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  Indian J Med Microbiol
 

Figure 5: (a and b): Tested porcelain veneered base metal alloy samples before aging under 30× (a) and 250× (b) magnification. (c and d) Fractured veneer surface under 30× (c) and 250× (d) magnification. Arrow indicates the direction of load. The loaded side demonstrates cohesive failure within the veneering porcelain. Many pores are visible within the veneering ceramic where the fracture originated. Fractured veneer surface does not show metal oxide layer suggesting cohesive failure of veneering ceramic

Figure 5: (a and b): Tested porcelain veneered base metal alloy samples before aging under 30× (a) and 250× (b) magnification. (c and d) Fractured veneer surface under 30× (c) and 250× (d) magnification. Arrow indicates the direction of load. The loaded side demonstrates cohesive failure within the veneering porcelain. Many pores are visible within the veneering ceramic where the fracture originated. Fractured veneer surface does not show metal oxide layer suggesting cohesive failure of veneering ceramic