A load-to-fracture and strain analysis of monolithic zirconia cantilevered frameworks

The Journal of Prosthetic Dentistry
Faris A AlshahraniWilliam Brantley

Abstract

The dimensions of implant-supported fixed cantilevered prostheses are important to prevent mechanical and biological complications. Information on the optimum thickness and cantilever length for improving the strength of zirconia cantilevered frameworks is limited in the literature. The purpose of this in vitro study was to investigate the effect of cantilever length and occlusocervical thickness on the load-to-fracture and strain distribution of zirconia frameworks. Twenty-seven rectangular prism-shaped specimens (6 mm thick buccolingually) were fabricated using a computer-aided design and computer-aided manufacturing (CAD-CAM) milling technique. The specimens were prepared in 9 groups (n=3) according to their vertical dimensions (6×6 mm, 8×6 mm, and 10×6 mm) and cantilever loading distance (7 mm, 10 mm, and 17 mm). All specimens were heat treated in a porcelain furnace and thermocycled for 20000 cycles before the tests. Each framework was secured using a clamp attached to the first 20 mm of the framework. A 3-dimensional image correlation technique was used for a full-field measurement of strain during testing. A load-to-fracture test was used until the specimens fractured. Maximum force and principal strain data were analyze...Continue Reading

Citations

Feb 15, 2021·Dental Materials : Official Publication of the Academy of Dental Materials·Salma M FathyMicheal V Swain
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ibraheem F AlshiddiMohammed Alsarhan

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