A Comparative Evaluation of Marginal Accuracy of Co–Cr Metal Copings Fabricated Using Traditional Casting Techniques and Metal Laser Sintering

AIMS AND OBJECTIVES: The aim and objective of the study were to determine the amount of marginal discrepancy produced by cobalt–chromium (Co–Cr) copings fabricated using two different fabrication methods, i.e., traditional casting and direct metal laser-sintering (DMLS), 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 marginal discrepancy. MATERIALS AND METHODS: Twenty metal copings each were fabricated by laser sintering and traditional casting method. The marginal gap at the buccal, lingual, mesial, and distal areas was measured using the silicone replica technique. The stereomicroscope and optical microscope were used to measure the marginal discrepancy between the working die and the copings. Statistical analysis was done using a 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. HOW TO CITE THIS ARTICLE: Gautam N, Khajuria RR, Ahmed R, et al. A Comparative Evaluation of Marginal Accuracy of Co–Cr Metal Copings Fabricated Using Traditional Casting Techniques and Metal Laser Sintering. Int J Clin Pediatr Dent 2021;14(1):128–132.