| Autor: |
Collys, Kristiaan, Slop, Dick, Cleymaet, Roberto, Coomans, Danny, Michotte, Yvette |
| Přispěvatelé: |
Biomedical Statistics and Informatics, Pharmaceutical Chemistry, Drug Analysis and Drug Information, Conservative Dentistry and Prosthodontics, Vrije Universiteit Brussel |
| Jazyk: |
angličtina |
| Rok vydání: |
1992 |
| Předmět: |
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| Popis: |
The load dependency of hardness measurements was investigated on sound and demineralized enamel samples. For all samples investigated, the Knoop hardness number (KHN) varied as a function of the applied load. Higher loads enhanced indenter penetration into the test surface. The variation in KHN values observed in demineralized enamel, both surface-softened and surface-etched, was explained by a decrease in porosity as a function of depth. The reading error for indentations made on surface enamel etched with 37% phosphoric acid gel for 30 s was found to be slightly elevated compared to indentations made on a polished sound enamel surface. It was concluded that the surface microhardness technique can be used for the longitudinal investigation of etched surface enamel. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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