title: Microleakage at the interface between composite veneering material and precious alloy surface constructed either by new metallurgical sintering technique or the conventional casting technique.
abstract: The new metallurgical sintering technique in construction of precious metallic structure of the resin veneered restorations was introduced recently in the prosthetic dental work. This study compared the microleakage at the interface between photocured composite veneering material and gold platinum alloy surface constructed either by the new sintering technique or the conventional casting technique. Two chemically adhesive systems were used, a) silicoater and b) Lee metal primer, in order to retain the veneering material. The samples were subjected to thermal cycling and the procedures used in determination microleakage were the radioactive isotope and the autoradiograph methods. Two time intervals were compared 1--one month and 3--three months. It was concluded that the two different techniques used in construction of the metallic part showed no statistical significant difference in microleakage at their interface with the veneering material retained either by silicoater or Lee metal primer systems.
authors.affiliation: Crown and Bridge Dept., Faculty of Oral and Dental Medicine, Cairo University.
authors.forename: A H
authors.initials: AH
authors.lastname: Sherif
mesh_terms: D003188:Composite Resins; D003442:Crowns / Q000009:adverse effects*; D001840:Dental Bonding; D003735:Dental Casting Technique; D003738:Dental Cements; D003763:Dental Leakage / Q000175:diagnosis / Q000209:etiology*; D003801:Dental Veneers; D004853:Epoxy Resins; D006047:Gold Alloys; D006801:Humans; D008422:Materials Testing / Q000379:methods; D010984:Platinum; D011897:Random Allocation; D012821:Silanes; D013499:Surface Properties; D013997:Time Factors
chemical_list: D003188:Composite Resins; D003738:Dental Cements; D004853:Epoxy Resins; D006047:Gold Alloys; C113150:Lee metal primer; D012821:Silanes; D010984:Platinum