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
Related Articles
- EP ID EP377162
- DOI 10.9790/0853-1707023438.
- Views 59
- Downloads 0
A Case of Emphysematous Pyelonephritis With Septic Shock
Emphysematous pyelonephritis is a severe, necrotizing renal parenchymal infection that is characterized by the production of intraparenchymal gas. In this case, patient was found to be diabetes mellitus, depressive illne...
The Effect of Black Cumin (Nigella Sativa) Extract to Tensile Strength through Decreasing Oxidative Stress (MDA) on Artificial Achilles Tendon of Diabetes Mellitus Type 2 Wistar Rat
Achilles tendon rupture is a condition when the Achilles tendon is injured or torn.It has been reported that the incidence of Achilles tendon rupture in patients with diabetes mellitus was 2.35 per 1000 population per ye...
Reattachment of Fractured Anterior Tooth: A Case Report
Coronal tooth fracture, especially in maxillary anterior teeth are mostly common in children and adolescents but can occur in any age group. Trauma to maxillary anterior teeth affects the patient both socially and psycho...
Effects of Spinal Versus Intravenous Clonidine on Prolongation of Spinal Anaesthesia in Patients Undergoing LSCS
The objective of the study was to evaluate the effect of intrathecal and intravenousclonidine on the duration of subarachnoid block in patients undergoing caesareansections under spinal anaesthesia. 63 patients undergoin...
Age Estimation Using Pulp/ Tooth Volume Ratio By Cone Beam Computed Tomography
The formation of secondary dentin leads to an age related decrease in the pulp cavity. Hence the pulp volume can be useful for age estimation using the three-dimensional processing of the radiographic images of the teeth...