title: Residual stresses in metal-ceramic crowns.
abstract: Residual stresses in metal-ceramic crowns were examined in three different ways. First, a mathematical formula was used to calculate the stresses in the cervical part of a crown. Second, plastic models was used where the strains were measured with strains-gauges. Third, real crowns were used and strain gauges were attached on them. The results indicated that compressive stresses appeared in the porcelain-metal interface. Compressive stresses were also found on the surfaces of the crowns and tensile stresses perpendicular to the interface.
mesh_terms: D003442:Crowns; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D004548:Elasticity; D006047:Gold Alloys; D003765:Models, Dental; D013718:Tensile Strength; D013816:Thermodynamics
chemical_list: D006047:Gold Alloys; D003776:Dental Porcelain