title: Dye leakage in retrofilled dog teeth and its correlation with radiographic healing.
abstract: In a previous study in beagle dogs, statistically significant differences in healing were observed radiographically 6 months after apicoectomy and retrofilling with amalgam and varnish, glass ionomer cement, or a composite resin. The purpose of this study was to compare the leakage of these retrofilling materials and to correlate leakage data with healing. After the dogs were sacrificed, 48 roots were extracted. Half of the roots had been irradiated with a CO2 laser on the bevelled root surface after retrofilling. The roots were coated with nail polish, except for their bevelled surface, and were suspended together with positive and negative controls in 2% methylene blue for 8 h. After the specimens were longitudinally split, they were ranked according to the severity of dye penetration, as observed with a dissecting microscope. The differences in dye leakage among the three retrofilling materials were not statistically significant. Consequently, dye leakage did not correlate with the previously assessed healing. Dye penetrated into the root through the bevelled root surface, regardless of CO2 laser exposure of that surface.
authors.affiliation: Department of Endodontics, Hebrew University--Hadassah School of Dental Medicine, Jerusalem.
authors.forename: S
authors.initials: S
authors.lastname: Friedman
authors.forename: I
authors.initials: I
authors.lastname: Rotstein
authors.forename: L
authors.initials: L
authors.lastname: Koren
authors.forename: M
authors.initials: M
authors.lastname: Trope
mesh_terms: D000818:Animals; D001047:Apicoectomy; D003188:Composite Resins; D003723:Dental Amalgam; D003763:Dental Leakage / Q000517:prevention & control*; D003806:Dentin Permeability / Q000528:radiation effects*; D004285:Dogs; D005899:Glass Ionomer Cements; D053685:Laser Therapy; D012184:Retrograde Obturation; D012387:Root Canal Filling Materials
chemical_list: D003188:Composite Resins; D005899:Glass Ionomer Cements; D012387:Root Canal Filling Materials; C037885:Fuji-ionomer; D003723:Dental Amalgam; C059919:Estilux posterior