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Crush Absorbing Energy of White Spot Lesion Measured by Indentation Tests

Published online by Cambridge University Press:  26 February 2011

Alison M. Fallgatter ,
Ching-Chang Ko  and
C-H Chou
Alison M. Fallgatter
Affiliation:
[email protected], University of Minnesota, Developmental and Surgical Sciences, United States
Ching-Chang Ko
Affiliation:
[email protected], University of Minnesota, Diagnostic and Biological Sciences, United States
C-H Chou
Affiliation:
[email protected], Foxconn Electronics, Inc. 1688 Richard Avenue, Santa Clara, CA 95050
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Abstract

White spot lesions are clinically detectable areas of demineralized enamel that often form during orthodontic treatment. Fluoride has been shown to prevent demineralization from occurring. Mechanical properties of white spot lesions are not well characterized. Bovine enamel slabs, with and without fluoride treatment, were placed under demineralization conditions. Through a series of microindentations at incremental loads, mechanical strength was measured using a novel method, SVAE. Specific Volume Absorbing Energy (SVAE) is equal to work energy divided by the indentation volume. The supra-surface area (outmost 5 μm) of enamel slabs with fluoride demonstrated decreased mechanical strength compared to those without fluoride. Fluoride may not impart protection over long periods of demineralization.

Keywords

tissuestrengthbiomedical
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 898: Symposium L – Mechanical Behavior of Biological and Biomimetic Materials , 2005 , 0898-L04-03-BB01-03
Copyright
Copyright © Materials Research Society 2006

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