title: Retrograde seal in ultrasonically prepared canals.
abstract: The sealing ability of various retrofilling materials was compared. The root canals of 85 single-rooted teeth were cleansed and obturated with gutta-percha without sealer using lateral condensation. The apical 3 mm of the roots were resected and divided into positive control, negative control, and five experimental groups. The experimental teeth received root-end cavity preparation to 3 mm depth using an ultrasonic retroprep tip. The retrocavities were dried and divided into five groups to receive the following materials: amalgam with varnish, amalgam with Clearfil Liner Bond II, thermoplasticized gutta-percha (TGP) with sealer, Ketac-fil, and Super-EBA. After immersion in India ink for 7 days, the roots were demineralized, cleared, and evaluated for dye leakage under a stereomicroscope. Statistical analysis showed that Super-EBA, Ketac-fil, and TGP with sealer demonstrated less leakage than amalgam with varnish and amalgam with Clearfil Liner Bond II (p < 0.05). Super-EBA also leaked significantly less than Ketac-fil or TGP sealer (p < 0.05). No significant difference was found between Ketac-fil and TGP or between the two groups filled with amalgam (p > 0.05).
authors.affiliation: Department of Operative Dentistry, Mahidol University, 6 Yothi Street, Rajathewee, Bangkok 10400, Thailand.
authors.forename: S
authors.initials: S
authors.lastname: Sutimuntanakul
authors.forename: W
authors.initials: W
authors.lastname: Worayoskowit
authors.forename: C
authors.initials: C
authors.lastname: Mangkornkarn
mesh_terms: D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control*; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006171:Gutta-Percha; D006801:Humans; D007764:Lacquer; D008298:Maleates; D008689:Methacrylates; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation / Q000295:instrumentation*; D019227:Tooth Apex; D014465:Ultrasonics; D015035:Zinc Oxide-Eugenol Cement
chemical_list: C112274:Clearfil Liner Bond 2; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D008298:Maleates; D008689:Methacrylates; D012387:Root Canal Filling Materials; D015035:Zinc Oxide-Eugenol Cement; D003723:Dental Amalgam; C084074:Super EBA; C040964:Ketac-Fil; D006171:Gutta-Percha