title: Leakage along warm gutta-percha fillings in the apical canals of curved roots.
abstract: The aim of this study was to investigate the leakage along the apical portion of warm gutta-percha obturated curved canals. Human mandibular premolars with single, curved (21 degrees-40 degrees) canals were prepared using the Lightspeed technique. Two groups of prepared canals, matched according to curvature and prevalence of apical transportation, were obturated by two techniques. Coronal gutta-percha was removed immediately after root obturation was completed to simulate the procedure for post space preparation. Leakage along the apical 3 mm of root filling was measured with a fluid transport device. Vertical condensation of warm gutta-percha and Pulp Canal Sealer provided less leakage than Thermafil plastic obturators and AH26 sealer (P = 0.002).
authors.affiliation: Department of Cariology and Endodontology, College of Stomatology, Hubei Medical University, Wuhan, China.
authors.forename: B
authors.initials: B
authors.lastname: Fan
authors.forename: M K
authors.initials: MK
authors.lastname: Wu
authors.forename: P R
authors.initials: PR
authors.lastname: Wesselink
mesh_terms: D001641:Bicuspid; D001729:Bismuth / Q000627:therapeutic use; D003763:Dental Leakage / Q000145:classification*; D003786:Dental Pulp Cavity / Q000473:pathology*; D004202:Disinfectants / Q000627:therapeutic use; D004338:Drug Combinations; D004853:Epoxy Resins; D006171:Gutta-Percha / Q000627:therapeutic use*; D006801:Humans; D008709:Methenamine / Q000627:therapeutic use; D010969:Plastics / Q000627:therapeutic use; D011176:Post and Core Technique; D012387:Root Canal Filling Materials / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D012834:Silver / Q000627:therapeutic use; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D018709:Statistics, Nonparametric; D014025:Titanium / Q000627:therapeutic use; D019227:Tooth Apex / Q000473:pathology*; D014092:Tooth Root / Q000473:pathology*
chemical_list: D004202:Disinfectants; D004338:Drug Combinations; D004853:Epoxy Resins; D010969:Plastics; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D012834:Silver; C028044:epoxy resin AH-26; D006171:Gutta-Percha; D014025:Titanium; D012973:Sodium Hypochlorite; D008709:Methenamine; D001729:Bismuth