Degradation, Fatigue, and Failure of Resin Dental Composite Materials

• Published in: Journal of Dental Research Vol. 87; no. 8; pp. 710 - 719
• Main Author: Drummond, J.L.
• Format: Book Review Journal Article
• Language: English
• Published: United States SAGE Publications 01.08.2008; SAGE PUBLICATIONS, INC
• Subjects: AGING; BIOLOGICAL RECOVERY; BREAKDOWN; COMPOSITE MATERIALS; Composite Resins - chemistry; COMPRESSION; DECAY; Dental Bonding; Dental Restoration Failure; Dental Restoration, Permanent; Dental Stress Analysis; ETHANOL; FAILURES; FATIGUE; FILLERS; FRACTURE PROPERTIES; Humans; INTERFACES; LOADING; MATERIALS; MATERIALS SCIENCE; MECHANICAL PROPERTIES; RESINS; REVIEWS; Stress, Mechanical; Surface Properties; TOMOGRAPHY; WATER; Weight-Bearing; 3D tomography; dental composites; cyclic loading; aging; multi-axial compression
• ISSN: 0022-0345; 1544-0591
• DOI: 10.1177/154405910808700802

The intent of this article is to review the numerous factors that affect the mechanical properties of particle- or fiber-filler-containing indirect dental resin composite materials. The focus will be on the effects of degradation due to aging in different media, mainly water and water and ethanol, cyclic loading, and mixed-mode loading on flexure strength and fracture toughness. Several selected papers will be examined in detail with respect to mixed and cyclic loading, and 3D tomography with multi-axial compression specimens. The main cause of failure, for most dental resin composites, is the breakdown of the resin matrix and/or the interface between the filler and the resin matrix. In clinical studies, it appears that failure in the first 5 years is a restoration issue (technique or material selection); after that time period, failure most often results from secondary decay.