Action of a Cleaning Agent on Saliva Contaminated Zirconia: Study by Nuclear Magnetic Resonance Spectroscopy and Energy Dispersive X-ray Microanalysis

Objectives:The first condition to obtain a long-lasting bond of the surface of a zirconia prosthesis is a surface free of contaminants. Many methods used chemical or mechanical procedures are proposed to decontaminate zirconia surfaces. The purpose of this study is to investigate the action of a Chemical Product as a cleaning method for dental zirconia ceramic contaminated by saliva. Methods: Molecular structures of a Chemical Product and saliva are first determined. After having contaminated the zirconia with artificial saliva, the contaminated zirconia is coated with Ivoclean and rinsed in an appropriate way, there will be analyses of the surface condition of the zirconia. Liquid-phase nuclear magnetic resonance (NMR) spectroscopy and energy dispersive X-ray spectrometry (SEM/EDX) were performed to examined the interaction between artificial saliva and zirconia with and without a Chemical Product. Results: Phosphorus NMR analyses on samples of a mixture of saliva and Ivoclean clearly demonstrated the affinity of saliva phosphate groups with a Chemical Product. In the presence of zirconia, phosphorus NMR analyses of the rinse solution with and without Ivoclean also showed that saliva phosphates had a much greater affinity with Ivoclean than with saliva. In the presence of Ivoclean, saliva phosphates bound to zirconia are stripped off and complex with Ivoclean Significance: There is an interaction between a Chemical Product and saliva. The phosphorus contain in saliva are capted with a cleaning decontaminant effect allowing a long-lasting bond to zirconia surfaces.