陶瓷在口腔修复中的应用

陶瓷修复体质地致密,耐磨,表面光洁,菌斑不易附着,有良好的生物相容性,使用安全,是最常用的口腔修复材料,发展迅速.从材料学角度介绍了口腔修复中不同类型陶瓷的应用及增加陶瓷材料强度的方法,以提高陶瓷修复体的质量,促进全瓷修复体的运用与普及.     

现代教育技术在口腔修复实践教学中的应用

针对近年来口腔修复学课程的实践教学,就如何合理利用现代教育技术提高其教学质量做了分析与思考,提出了实用型口腔修复动态影像课件的简单设计方案,为学生更好地掌握口腔修复知识提供具有参考价值的教学方法,也为适应新时代人才培养的需要奠定坚实的基础。     

Impregnation of glass fibres with polymethylmethacrylate using a powder-coating method

The aim of this study was to evaluate the usefulness of a powder-coating method to impregnate glass fibres with polymethylmethacrylate (PMMA) for dental purposes. The continuous unidirectional E-glass fibres, the surface of which had been treated with precured silane, were powder-coated with spherical PMMA particles. Before the powder-coated prepregs were used, the incorporated PMMA powder was dissolved with methylmethacrylate monomer. The degree of impregnation of the polymerized composite was determined with a scanning electron microscope. The results revealed that the mean degree of impregnation varied from 0.87 to 0.92, being lower in the heat-cured PMMA group (which simulated fabrication of a new denture), and higher in the autopolymerizing group (which simulated the repair of a fractured denture). The means between the two groups did not, however, differ significantly (p=0.249). The results suggest that, even though the method has some shortcomings in terms of dental laboratory technology, the powder-coating method can be used to fabricate or repair acrylic resin-based dentures.