Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/43579
標題: Effect of Streptococcus mutans on mechanical properties of human dental structures
作者: Chang, S.Y.
張守一
Chung, R.J.
Chou, F.C.
Hsiao, H.L.
Hsu, H.B.
關鍵字: hydrogen-peroxide
human enamel
in-vitro
intertubular dentin
nanometer-scale
soft drinks
nanoindentation
hardness
microhardness
behavior
期刊/報告no:: Journal of Materials Research, Volume 24, Issue 7, Page(s) 2301-2306.
摘要: In this Study, the mechanical properties of human dental structures have been investigated by using instrumented nanoindentation. Immersion in solutions containing Streptococcus mutans, which is the principal cause of dental caries, was applied to tooth specimens to clarify its effect oil the microstructure and mechanical properties of the dental Structures. With in extended time of up to 16 h, the pH value of the S. mutans Solutions dropped front 7.3 to 5.8. Therefore, after immersion in the S. mutans solutions for 16 h. slight erosions of the dental structures began, after 64 It, severe tooth decay Occurred with obviously etched dental features. After 129 h. the elastic modulus of enamel and dentine dropped to 85 and 67%, respectively, of the original Values Of untreated specimens, and the hardness dropped to 88 and 55%, respectively.
URI: http://hdl.handle.net/11455/43579
ISSN: 0884-2914
文章連結: http://dx.doi.org/10.1557/jmr.2009.0275
Appears in Collections:材料科學與工程學系

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