title: Pore distribution and fracture localization of flame-soldered joints in dental gold. A metallographic and microfractographic study.
abstract: The occurrence of pores and fatigue fractures in flame-soldered joints of dental gold was measured using fractograms and metallographic preparations. All soldered joints contained pores localized mainly in the solder material adjacent to casting/solder and solder/solder interfaces. The porosity portion of these regions was 20-40 volume per cent, consisting chiefly of pores smaller than 0.1 mm. The fatigue fractures were nearly always situated in the same regions or along the casting surfaces themselves.
mesh_terms: D003734:Dental Casting Investment; D012994:Dental Soldering; D006047:Gold Alloys; D006801:Humans; D008669:Metallurgy; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D003734:Dental Casting Investment; D006047:Gold Alloys