Assessing the cutting efficiency of different burs on zirconia substrate
| Autor: | Rick Chu, Alex J. Moule, Mei Ying Ho, Ove A. Peters, Daniel Du |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Surface Properties Scanning electron microscope 0206 medical engineering Test rig 02 engineering and technology engineering.material Dental High-Speed Equipment Carbide 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Tungsten carbide Cubic zirconia General Dentistry Metallurgy Diamond 030206 dentistry 020601 biomedical engineering Substrate (building) chemistry Microscopy Electron Scanning engineering Wireless data acquisition Zirconium |
| Zdroj: | Australian Endodontic Journal. 45:289-297 |
| ISSN: | 1747-4477 1329-1947 |
| DOI: | 10.1111/aej.12350 |
| Popis: | Cutting dental zirconia for endodontic access preparation is difficult. Therefore, this study aimed to determine cutting efficiency of various burs when cutting this material. An air turbine handpiece was used in a customised test rig to cut sintered zirconia specimens, using a conventional blue band diamond, two different zirconia-cutting diamond and a zirconia-cutting tungsten carbide bur. Position and speed of the bur were continuously determined using wireless data acquisition over two successive five-minute runs. Differences in cutting efficiency were statistically analysed. Burs were examined using light and scanning electron microscopy (SEM). All diamond burs cut zirconia more efficiently than the tungsten carbide bur. Overall, all burs showed decreasing cutting efficiency over time. SEM images showed discernible wear and damage to the cutting portion of each bur head. It is concluded that zirconia-cutting burs are advantageous regarding durability, and carbide burs are rather ineffective against carbide substrate. |
| Databáze: | OpenAIRE |
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