title: Use of fluid filtration method to evaluate the effect of master cone size on the apical seal of severely curved root canals.
abstract: The apical third of most root canals shows some degree of curvature, which is important in cleaning/shaping and obturation during root canal treatment. The present study evaluated the effect of master cone size on the apical seal of severely curved root canals. Thirty-eight mesial roots of human mandibular first molars were prepared using the crown-down technique. All samples were mature roots with closed apices, had no carious lesions or resorption, and had a canal curvature of > 45º to 60º. Two samples were used as a negative and positive control to evaluate the fluid filtration equipment, and the remaining 36 samples were equally divided into groups A, B, and C based on master cone size, namely, gutta-percha #20, #25, and #30, respectively. The fluid filtration method was used to evaluate microleakage. No significant difference in microleakage was observed among groups (P = 0.31). In conclusion, an increase in master cone size up to #30 does not significantly influence apical microleakage.
authors.affiliation: Dental Material Research Center, Department of Endodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Saeed
authors.initials: S
authors.lastname: Moradi
authors.forename: Reza
authors.initials: R
authors.lastname: Disfani
authors.forename: Hani
authors.initials: H
authors.lastname: Baziar
authors.forename: Farzaneh
authors.initials: F
authors.lastname: Daneshvar
authors.forename: Hamid
authors.initials: H
authors.lastname: Jafarzadeh
mesh_terms: D001729:Bismuth / Q000627:therapeutic use; D001840:Dental Bonding; D003763:Dental Leakage / Q000145:classification*; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D004492:Edetic Acid / Q000627:therapeutic use; D004853:Epoxy Resins / Q000627:therapeutic use; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D006171:Gutta-Percha / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D008963:Molar / Q000033:anatomy & histology; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000295:instrumentation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D012834:Silver / Q000627:therapeutic use; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D013499:Surface Properties; D014025:Titanium / Q000627:therapeutic use; D019227:Tooth Apex / Q000033:anatomy & histology*
chemical_list: D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D012834:Silver; C028044:epoxy resin AH-26; D006171:Gutta-Percha; D004492:Edetic Acid; D014025:Titanium; D012973:Sodium Hypochlorite; D001729:Bismuth