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Modeling of water absorption induced cracks in resin‐based composite supported ceramic layer structures
Author(s) -
Huang Min,
Thompson V. P.,
Rekow E. D.,
Soboyejo W. O.
Publication year - 2008
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30852
Subject(s) - materials science , ceramic , composite material , cracking , absorption of water , composite number , layer (electronics) , stress (linguistics) , epoxy , absorption (acoustics) , polymer , foundation (evidence) , forensic engineering , engineering , philosophy , linguistics , archaeology , history
Cracking patterns in the top ceramic layers of the modeled dental multilayers with polymer foundation are observed when they are immersed in water. This article developed a model to understand this cracking mechanism. When water diffuses into the polymer foundation of dental restorations, the foundation will expand; as a result, the stress will build up in the top ceramic layer because of the bending and stretching. A finite element model based on this mechanism is built to predict the stress build‐up and the slow crack growth in the top ceramic layers during the water absorption. Our simulations show that the stress build‐up by this mechanism is high enough to cause the cracking in the top ceramic layers and the cracking patterns predicted by our model are well consistent with those observed in experiments on glass/epoxy/polymer multilayers. The model is then used to discuss the life prediction of different dental ceramics. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 2008