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目前,在口腔修复领域,全瓷冠修复体不仅具有良好的牙周牙体生物相容性,而且可以再现自然牙的颜色,受到牙病患者的青睐,成为研究的热点。其中,氧化锆具有良好的机械性能(断裂韧性、强度、硬度等)、生物相容性和稳定性、美观性、热导性和成形性,能很好地解决常规全瓷冠材料强度和韧性不足等问题[1~9]。据研究报道[10~12],氧化锆陶瓷在受到外力时会通过相变增韧作用(四方相-单斜相)抵消外部张力以延缓裂纹的扩展,使其具有较高的断
At present, in the field of oral rejuvenation, all-ceramic crown prosthesis not only has good periodontal biocompatibility, but also can reproduce the natural tooth color, which is favored by patients with dental diseases and becomes a hot spot of research. Among them, zirconia has good mechanical properties (fracture toughness, strength, hardness, etc.), biocompatibility and stability, aesthetics, thermal conductivity and formability, can be a good solution to the conventional all-ceramic crown material strength and toughness Insufficient issues [1 ~ 9]. According to the study [10-12], zirconia ceramics counteract the external tension through the phase transformation and toughening (tetragonal-monoclinic phase) when the external force is applied to delay the crack growth and make it have a higher breaking