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- W2364089552 abstract "Objective To study the crack initiation and fracture of porcelain-fused-metal(PFM) crown under monotonic load by means of experimental techniques.Methods Two forms of specimens were prepared.The first was designed as planar specimens with layered porcelain/metal/polymer to identify the fracture mode when subjected to contact loads.The second type specimen was made along the facial-lingual section through central fossa with layered porcelain/metal/dentinlike(composite resin).Sequential images were acquired when specimens were subjected to vertical monotonic contact load at the central fossa.Digital image correlation(DIC) was applied to analyze the displacement field of the stressed specimens and crack initiation and crack growth werer observed.Results Three failure modes were observed from the plane layered specimens,i.e.brittle cone cracking,radial cracking,and plastic yielding area.In specimens made along facial-lingual section,cone cracking was the dominant failure mode.Conclusion This paper serves as a pioneer study on characterizing the fracture mechanism of PFM crown under mastication loads using a newly designed specimen geometry and a non-contacting optical method.A new type of specimen made along the facial-lingual section through central fossa is achieved which allows directly document the displacement field of the layered structure while stressed with imaging techniques.DIC has been applied to analyze the failure modes of PFM crown under monotonic loads." @default.
- W2364089552 created "2016-06-24" @default.
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- W2364089552 date "2007-01-01" @default.
- W2364089552 modified "2023-09-25" @default.
- W2364089552 title "Experimental study on the fracture mode of porcelain-fused-metal crown under mastication loads with digital image correlation" @default.
- W2364089552 hasPublicationYear "2007" @default.
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