金瓷修复体强度测试实验方法的探讨

Intensity testing experimental methods in metal-porcelain restoration

背景:口腔金瓷修复体是用合金先制成金属基底,再在其表面覆盖与天然牙颜色相似的低熔瓷粉,在真空烤瓷炉中烧结熔附而成。因烤瓷熔附金属全冠兼有金属全冠的强度和瓷全冠的美观,已广泛应用于临床。口腔金瓷修复体力学性能实验有利于解决金瓷修复体在临床应用中出现的力学问题,提高修复体的成功率。根据具体研究目的不同,实验室里对金瓷修复体的力学加载装置设计也就不尽相同。目的:多种实验方法应用于金瓷强度力学测试中,研究不同加载方式和不同实验方法对金瓷试件强度评估,并为进一步的金瓷修复体力学性能研究提供实验方法和参考。方法:检索SpringerLink数据库,检索关键词"metal-porcelain restoration",检索维普数据库,检索关键词"金瓷修复体",阅读相关文章,选择关于金瓷修复体研究实验方法方面的文献。初检120篇文献,阅读文题和摘要排除89篇相关性不强文献。最后对31篇进行归纳和总结。结果与结论:对国内外金瓷修复体弯曲力学测试的实验加载方式及实验方法进行了论述和探讨,对金瓷修复体的三点弯曲和四点弯曲加载方式进行了实验测试并进行了概述,重点探讨了云纹干涉法和电子散斑干涉法的实验方法并分别对不同金瓷厚度的修复体进行力学性能实验测试,测试的灵敏度分别为0.417μm和0.532μm,在灵敏度方面目前能够满足口腔修复领域的研究需要。

BACKGROUND：Porcelain-fused-metal restoration（PFM）is made by substrate material of alloy,and then porcelain which color is similar to the natural tooth is covered on the metal.At last,the composite of porcelian-metal is sintered in vaccum furnace.Because PFM has the strength of full crown metal and aethetic of full crown porcelain,it is widely applied in the oral clinic.Mechanical property of Porcelain-fused-metal restoration（PFM）contributes to solve mechanical problems occurred in clinic and to elevate success rate of the restoration.In accordance to different objectives,the design of PFM mechanical charger is various in the laboratory.OBJECTIVE：To discuss different experimental methods applied in studying strength of PFM,so that several experimental methods are supplied for further studying behaviors of PFM.METHODS：SpringerLink database and Vip database were retrieved using the of key words＂metal-porcelain restoration＂to select studies concerning the mechanical behaviors of PFM following reading.120 literatures were obtained following primary retrieval.Following reading titles and abstracts,89 unrelated literatures were excluded.Finally,31 literatures were used for summary and review.RESULTS AND CONCLUSION：Index system of foreign and domestic are adopted associated with the methods in studying the mechanical behaviors of PFM.Literatures are mainly adopted three-point and four-point bending.Moiréinterferometry and speckle interferometry are used in various thickness of dental prosthetic restoration for mechanical property test,with the sensitivity of 0.417μm and 0.532μm,respectively.The sensitivity meets the requirements of mouth rehabilitation at present.