title: A comparison of sealer placement techniques in curved canals.
abstract: Sealer placement techniques have not been examined in teeth with curved canals prepared with Lightspeed instruments. Three traditional methods of placing sealer were studied, using 45 extracted human single-rooted teeth, divided into 3 groups of 15. Root canal preparations were made with Light-speed nickel-titanium, engine-driven instruments. AH26 sealer was applied with either K-file, lentulo spiral, or master gutta-percha cone. Radiographs were taken after sealer placement and analyzed for amount of canal sealer fill. The teeth were then obturated with laterally condensed gutta-percha, chemically cleared, photographed, and analyzed for total canal wall sealer coverage. The results showed a statistically significant difference in canal sealer fill among the three groups before obturation, but there was no statistical difference in canal wall coverage among the three groups after obturation. None of the examined methods exceeded an average of 62.5% wall coverage of sealer after obturation. This suggests that complete wall coverage after obturation may not be possible.
authors.affiliation: Department of Endodontics, Wilford Hall USAF Medical Center, Lackland Air Force Base, TX, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Hall
authors.forename: D J
authors.initials: DJ
authors.lastname: Clement
authors.forename: S B
authors.initials: SB
authors.lastname: Dove
authors.forename: W A
authors.initials: WA
authors.lastname: Walker
mesh_terms: D000704:Analysis of Variance; D001641:Bicuspid; D001729:Bismuth; D003481:Cuspid; D018772:Dental Marginal Adaptation; D003786:Dental Pulp Cavity / Q000033:anatomy & histology*; D004338:Drug Combinations; D004853:Epoxy Resins; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D007180:Incisor; D008709:Methenamine; D011897:Random Allocation; D015203:Reproducibility of Results; D012387:Root Canal Filling Materials; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation; D012834:Silver; D014025:Titanium
chemical_list: D004338:Drug Combinations; D004853:Epoxy Resins; D012387:Root Canal Filling Materials; D012834:Silver; C028044:epoxy resin AH-26; D014025:Titanium; D008709:Methenamine; D001729:Bismuth