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  Indian J Med Microbiol
 

Figure 7: (a and b): Tested porcelain veneered zirconia 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 presence of veneering ceramic on the zirconia substructure suggesting cohesive failure of the veneering porcelain. High magnification of fractured veneer surface and tested zirconia surface shows numerous pores in the veneering ceramic

Figure 7: (a and b): Tested porcelain veneered zirconia 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 presence of veneering ceramic on the zirconia substructure suggesting cohesive failure of the veneering porcelain. High magnification of fractured veneer surface and tested zirconia surface shows numerous pores in the veneering ceramic