Year : 2019

Volume : Volume 10

Issue : Issue 3s

Address for correspondence :
Dr. Prabal Sharma.
prabalsharma.3@gmail.com

Abstract

Background:  The purpose of the study is to determine the amount of internal fit produced by Co-Cr copings fabricated using two different fabrication methods i.e. traditional casting & direct metal laser sintering and compare the values obtained between each fabrication technique and to evaluate if the fabrication technique can produce prosthesis that is within the standards of clinical acceptance of internal fit.  Materials and Methods: 20 metal copings each were fabricated by laser sintering & traditional casting method. The crowns obtained were then cemented on their dedicated working dies using Glass ionomer cement. Internal fit at the buccal, lingual, mesial, and distal areas was measured after the crowns were sectioned longitudinally. Optical microscope was used to measure the internal fit between the working die and the copings. Statistical analysis was done using t-test using Open-epi calculator software.  Results: The values indicate that the marginal gap was less for the copings fabricated using Co-Cr alloy crowns that were fabricated with direct metal laser sintered technique than Co-Cr alloy crowns fabricated with conventional casting technique. Conclusion: The internal fit of Co-Cr alloy crowns fabricated with laser sintered technique was better than Co-Cr alloy crowns fabricated with conventional casting technique Keywords: Direct metal laser sintering, conventional casting, internal fit.