Comparative Evaluation of the Bond Strength of Different Base Metal Alloys With Porcelain-An Invitro Study

Aim: To evaluate and compare the porcelain bond strength of Nickel-Chromium and Cobalt-Chromium alloys. Materials and Methods: The alloy systems used in the study were one proprietary brand each of nickelchromium and cobalt-chromium alloy typeCommendand Lithecast respectively. For the porcelain bond strength study, five test specimens were made each with Commend and Lithecast. The Vintage porcelain system was employed for the porcelain application. The specimens were tested on Instron testing machine. Results: Student‘t’ test revealed no significant difference in the porcelain bond strength between nickelchromium and cobalt-chromium alloysCommend and Lithecast respectively. Conclusion: Within the limitations of the study, no significant difference was noted between nickelchromium and 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.