title: A comparison of techniques for obturating oval-shaped root canals.
abstract: This study compared the effectiveness of three obturation techniques for oval-shaped canals. Roots of 42 extracted teeth with oval canals were randomly divided into three groups: (1) ProTaper canal preparation and single cone obturation with matching gutta-percha point; (2) ProTaper preparation plus thermoplastic obturation (Thermafil); (3) Profile .06 taper and matching master cone with lateral condensation. Cross-sectional area of the canal space occupied by sealer cement and gutta-percha was measured in the coronal, middle, and apical thirds using an image analysis software. The percentage of the cross-sectional shape occupied by sealer cement was calculated. The Thermafil group was significantly lower than the single cone group or the lateral condensation group in the middle third (p<0.01) and lower than the single cone group in the coronal third (p<0.05). There were no significant differences between the single cone obturation group and the lateral condensation group in each level.
authors: Department of Periodontics and Endodontics, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama 230-8501, Japan. ozawa-t@tsurumi-u.ac.jp
authors: Toshiko
authors: T
authors: Ozawa
authors: Nessrin
authors: N
authors: Taha
authors: Harold H
authors: HH
authors: Messer
mesh_terms: D001391:Azo Compounds; D004396:Coloring Agents; D003722:Dental Alloys; D003786:Dental Pulp Cavity / Q000473:pathology*; D003804:Dentin / Q000473:pathology; D006171:Gutta-Percha / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D009281:Naphthalenes; D009532:Nickel; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use; D012388:Root Canal Irrigants / Q000627:therapeutic use; D012389:Root Canal Obturation / Q000379:methods*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D016369:Smear Layer; D012973:Sodium Hypochlorite / Q000627:therapeutic use; D013499:Surface Properties; D014025:Titanium
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D003722:Dental Alloys; D009281:Naphthalenes; D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; C040654:titanium nickelide; D009532:Nickel; D006171:Gutta-Percha; C016118:Sudan Black B; D014025:Titanium; D012973:Sodium Hypochlorite