European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
September 2016
Print ISSN:
0965-7452
Electronic ISSN:
2396-8893
Vol:
24
Issue:
3

Marginal Adaptation, Gap Width, and Fracture Strength of Teeth Restored With Different All-Ceramic Vs Metal Ceramic Crown Systems: An in Vitro Study

ABSTRACT
This study evaluated marginal adaptation before and after thermomechanical (TCML) loading, gap width and fracture strength of all-ceramic single crowns, as compared to porcelain-fused-to-metal (PFM). Thirty extracted premolars were prepared with a round shoulder of 1.0 mm depth. Specimens were restored with zirconia–ceramic (Group 1),
lithium disilicate (Group 2) and metal–ceramic single crowns (Group 3). The replica of each sample was observed with a scanning electron microscope (SEM) to evaluate the crown–cement (c–c) and tooth–cement interface (t–c). After TCML, perfect margins decreased to 91.3% (c–c) and 93.9% (t–c) in Group 1, 94.6% (c–c) and 96.0% (t–c) in Group 2 and 73.5% (c–c) and 53.1% (t–c) in Group 3. The mean fracture strengths were 654.8 ± 98.1 N for Group 1, 551.3 ± 127 N for Group 2 and 501.43 ± 110.1 N for Group 3. All-ceramic systems could substitute for metal–ceramic crowns, but chipping of veneering ceramics, especially in zirconia-based crowns, should be investigated.

Keywords
Zirconia
Fracture Strength
Lithium Disilicate
CAD/CAM System
Marginal Adaptation
All-Ceramic System

doi: 10.1922/EJPRD_01550Monaco08

Article Price
£15.00
Institution Article Price
£
Page Start
130
Page End
137
Authors
Prof. Carlo Monaco, Martin Rosentritt, Altin Llukacej, Prof. Paolo Baldissara, Roberto Scotti

Articles from this issue

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  • Pg. Start
  • Pg. End

  1. ‘Own-Label’ Versus Branded Commercial Dental Resin Composite Materials: Mechanical And Physical Property Comparisons
  2. 122
  3. 129

  1. Marginal Adaptation, Gap Width, and Fracture Strength of Teeth Restored With Different All-Ceramic Vs Metal Ceramic Crown Systems: An in Vitro Study
  2. 130
  3. 137

  1. Effects of Different Porcelains and Shades on Light Transmission and Resin Polymerization
  2. 138
  3. 144

  1. Anti-Inflammatory and Regenerative Effects of Albanian Propolis in Experimental Vital Amputations
  2. 145
  3. 151

  1. A Practice-Based Clinical Evaluation of a Bulk Fill Restorative Material
  2. 152
  3. 157

  1. A Survey on Prevalence, Causes and Prevention of Postcementation Hypersensitivity
  2. 158
  3. 163

  1. Fracture of Zirconia Abutment with Metallic Insertion on Anterior Single Titanium Implant with Internal Hexagon: Retrieval Analysis of a Failure
  2. 164
  3. 168