The influence of specimen attachment and dimension on microtensile strength
| Autor: | N. de Jager, Albert J. Feilzer, L.J. van Ruijven, A.A. El Zohairy, A.J. de Gee |
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| Přispěvatelé: | Tandheelkundige Materiaalwetenschappen (OUD, ACTA), Functionele_Anatomie (OUD, ACTA) |
| Rok vydání: | 2004 |
| Předmět: |
0301 basic medicine
Materials science Surface Properties Composite number Finite Element Analysis Dental bonding Composite Resins Stress (mechanics) 03 medical and health sciences Dental Materials 0302 clinical medicine Tensile Strength Ultimate tensile strength Materials Testing Humans Elasticity (economics) Composite material General Dentistry Sectional area Analysis of Variance Bond strength Dental Bonding 030206 dentistry Elasticity 030104 developmental biology Fracture (geology) Stress Mechanical |
| Zdroj: | Journal of Dental Research, 83, 420-424. SAGE Publications Inc. El-Zohairy, A A, de Gee, A J, de Jager, N, van Ruijven, L J & Feilzer, A J 2004, ' The influence of specimen attachment and dimension on microtensile strength ', Journal of Dental Research, vol. 83, pp. 420-424 . https://doi.org/10.1177/154405910408300513 |
| ISSN: | 0022-0345 |
| Popis: | The higher microtensile bond strength values found for specimens with a smaller cross-sectional area are often explained by the lower occurrence of internal defects and surface flaws. We hypothesized that this aberrant behavior is mainly caused by the lateral way of attachment of the specimens to the testing device, which makes the strength dependent on the thickness. This study showed that composite bars of 1×1×10, 1×2×10, and 1×3×10mm attached at their 1-mm-wide side (situation A) fractured at loads of the same magnitude, as a result of which the microtensile strength (μTS), calculated as F/A (force at fracture/cross-sectional area), significantly increased for specimens with decreasing thickness. Attachment at the 1-, 2-, or 3-mm-wide side (situation B) resulted in equal μTS values (P > 0.05). Finite element analysis showed different stress patterns for situation A, but comparable patterns for situation B. Both situations showed the same maximum stress at fracture. |
| Databáze: | OpenAIRE |
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