title: Radiograph stress measurement of porcelain fused to metal.
abstract: Radiograph stress measurements of precious metals were obtained. The compression stress of approximately -15 kg/mm2 after polishing was reduced by degassing to approximately -8 kg/mm2. In the case of precious metal strips 0.35 mm thick and a porcelain thickness that exceeded approximately 0.5 mm, the surface of the stress measurement was stretched in the longitudinal direction. This result is consistent with the curvature change. The stress behavior at various stages of the firing cycle for porcelain-fused-to-metal crowns was evaluated. The basic data obtained should allow for construction of more satisfactorily fitting restorations.
mesh_terms: D003722:Dental Alloys; D001840:Dental Bonding; D003776:Dental Porcelain; D005069:Evaluation Studies as Topic; D011859:Radiography; D013314:Stress, Mechanical
chemical_list: D003722:Dental Alloys; D003776:Dental Porcelain