Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.740
Publisher DOI: 10.1016/j.biomaterials.2009.09.050
Title: The fracture behaviour of dental enamel
Language: English
Authors: Bechtle, Sabine 
Habelitz, Stefan 
Klocke, Arndt 
Fett, Theo 
Schneider, Gerold A. 
Keywords: enamel, mechanical properties, fracture behaviour, resistance curves, toughening
Issue Date: Jan-2009
Publisher: Elsevier
Source: Biomaterials 31 (2010), pp. 375-384
Journal or Series Name: Biomaterials 
Abstract (german): Enamel is the hardest tissue in the human body covering the crowns of teeth. Whereas the underlying dental material dentin is very well characterised in terms of mechanical and fracture properties, available data for enamel are quite limited and are apart from the most recent investigation mainly based on indentation studies. Within the current study, stable crack-growth experiments in bovine enamel have been performed, to measure fracture resistance curves for enamel. Single edge notched bending specimens (SENB) prepared out of bovine incisors were tested in 3-point bending and subsequently analysed using optical and environmental scanning electron microscopy. Cracks propagated primarily within the protein-rich rod sheaths and crack propagation occurred under an inclined angle to initial notch direction not only due to enamel rod and hydroxyapatite crystallite orientation but potentially also due to protein shearing. Determined mode I fracture resistance curves ranged from 0,8 – 1,5 MPa*m1/2 at the beginning of crack propagation up to 4,4 MPa*m1/2 at 500 m crack extension; corresponding mode II values ranged from 0,3 to 1,5 MPa*m1/2.
URI: http://tubdok.tub.tuhh.de/handle/11420/742
DOI: 10.15480/882.740
ISSN: 0142-9612
Institute: Keramische Hochleistungswerkstoffe M-9 
Type: (wissenschaftlicher) Artikel
Appears in Collections:Publications (tub.dok)

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