title: Leakage of amalgam and Super-EBA root-end fillings using two preparation techniques and surgical microscopy.
abstract: An in vitro dye leakage study was conducted to test the root-end sealing ability of amalgam with varnish or Super-EBA using two root-end preparation techniques and surgical microscopy. Sixty-four single-rooted teeth were instrumented and obturated with gutta-percha. Teeth were randomly placed into four groups. Two groups received perpendicular root-end resections, 3-mm-deep ultrasonic root-end preparations, and either amalgam with varnish or Super-EBA root-end fillings. The other two groups received beveled root-end resections, 3-mm-deep micro-handpiece preparations, and either amalgam with varnish or Super-EBA. All root-end procedures were performed at x5 to x8 magnification. Micro-leakage was assessed at 4 months using methylene blue dye and a passive hydrostatic pressure technique. Statistical analysis showed that, regardless of technique, Super-EBA leaked significantly less than amalgam with varnish. There was no significant difference between the two root-end resection and preparation techniques.
authors.affiliation: Endodontics Department, Naval Dental School, National Naval Dental Center, Bethesda, MD 20889-5602, USA.
authors.forename: R P
authors.initials: RP
authors.lastname: O'Connor
authors.forename: J W
authors.initials: JW
authors.lastname: Hutter
authors.forename: J O
authors.initials: JO
authors.lastname: Roahen
mesh_terms: D016009:Chi-Square Distribution; D003723:Dental Amalgam; D003763:Dental Leakage; D017220:Dentin-Bonding Agents; D006801:Humans; D015588:Observer Variation; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials; D014464:Ultrasonic Therapy
chemical_list: D017220:Dentin-Bonding Agents; D012387:Root Canal Filling Materials; D003723:Dental Amalgam; C084074:Super EBA