The Effect of Various Combinations of New and Recast Ni-Cr Ceramo Metal Alloys On the Mechanical Properties
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2018, Vol 17, Issue 7
Abstract
Statement of the Problem: Dental casting alloys have been reused routinely in dental laboratories by combining it with fresh alloys. This combination work of the new and used alloys should not affect the mechanical properties of the dental casting restoration. Materials & Methods: Ni-Cr ceramo-metal dental casting alloys were evaluated in four combinations of 100% fresh alloy, 50% fresh alloy with 50% recast alloy,25% fresh alloy with 75% recast alloy and 100% recast alloy. The mechanical properties tested in this study were modulous of elasticity, yield strength, percentage elongation, and tensile strength.A total of 24 samples were prepared,six samples per group and tested for tension testing to determine the mechanical properties. Results: The mechanical properties decreased from group I to group IV, but the values for group II and group III were within recommended limits for a ceramometal alloy. Conclusion:Within the limitations of the present invitro study, the use of lower percentage combinations though produced statistically significant difference in the alloy’s mechanical properties, but was within the required minimum limits except for the 100% recast alloys..
Authors and Affiliations
G. Gomathi, Y. A. Bindhoo, C. Sabarigirinathan, E. Subramaniam
Keywords
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