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Related Concept Videos

Veneer01:19

Veneer

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Veneer refers to a thin sheet of wood, typically produced to a thickness of about one-eighth of an inch or less. This material is crafted through various methods, the most common being rotary cutting. In this process, a log is mounted into a large lathe and spun against a knife edge, peeling off a continuous strip of wood as the knife penetrates deeper into the rotating log, creating a rotary-cut veneer.
Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...
280

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Related Experiment Video

Updated: Dec 22, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
07:42

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

646

In Vitro Static and Fatigue Behavior of Ceramic Occlusal Veneers Using CAD/CAM.

N Al-Haj Husain1, S Sonderegger2, M Özcan1

  • 1University of Zurich.

The European Journal of Prosthodontics and Restorative Dentistry
|May 5, 2020
PubMed
Summary
This summary is machine-generated.

Lithium disilicate-strengthened aluminosilicate glass-ceramic (LDS) showed lower fracture resistance compared to other materials. However, its mechanical properties after aging suggest potential for clinical use in dental restorations.

Keywords:
CAD/CAMFracture ResistanceLithium DisilicateMechanical LoadingOcclusal VeneersZirconia

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Ceramic Engineering

Background:

  • Occlusal veneers are crucial dental restorations.
  • Evaluating the fracture resistance of CAD/CAM materials is essential for clinical success.
  • Fatigue testing simulates intraoral conditions to assess material durability.

Purpose of the Study:

  • To compare the fracture resistance of occlusal veneers made from different glass-ceramic and zirconia materials.
  • To investigate the effect of fatigue on the fracture resistance of these dental ceramics.
  • To determine the suitability of lithium disilicate-strengthened aluminosilicate glass-ceramic for restorative applications.

Main Methods:

  • Eighty occlusal overlays (10 per group) were fabricated from four CAD/CAM materials: Lithium disilicate (LD), Lithium-disilicate-strengthened aluminosilicate glass-ceramic (LDS), Zirconium dioxide ceramic (ZLT), and Zirconium dioxide ceramic (ZMT).
  • Specimens were subjected to aging or non-aging conditions and loaded until fracture to determine initial crack formation load (Finitial) and ultimate catastrophic failure strength (Fmax).
  • Data were analyzed using two-way ANOVA.

Main Results:

  • Material type and aging significantly affected initial crack formation load (Finitial).
  • Lithium disilicate-strengthened aluminosilicate glass-ceramic (LDS) exhibited the lowest Finitial values, while Zirconium dioxide ceramic (ZMT) showed the highest.
  • Material type significantly influenced ultimate catastrophic failure strength (Fmax), but aging did not.
  • Lithium disilicate glass-ceramic (LD) and Zirconium dioxide ceramics (ZLT, ZMT) demonstrated higher Fmax values than LDS, both with and without aging.

Conclusions:

  • Lithium disilicate-strengthened aluminosilicate glass-ceramic (LDS) showed significantly lower fracture resistance compared to other tested materials, particularly in its non-aged state.
  • Despite lower initial strength, LDS demonstrated non-significant less favorable results with aging, indicating potential for clinical application.
  • The study highlights the importance of material selection and fatigue considerations in the design of occlusal veneers.