Behr, Michael and Rosentritt, Martin and Faltermeier, Andreas and Handel, Gerhard (2005) Electron beam irradiation of denture base materials. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE, 16 (2). pp. 175-181. ISSN 0957-4530,
Full text not available from this repository. (Request a copy)Abstract
Electron beam irradiation can be used to influence the properties of polymers. It was the aim of this study to investigate whether PMMA denture base materials can benefit from irradiation in order to have increased fracture toughness, work of fracture or hardness. Rectangular specimens of heat-and auto-curing denture base materials were electron beam irradiated (post-cured) with 25, 100 and 200 kGy using an electron acceleration of 10 MeV or 4.5 MeV respectively. Fracture toughness, work of fracture, Vickers hardness and colour changes were measured and compared with not-irradiated specimens. The toughness, work of fracture and hardness increased using 10 MeV with a dose of 25 kGy and with 100 kGy using 4.5 MeV. However, the clinical use may not benefit from the observed small changes. Higher dosage (200 kGy) decreased the values significantly. The colour changes reached a level which was found to be not clinically acceptable. Conclusion: PMMA denture base materials do not benefit from post-curing with electron beam irradiation. (C) 2005 Springer Science + Business Media, Inc.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RADIATION; |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 May 2021 05:56 |
| Last Modified: | 31 May 2021 05:56 |
| URI: | https://pred.uni-regensburg.de/id/eprint/36533 |
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