Assessment of porosity of glass-ionomer cement using ultrasonic waves Online publication date: Wed, 06-Jun-2018
by Touriya Bassidi; Lahcen Mountassir; Hassan Nounah; Khalid Bouabid
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 12, No. 5/6, 2017
Abstract: The degradation of dental restoration with glass ionomer cement is generally caused by the penetration of aggressive agents through the pores. Therefore the porosity is an essential parameter in the degradation process and an indicator of the durability of this restoration. The objective of this study was to investigate the relationship between porosity and ultrasonic parameters of glass-ionomer dental cement. Theoretical Schoch model describing the ultrasonic propagation in materials was proposed. Ultrasonic velocities and mechanical properties were evaluated. They were then, compared to the experimental ultrasonic parameters measured on dry and saturated samples with varying porosity. As expected, a linear decrease of ultrasonic velocities vs. porosity is observed for two saturation states. The correlation between theoretical and measured results is analysed. The Schoch model succeeded in describing the acoustic parameters in dry and saturated state.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Microstructure and Materials Properties (IJMMP):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook