title: Leakage in vitro with high-temperature thermoplasticized gutta-percha, high copper amalgam, and warm gutta-percha when used as retrofilling materials.
abstract: An in vitro dye leakage study was performed to compare the sealing ability of high-temperature thermoplasticized gutta-percha, high copper amalgam, and warm gutta-percha when used as retrofilling materials. Forty-five extracted anterior teeth were obturated with gutta-percha, the apical 3 mm of the roots were resected, and 2-mm-deep retrograde preparations were prepared. The roots were then randomly placed into three groups and retrofilled with one of the experimental materials. After 72 h in India ink, the teeth were cleared and evaluated for leakage using a stereomicroscope. No leakage was evident in the three teeth used as negative controls. Complete leakage was noted in the three positive control teeth. Statistical analysis of the results showed that high-temperature thermoplasticized gutta-percha had significantly less leakage than did high copper amalgam.
authors.forename: M G
authors.initials: MG
authors.lastname: MacPherson
authors.forename: G R
authors.initials: GR
authors.lastname: Hartwell
authors.forename: D L
authors.initials: DL
authors.lastname: Bondra
authors.forename: R N
authors.initials: RN
authors.lastname: Weller
mesh_terms: D003300:Copper; D003723:Dental Amalgam; D003763:Dental Leakage; D006171:Gutta-Percha; D006358:Hot Temperature; D006801:Humans; D012184:Retrograde Obturation
chemical_list: D003300:Copper; D003723:Dental Amalgam; D006171:Gutta-Percha