全解剖式氧化锆冠牙体预备原则的研究进展

Research status on the principle of tooth preparation of monolithic zirconia crowns

全冠修复是大面积牙体缺损最常用的修复方式。随着材料的发展,氧化锆陶瓷的出现解决了口腔传统全瓷材料强度不足的问题。全解剖式氧化锆冠(以下简称全锆冠)的机械性能比起传统玻璃陶瓷全冠已经有了很大的进步,但在临床应用时仍沿用烤瓷冠或传统全瓷冠的牙体预备原则。已有研究表明,咬合面厚度为0.5 mm的全锆冠可以满足临床需求;但轴面预备量、牙合向聚合度、颈缘形态和宽度等方面相关文献报道有限且结论尚不统一。此外,随着透明氧化锆的快速发展,其牙体预备原则更缺乏统一的标准。因此,该文通过综述全锆冠的牙体预备原则的研究进展,为全锆冠的临床牙体预备提供参考。

Crown has been the most common restoration for large tooth defect. With the development of material industry, the appearance of zirconia has solved the problem of inadequacy in strength of traditional dental ceramics. The mechanical properties of monolithic zirconia crown have progressed significantly compared with traditional ceramic crown. Previous studies have shown that the fracture resistance of the zirconia crowns with occlusal thickness of 0.5 mm can meet the clinical requirements. However, research in axial wall reduction, occlusal convergence, marginal shape and thickness is limited and the conclusions are inconsistent. In addition, with the rapid development of translucent zirconia, its principle of tooth preparation has no unified standard. This paper reviewed the research progress on the tooth preparation of monolithic zirconia crown, aiming to provide references for clinical applications.