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Age, Dehydration and Fatigue Crack Growth in Dentin by Devendra Bajaj; Naryana Sundaram; Ahmad Nazari; D. Arola is a Engineering article available to read on EtoBox.
What is Age, Dehydration and Fatigue Crack Growth in Dentin about?
A preliminary study of the effects from age and dehydration on fatigue crack growth in human dentin was conducted. Compact tension (CT) fatigue specimens of coronal dentin were prepared from extracted molars and subjected to high cycle fatigue (10 5 oNo10 6 ) under Mode I loading. Young hydrated dentin (mean age 1⁄4 2577 years), old hydrated dentin (mean age 1⁄4 55714 years) and young dehydrated dentin (mean age 1⁄4 2072 years) were examined. Fatigue crack growth rates were quantified according to the Paris Law in terms of the crack growth exponent (m) and coefficient (C). The average fatigue crack growth exponent for the young hydrated dentin (m 1⁄4 13:3 AE 1:1) was significantly less than that for the hydrated old (m 1⁄4 21:6 AE 5:2; po0:003) and dehydrated young dentin (m 1⁄4 18:8 AE 2:8; po0:01). Fatigue cracks in the old dentin underwent initiation at a lower stress intensity range than in young dentin and propagated at as significantly faster rate (over 100 Â ). Differences in the microscopic features of the fracture surfaces from the old and young dentin suggested that particular mechanisms contributing to energy dissipation and crack growth resistance in the young hydrated
Who reads Age, Dehydration and Fatigue Crack Growth in Dentin?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Devendra Bajaj; Naryana Sundaram; Ahmad Nazari; D. Arola
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0142-9612)
- Published
- 2006
- Language
- EN
- Field
- Engineering (Physical Sciences)