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The fracture behaviour of dental enamel

Paper ID Volume ID Publish Year Pages File Format Full-Text
8639 600 2010 10 PDF Available
Title
The fracture behaviour of dental enamel
Abstract

Enamel is the hardest tissue in the human body covering the crowns of teeth. Whereas the underlying dental material dentin is very well characterized 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 μm crack extension; corresponding mode II values ranged from 0.3 to 1.5 MPa*m1/2.

Keywords
Enamel; Mechanical properties; Fracture behaviour; Resistance curves; Toughening
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The fracture behaviour of dental enamel
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 31, Issue 2, January 2010, Pages 375–384
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us