title: In vitro analysis of thermocompaction time and gutta-percha type on quality of main canal and lateral canals filling.
abstract: The aim of this study was to evaluate the quality of filling in main and lateral root canals performed with the McSpadden technique, regarding the time spent on the procedure and the type of gutta-percha employed. Fifty simulated root canals, made with six lateral canals placed two apiece in the cervical, middle and apical thirds of the root, were divided into 5 groups. Group A: McSpadden technique with conventional gutta-percha, performed with sufficient time for canal filling; Group B: McSpadden technique with conventional gutta-percha, performed in twice the mean time used in Group A; Group C: McSpadden technique with TP gutta-percha, performed with sufficient time for canal filling; Group D: McSpadden technique with TP gutta-percha, performed in twice the mean time used in Group C; Group E: lateral condensation technique. Images of the filled root canals were taken using a stereomicroscope and analyzed using the Leica QWIN Pro software for filling material flow, gutta-percha filling extension and sealer flow. Data were analyzed by analysis of variance (ANOVA) and Tukey test (p < 0.05). The best values of penetration in lateral canals in the middle third occurred in the groups where TP gutta-percha was used. However, in the apical third, group B showed the best values. Although a longer time of compactor use allows greater penetration of the filling material into the lateral canals, the presence of voids resulted in bad quality radiographic images, suggesting porosity. The best quality of filling material was observed in Group A (McSpadden technique with conventional Gutta-Percha, performed with sufficient time for root canal filling).
authors.affiliation: Department of Endodontics, Dental School, Universidade Tuiuti do Paraná, Curitiba, PR, Brazil. andremichelotto@hotmail.com
authors.forename: André Luiz da Costa
authors.initials: AL
authors.lastname: Michelotto
authors.forename: Cacio
authors.initials: C
authors.lastname: Moura-Netto
authors.forename: Angela Toshie
authors.initials: AT
authors.lastname: Araki
authors.forename: Eduardo
authors.initials: E
authors.lastname: Akisue
authors.forename: Abílio Albuquerque Maranhão
authors.initials: AA
authors.lastname: Moura
authors.forename: Gilson Blitzkow
authors.initials: GB
authors.lastname: Sydney
mesh_terms: D000704:Analysis of Variance; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging; D006171:Gutta-Percha / Q000737:chemistry*; D006358:Hot Temperature; D008422:Materials Testing; D011859:Radiography; D012389:Root Canal Obturation / Q000379:methods*; D018709:Statistics, Nonparametric; D013997:Time Factors
chemical_list: D006171:Gutta-Percha