Scientific article
Open access

Fractographic ceramic failure analysis using the replica technique

Published inDental materials, vol. 23, no. 11, p. 1397-1404
Publication date2007-11

Objectives. To demonstrate the effectiveness of in vivo replicas of fractured ceramic surfaces for descriptive fractography as applied to the analysis of clinical failures. Methods. The fracture surface topography of partially failed veneering ceramic of a Procera Alumina molar and an In-Ceram Zirconia premolar were examined utilizing gold-coated epoxy poured replicas viewed using scanning electron microscopy. The replicas were inspected for fractographic features such as hackle, wake hackle, twist hackle, compression curl and arrest lines for determination of the direction of crack propagation and location of the origin.

Results. For both veneering ceramics, replicas provided an excellent reproduction of the fractured surfaces. Fine details including all characteristic fracture features produced by the interaction of the advancing crack with the material’s microstructure could be recognized. The observed features are indicators of the local direction of crack propagation and were used to trace the crack’s progression back to its initial starting zone (the origin). Drawbacks of replicas such as artifacts (air bubbles) or imperfections resulting from inadequate epoxy pouring were noted but not critical for the overall analysis of the fractured surfaces.

Significance. The replica technique proved to be easy to use and allowed an excellent reproduction of failed ceramic surfaces. It should be applied before attempting to remove any failed part remaining in situ as the fracture surface may be damaged during this procedure. These two case studies are intended as an introduction for the clinical researcher in using qualitative (descriptive) fractography as a tool for understanding fracture processes in brittle restorative materials and, secondarily, to draw conclusions as to possible design inadequacies in failed restorations.

Citation (ISO format)
SCHERRER, Susanne et al. Fractographic ceramic failure analysis using the replica technique. In: Dental materials, 2007, vol. 23, n° 11, p. 1397–1404. doi: 10.1016/j.dental.2006.12.002
Main files (2)
Article (Accepted version)
Article (Published version)
ISSN of the journal0109-5641

Technical informations

Creation11/01/2022 7:45:00 AM
First validation11/01/2022 7:45:00 AM
Update time03/16/2023 8:37:55 AM
Status update03/16/2023 8:37:54 AM
Last indexation01/17/2024 10:01:23 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack