Results: Student't' test revealed no significant difference in the porcelain bond strength between nickelchromium and cobalt-chromium alloys-Commend and Lithecast respectively.
Conclusion: Within the limitations of the study, no significant difference was noted between nickel-chromiumand cobalt-chromium alloy with respect to the bond strength with porcelain. Hence taking into consideration the economic effectiveness of nickel-chromium alloys, they can be used as the core material for metal-ceramic restorations in place of cobalt-chromium alloys except in nickel-allergic patients.
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