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Related Experiment Videos

Fractographic ceramic failure analysis using the replica technique.

Susanne S Scherrer1, Janet B Quinn, George D Quinn

  • 1Department of Prosthodontics-Biomaterials, University of Geneva, School of Dental Medicine, 19, Barthélemy-Menn, 1205 Geneva, Switzerland. susanne.scherrer@medicine.unige.ch

Dental Materials : Official Publication of the Academy of Dental Materials
|February 3, 2007
PubMed
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In vivo replicas effectively capture fractured ceramic surfaces for descriptive fractography, aiding analysis of clinical failures in dental restorations. This technique helps identify crack origins and propagation, crucial for understanding material failure.

Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Fracture Mechanics

Background:

  • Clinical failures of ceramic dental restorations necessitate advanced analytical techniques.
  • Understanding fracture origins and propagation is key to improving material design and longevity.

Purpose of the Study:

  • To evaluate the efficacy of in vivo replicas for descriptive fractography of fractured ceramic surfaces.
  • To demonstrate the application of this technique in analyzing clinical failures of dental restorations.

Main Methods:

  • Examined fractured veneering ceramics from Procera Alumina and In-Ceram Zirconia using gold-coated epoxy replicas.
  • Utilized scanning electron microscopy (SEM) to inspect replicas for fractographic features (hackle, arrest lines).
  • Determined crack propagation direction and origin by analyzing microstructural interactions.

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Main Results:

  • Replicas provided excellent reproduction of fractured ceramic surfaces, revealing fine details.
  • Characteristic fracture features were identifiable, allowing tracing of crack progression to the origin.
  • Minor replica artifacts were noted but did not impede overall analysis.

Conclusions:

  • The replica technique is user-friendly and yields high-quality reproductions of failed ceramic surfaces.
  • Applying replicas before in situ removal preserves fracture evidence, crucial for accurate analysis.
  • This method serves as an introduction to descriptive fractography for analyzing brittle restorative material failures and potential design flaws.