2004 Fiscal Year Final Research Report Summary
Effect of microstructure on friction wear of dental restorative alloys
| Project/Area Number |
15592086
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Aichi-Gakuin University |
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Principal Investigator |
FUKUI Hisao Aichi gakuin University, School of Dentistry, Professor, 歯学部, 教授 (50090147)
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| Co-Investigator(Kenkyū-buntansha) |
FUKUI Hisao Aichi gakuin University, School of Dentistry, Professor (50090147)
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| Project Period (FY) |
2003 – 2004
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| Keywords | Gold alloy / Ag-Pd-Cu-Au alloy / Frictio wear / Fatigue / Microstructure |
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| Research Abstract |
In oscillatory friction and wear, there exists both fretting and sliding ; however, traditional research conducted in the past have not distinguished between the two. This study examined the friction and wear of several dental alloys with an oscillatory friction and wear testing machine that gauges both frictional force and waveforms, in order to distinguish fretting from sliding. For use in the friction and wear testing machine, flats and riders were constructed from various materials (alloys and cold-sure resin) with varying degrees of hardness. The fretting and sliding tests were conducted with a controlling load of 20N, a vibrating frequency of 2Hz, in various oscillatory amplitudes and in air and Ringer's solution, respectively. The alloys, Ag-Pd-Au alloy (S-12), Type IV gold alloy (PGA-2) and experimental Ti alloy (TNTZ) were used for constructing the flats, and the riders used were made of cold cure resin, stainless steel (SUS304) and the alloys themselves, which came in three different degrees of hardness.
As a result, a critical amplitude was found in each of the respective mates, which served as the boundary between fretting and sliding. Frictional force increased with an increase in vibrational amplitude for all friction mates in both fretting and sliding conditions. Also, wear caused by the cold cure resin rider on dental alloys was slight, but fretting wear between the alloys themselves was heavier and produced cracks. Fretting led to more significant surface damage than did sliding, especially for TNTZ/SUS304 and TNTZ/TNTZ.
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Research Products
(14 results)
