Influence of masticating cycles and chewing patterns on inadvertent enamel wear caused by zirconia brackets
| Autor: | Masashi Miyazaki, Yasuhiro Namura, Ryo Kaetsu, Yasuki Uchida, Mizuki Inaba, Toshiki Takamizawa, Mitsuru Motoyoshi, Akihisa Utsu |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Enamel paint Surface Properties Scanning electron microscope Tooth Attrition Dental Porcelain Grinding stomatognathic system Tooth wear visual_art Materials Testing Surface roughness visual_art.visual_art_medium Animals Mastication Cattle Cubic zirconia Zirconium Composite material Dental Enamel human activities General Dentistry |
| Zdroj: | European Journal of Oral Sciences. 130 |
| ISSN: | 1600-0722 0909-8836 |
| DOI: | 10.1111/eos.12831 |
| Popis: | Little information is available about enamel wear caused by zirconia brackets, an inadvertent side effect of orthodontic treatment. The purpose of this study was to examine potential enamel damage induced by contact with zirconia brackets. Sliding and impact wear simulations were performed using bovine enamel specimens positioned at a 25° slant to a zirconium ball to determine wear behaviour. Different chewing patterns, tapping and grinding, were simulated. Specimens were profiled using confocal laser scanning microscopy, and the mean maximum depth and surface roughness were measured. Scanning electron microscopy was also performed. The mean maximum depth of wear values differed according to the number of mastication cycles, with a higher number of cycles producing higher depths of wear. The facet wear depth was significantly greater with the tapping pattern than with the grinding pattern. Scanning electron microscopic observation of the wear facets revealed that surface textures at the edges were rougher than those at the centre of all facets. The results of this study indicated that enamel wear was induced by contact with zirconia brackets during the early period of mastication, and that the patterns and number of cycles of mastication affected the wear progression of enamel. |
| Databáze: | OpenAIRE |
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