European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
March 2019
Print ISSN:
0965-7452
Electronic ISSN:
2396-8893
Vol:
27
Issue:
1

Evaluation of the Internal and Marginal Discrepancies of Co-Cr Metal Copings Prepared via CAD/CAM and Conventional Casting

doi: 10.1922/EJPRD_01865Dayan06

The aim of this study was to assess the internal and marginal discrepancies of chromium-cobalt (Co/Cr) copings fabricated using different techniques. A typodont molar
tooth was prepared and replicated in die stone and scanned. Forty Co-Cr alloy copings
were produced using four different production techniques: conventional casting (Cgroup), direct metal laser sintering (DMLS-group), micro-stereolithography/casting
combination (µSLA-group), and computer-aided milling (M-group) (n = 10). The internal
and marginal discrepancies at various reference points were determined via digital microscopy. Analysis of variance (ANOVA) and Tukey’s multiple comparisons tests were
used for statistical analysis (p=0.05). The marginal and cervical discrepancies of the
C-group were similar to those of the M-group (p>0.05) and better than those of the
µSLA-group (p<0.05). The marginal and internal discrepancies of all groups were within
clinically acceptable limits, but further improvements in the µSLA and DMLS techniques
may be required prior to clinical implementation.

Keywords
Computer-Aided Design
Alloys
Computer-Aided Manufacture
Marginal Discrepancy
Internal Discrepancy


Copyright ©2019 by Dennis Barber Ltd. All rights reserved.

Article Price
£15.00
Institution Article Price
£
Page Start
26
Page End
31
Authors
Dr. Suleyman Cagatay Dayan, Dr. Burim Kiseri, Dr. Burc Gencel, Dr. Aysegul Kurt

Articles from this issue

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  1. The Effects of Colored Pigments on the Translucency of Experimental Dental Resin Composites
  2. 3
  3. 9

  1. Evaluation of Monomer Leaching from a Resin Cement Through Dentin
  2. 10
  3. 17

  1. Fit Accuracy of Pressed and Milled Lithium Disilicate Inlays Fabricated From Conventional Impressions or a Laboratory-Based Digital Workflow
  2. 18
  3. 25

  1. Evaluation of the Internal and Marginal Discrepancies of Co-Cr Metal Copings Prepared via CAD/CAM and Conventional Casting
  2. 26
  3. 31

  1. Adequately Prepared? A Study Using an Innovative Computer Application to Measure Clinical Crown Convergence Angles Achieved by Students at a UK Dental School
  2. 32
  3. 38

  1. Clinical Performance of Nanofilled and Microhybrid Direct Composite Restorations on Endodontically Treated Teeth
  2. 39
  3. 47