European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
June 2017
Print ISSN:
0965-7452
Electronic ISSN:
2396-8893
Vol:
25
Issue:
2

Marginal Adaptation and Internal Fit of Posterior 3-Unit Zirconia FPDs Fabricated with Different CAD/CAM Systems

The purpose of this study was to compare the accuracy of zirconia FPDs fabricated by different laboratory CAD/CAM system. Thirty-six FPD zirconia frameworks were fabricated on corresponding epoxy resin models that were duplicated from a master model of mandibular second premolar and second molar mounted in an acrylic block to simulate missing first mandibular tooth. Frameworks were divided into groups (n = 12) of three laboratory CAD/CAM systems: Cercon, Amann Girrbach, and Zirkonzahn. For the two factors, system and abutment type, the absolute marginal discrepancy (AMD) was measured before cementation. Internal fit was also determined at three sites after cementation. The data were analyzed statistically (α = 0.05). The effects of system and tooth type were not significant for AMD (p > 0.05). Both factors showed influence on the internal fit of FPDs (p < 0.05). Molars showed larger gaps in axial and occlusal sites (p = 0.001 and p = 0.003), and Cercon led in better occlusal adaptation compared with Amann Girrbach (p = 0.013). The systems tested did not show differences in AMD,
despite different incorporated components. However, internal fit was significantly different between tooth type and system.

Keywords
CAD/CAM System
Marginal Adaptation
Internal Fit
Zirconia FPD

doi: 10.1922/EJPRD_01624Memarian07

Article Price
£15.00
Institution Article Price
£
Page Start
79
Page End
85
Authors
Dr Maryam Memarian, Dr Leyla Sadighpour, Dr Rojman Nosratpour, Dr Mohammad Javad Kharazi Fard

Articles from this issue

  • Title
  • Pg. Start
  • Pg. End

  1. An Update on the Protocols and Biologic Actions of Platelet Rich Fibrin in Dentistry
  2. 64
  3. 72

  1. Additive Manufacturing: A Novel Method for Fabricating Cobalt-Chromium Removable Partial Denture Frameworks
  2. 73
  3. 78

  1. Marginal Adaptation and Internal Fit of Posterior 3-Unit Zirconia FPDs Fabricated with Different CAD/CAM Systems
  2. 79
  3. 85

  1. Optical Properties and Failure Load of Thin CAD/CAM Ceramic Veneers
  2. 86
  3. 92

  1. The Early Erosive and Abrasive Challenge: A Profilometric, Electron Microscopic and Microhardness Study Using Human, Bovine and Ovine Enamel
  2. 93
  3. 100

  1. Efficacy of Removable Partial Denture Treatment: A Retrospective Oral Health Related Quality of Life Evaluation
  2. 101
  3. 107

  1. Five Year Clinical Evaluation of Restorations Placed in a Low Shrinkage Stress Composite in UK General Dental Practices
  2. 108
  3. 114