past the apical foramen than Thermafil Plus.
authors.affiliation: School of Dentistry, University of Michigan, 1011 N. University, Ann Arbor, MI 48108, USA.
authors.forename: Mark J
authors.initials: MJ
authors.lastname: Robinson
authors.forename: N J
authors.initials: NJ
authors.lastname: McDonald
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Mullally
mesh_terms: D016009:Chi-Square Distribution; D003786:Dental Pulp Cavity / Q000473:pathology*; D004867:Equipment Design; D005547:Foreign Bodies / Q000209:etiology*; D006171:Gutta-Percha / Q000009:adverse effects*; D006358:Hot Temperature; D006801:Humans; D007180:Incisor / Q000473:pathology; D012387:Root Canal Filling Materials / Q000009:adverse effects*; D012389:Root Canal Obturation / Q000009:adverse effects* / Q000295:instrumentation; D018915:Root Canal Preparation / Q000295:instrumentation*; D016037:Single-Blind Method; D019227:Tooth Apex / Q000473:pathology*
chemical_list: D012387:Root Canal Filling Materials; D006171:Gutta-Percha