title: IS GUTTACORE MORE EASILY REMOVED FROM THE ROOT CANAL THAN THERMAFIL? AN EX-VIVO STUDY.
abstract: GuttaCore is a new cross-linked gutta-percha carrier. Its handling time and ease of removal were compared with those of a plastic carrier (Thermafil) and the continuous wave of condensation technique (control). Forty-five maxillary central incisors were randomly divided 3 groups according to filling technique and retreatment was carried out in all samples with NiTi rotary files, hand files and ultrasonic inserts. Time required for filling removal was recorded. Roots were then split longitudinally and photographed under 5x magnification, and residual filling material was quantified. Removal time was significantly longer for Thermafil (7.10 minutes) than GuttaCore (2.91 minutes) and the control group (1.93 minutes) (p < 0.001). The amount of residual filling material did not differ among the groups: Thermafil 8.31%, GuttaCore 6.27 and control 8.68% (p > 0.05). In conclusion, replacing plastic core with cross-linked gutta-percha allows easier removal of carrier from the root canal. The remnants of filling material in all samples illustrate that retreatment remains a challenge in endodontics.
authors.affiliation: University of Pernambuco, Avenida Gal Newton Cavalcanti, Tabatinga, Camaragibe, PE, Brazil.
authors.forename: Giselle
authors.initials: G
authors.lastname: Nevares
authors.forename: Diana Santana
authors.initials: DS
authors.lastname: de Albuquerque
authors.forename: Carlos Eduardo da Silveira
authors.initials: CE
authors.lastname: Bueno
authors.forename: Rodrigo Sanches
authors.initials: RS
authors.lastname: Cunha
mesh_terms: D003786:Dental Pulp Cavity; D006171:Gutta-Percha / Q000737:chemistry*; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D019233:Retreatment; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012389:Root Canal Obturation / Q000379:methods*; D013997:Time Factors
chemical_list: D012387:Root Canal Filling Materials; D006171:Gutta-Percha