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  Indian J Med Microbiol
 

Figure 6: (a and b): Tested porcelain veneered base metal alloy samples after 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 both adhesive and cohesive failure, but predominantly cohesive failure within the veneering porcelain. High magnification of fractured veneer surface shows traces of metal oxide. Many pores are visible within the veneering ceramic

Figure 6: (a and b): Tested porcelain veneered base metal alloy samples after 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 both adhesive and cohesive failure, but predominantly cohesive failure within the veneering porcelain. High magnification of fractured veneer surface shows traces of metal oxide. Many pores are visible within the veneering ceramic