Intensity testing experimental methods in metal-porcelain restoration / 中国组织工程研究

ABSTRACT

BACKGROUND: Porcelain-fused-metal restoration (PFM) is made by substrata 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 key words of "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. Moiré interferometry and speckle interferometry are used in various thickness of dental prosthetic restoration for mechanical property test, with the sensitivity of 0.417 μm and 0.532 μm, respectively. The sensitivity meets the requirements of mouth rehabilitation at present.