EFFECT OF PRE-CRYSTALLIZATION ON LITHIUM DISILICATE GLASS-CERAMICS FABRICATED BY DIFFERENT PROCESSES

Phosphorus Research Bulletin Pub Date : 2016-01-01 DOI:10.3363/PRB.31.24

N. Monmaturapoj, A. Srion, Thossapol Chunkiri

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Abstract

SiO2-Li2O-K2O-Al2O3-P2O5 based lithium disilicate glass ceramic was prepared and fabricated into dental crowns. The influence of factors such as pre-crystallization temperature and fabrication technique on the phase formation and morphology of the glass ceramic was investigated. Differential thermal analysis (DTA), X-ray diffraction (XRD), scanning and transmission electron microscopies (SEM and TEM) were performed to determine the thermal properties, the phase formation and microstructure of the samples, respectively. The composition of lithium disilicate glass ceramic could be fabricated into dental crowns through the hot-pressing and CAD/CAM techniques. Similarities in phase formation have been revealed on the dental crown samples after fabrication by both methods. The dental crown samples fabricated by the CAD/CAM technique exhibited significantly finer needle-like crystals of lithium disilicate. The pre-cerammed ingots and fabrication technique have no significant change on the phase formation; however, they play important roles in changing the morphology of the samples in this study. (Received January 01, 2016; Accepted April 30, 2016)

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预结晶对不同工艺制备二硅酸锂微晶玻璃的影响

制备了二氧化硅- li20 - k20 - al2o3 - p2o5基二硅酸锂玻璃陶瓷，并将其制成牙冠。研究了预结晶温度和制备工艺等因素对玻璃陶瓷相形成和形貌的影响。采用差热分析(DTA)、x射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)对样品的热性能、相形成和微观结构进行了表征。采用热压技术和CAD/CAM技术制备了二硅酸锂玻璃陶瓷。两种方法制备后的牙冠样品的相形成具有相似性。通过CAD/CAM技术制备的牙冠样品显示出更细的针状二硅酸锂晶体。预陶锭和制作工艺对相的形成没有明显的影响;然而，在本研究中，它们在改变样品的形态方面起着重要的作用。(2016年1月1日收稿;2016年4月30日录用)

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Phosphorus Research Bulletin

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