A novel high-strength lithium disilicate glass-ceramic featuring a highly intertwined microstructure
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- 作者：Saifang Huang<sup>asup><sup> ; sup><sup>bsup><sup> ; sup><sup>saifang.huang@auckland.ac.nz" class="auth_mail" title="E-mail the corresponding authorsup> ; Ying Li<sup>asup> ; Shanghai Wei<sup>asup> ; Zhaohui Huang<sup>bsup> ; Wei Gao<sup>asup> ; Peng Cao<sup>asup><sup> ; sup><sup>p.cao@auckland.ac.nz" class="auth_mail" title="E-mail the corresponding authorsup>
- 关键词：High strength ; Lithium disilicate glass-ceramic ; Crystallization ; Interlocking/intertwined microstructure ; Dental materials
- 刊名：Journal of the European Ceramic Society
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：37
- 期：3
- 页码：1083-1094
- 全文大小：7293 K
文摘
To achieve long-term clinical performance and wider application of glass-ceramic dental restorations, it is urged to enhance the mechanical properties of glass-ceramic materials. In this study, a high-strength lithium disilicate glass-ceramic was developed in a SiO<sub>2sub>–Li<sub>2sub>O–Al<sub>2sub>O<sub>3sub>–MgO–P<sub>2sub>O<sub>5sub>–ZrO<sub>2sub> related glass system, which demonstrates a high flexural strength of 562 ± 107 MPa. In this high-strength glass-ceramic, the microstructure features highly intertwined colonies of lithium disilicate. This novel microstructure effectively contributes to the improvement of flexural strength. The minor crystalline phases (β-quartz, MgAl<sub>2sub>Si<sub>4sub>O<sub>12sub>, and Li<sub>3sub>PO<sub>4sub>) embedded within the Li<sub>2sub>Si<sub>2sub>O<sub>5sub> (LS<sub>2sub>) crystal colonies and residual glass matrix could further strengthen the glass-ceramic. The development process of such a novel microstructure and its possible formation mechanism are proposed. This material could be an excellent candidate for restorative dental applications up to three-unit posterior bridges.