European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
March 2013
Print ISSN:
0965-7452
Vol:
21
Issue:
1

Evaluation and Comparison of the Internal Fit and Marginal Accuracy of Base Metal (Nickelchromium) and Zirconia Copings Before and after Ceramic Veneering: A Sem Study

doi:10.1922/EJPRD_1152Regish05

Abstract - This study compares the internal fit and marginal adaptation of copy milled Zirconia copings with NickelChromium (Ni-Cr) copings fabricated using a lost wax technique before and after ceramic veneering. A standardized metal master die simulating a prepared crown was fabricated and twenty impressions of the metal die were made and poured with die stone. Wax patterns were made on ten dies and cast while light cure resin patterns were made on the other ten dies for copy milling the Zirconia copings. Five specimens from each group were subjected to ceramic veneering. All the test specimens were luted on to the fresh dies, embedded in dental plaster, sectioned and image analysis done using scanning electron microscopy. Thereafter statistical analysis is done using student t-test. The linear measurements for internal fit and marginal discrepancy were increased for Zirconia compared with Ni-Cr copings. The difference in the values of all the specimens of all the groups were not statistically significant (P>0.05) except the values comparing the internal fit of Zirconia and Ni-Cr copings before ceramic veneering (P<0.001) which was statistically significant. The internal fit and marginal adaptability of Ni-Cr copings were found to be better than the Copy milled Zirconia copings but internal fit and marginal adaptability deteriorated after ceramic veneering.

KEYWORDS: Zirconia, Zirconia crowns, Marginal adaptability, Internal fit, Ceramic veneering.

Article Price
£15.00
Institution Article Price
£
Page Start
44
Page End
48
Authors
K.M. Regish, D. Sharma, D.R. Prithviraj, A. Nair, R. Raghavan

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  1. A Simple Method to Fabricate Stabilized Record Bases: A Modified Approach Using Casting Wax for the Borders
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  1. Effect of Artificial Saliva and pH on Shear Bond Strength of Resin Cements to Zirconia-Based Ceramic
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  1. Digital Data Management for CAD/CAM Technology. An Update of Current Systems
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  1. Unilateral Bounded Saddles: A Clinical Case Report on the use of a Two Part Sectional Removable Partial Denture
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  1. A Preliminary Evaluation into the Performance of Posterior Resin Bonded Cast Metal Restorations (Adhesive Onlays)
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  1. A Study to Evaluate the Prevalence of Golden Proportion and RED Proportion in Aesthetically Pleasing Smiles
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  1. The Effect of Laser Irradiation on Retention of Full Cast Crowns
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  1. Provision of an Appliance to Correct Mandibular Deviation Secondary to Temporomandibular Joint Replacement
  2. 40
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  1. Evaluation and Comparison of the Internal Fit and Marginal Accuracy of Base Metal (Nickelchromium) and Zirconia Copings Before and after Ceramic Veneering: A Sem Study
  2. 44
  3. 48