title: An in vitro evaluation of injectable thermoplasticized gutta-percha, glass ionomer, and amalgam when used as retrofilling materials.
abstract: An in vitro dye leakage study was performed to evaluate the sealing ability of the following retrofilling materials: high- and low-temperature injectable thermoplasticized gutta-percha with and without sealer, a glass ionomer cement, and amalgam with and without varnish. The roots of 105 extracted human maxillary anterior teeth were instrumented and obturated with single cones of gutta-percha and sealer. The apical 3 mm of the roots were then resected and 2-mm deep retrograde preparations were prepared. Each root was then randomly placed into one of seven groups and retrofilled with one of the test materials. After 72 h in India ink, the roots were cleared and evaluated for leakage using a stereomicroscope. Statistical analysis of the results indicated that injectable high-temperature gutta-percha without sealer demonstrated significantly more leakage than the other materials. There were no significant differences in leakage among the other evaluated materials.
authors.affiliation: U.S. Army Dental Activity, Fort Campbell, KY.
authors.forename: A K
authors.initials: AK
authors.lastname: Olson
authors.forename: M G
authors.initials: MG
authors.lastname: MacPherson
authors.forename: G R
authors.initials: GR
authors.lastname: Hartwell
authors.forename: R N
authors.initials: RN
authors.lastname: Weller
authors.forename: J C
authors.initials: JC
authors.lastname: Kulild
mesh_terms: D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control; D005899:Glass Ionomer Cements; D006171:Gutta-Percha / Q000008:administration & dosage*; D006801:Humans; D012184:Retrograde Obturation / Q000379:methods*; D012387:Root Canal Filling Materials
chemical_list: D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials; D003723:Dental Amalgam; D006171:Gutta-Percha