Fractographic Analysis of a Dental Zirconia Framework: a Case Study on Design Issues

Overview

Journal J Mech Behav Biomed Mater

Publisher Elsevier

Specialty Biomedical Engineering

Date 2010 Sep 10

PMID 20826369

Citations 7

Authors

Ulrich Lohbauer

Gudrun Amberger

George D Quinn

Susanne S Scherrer

Affiliations

Soon will be listed here.

Abstract

Fractographic analysis of clinically failed dental ceramics can provide insights as to the failure origin and related mechanisms. One anterior 6-unit all-ceramic zirconia fixed partial denture (FPD) (Cercon) has been clinically recovered and examined using qualitative fractography. The purpose was to identify the fracture origin and to state the reasons for failure. The recovered parts of the zirconia FPD were microscopically examined to identify classic fractographic patterns such as arrest lines, hackle, twist hackle and wake hackle. The direction of crack propagation was mapped and interpreted back to the origin of failure at the interface of the occlusal-palatal tip of the core and the veneering ceramic. An inappropriate core drop design favoring localized stress concentration combined with a pore cluster in the veneering ceramic at the core tip interface were the reasons for this premature through-the-core thickness failure.

Citing Articles

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Fracture resistance of three-unit zirconia fixed partial denture with modified framework.

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