Electrochemical Behavior and Surface Characterization of Two Dental Materials: Glass Ceramic and Zirconia in Artificial
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TECHNICAL ARTICLE—PEER-REVIEWED
Electrochemical Behavior and Surface Characterization of Two Dental Materials: Glass Ceramic and Zirconia in Artificial Saliva Soraya Lakhloufi . Houda Labjar . Youssra El Hamdouni . Ichraq Bouhouche . Najoua Labjar . Abdelouahed Dahrouch . Malika Serghini-Idriissi . Amal El Yamani . Souad El Hajjaji
Submitted: 20 May 2020 ASM International 2020
Abstract Artificial saliva was used as a degradation medium to assess the effect of saliva on the surface condition, microstructure, chemical composition, and degradation behavior of dental materials. This is done using X-ray diffraction, SEM-coupled energy-dispersive spectrometry (EDX) and electrochemical impedance spectroscopy of these ceramics before and after 21 days of immersion in the salivary medium. The aim of this research was to evaluate the degradation of glass ceramics and zirconia after immersion in Ringer’s solution for 7, 14, 21 days at 37 C and pH = 7.3 by XRD, SEM/EDX and their electrochemical behavior by E.I.S. These results indicate that there is a significant effect of artificial saliva on the materials studied; this effect is manifested by degradation either by release or dissolution of certain ionic compounds. It is also important to note that this dissolution could lead to the deposition of layers on the surface of dental materials; this is all the more important depending on the immersion time.
S. Lakhloufi I. Bouhouche N. Labjar (&) CERNE2D, ENSET, Mohammed V University in Rabat, Rabat, Morocco e-mail: [email protected]; [email protected] H. Labjar Y. El Hamdouni M. Serghini-Idriissi S. El Hajjaji CERNE2D, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco A. Dahrouch Institut de Criminalistique de la Gendarmerie Royale, Rabat, Morocco A. El Yamani STIS, M2CS, FMD, Mohammed V University in Rabat, Rabat, Morocco
Keywords Electrochemical behavior Artificial saliva Dental ceramics Glass ceramic Zirconia E.I.S SEM/EDX XRD
Introduction Before anyone considers placing any restorative material inside the oral cavity, the dental materials have to survive different temperatures, chemicals and enzymatic reactions and the most complex pattern of masticatory movements, and it should not cause any allergic and toxic reaction or mutagenic effects [1]. Dental ceramic materials are considered as a special type due to their excellent qualities and properties, chemical durability, wear resistance, excellent compressive strength, biocompatibility esthetics and low friction that can be explained by the hydrophilic nature of ceramics and the fact that it allows good polishing of its surfaces [2–4]. However, a drawback that hinders its use is the brittle nature of ceramics and its susceptibility to fracture in areas of concentrated tension on the surface or inside of its microstructure. Ceramic materials may be crystalline composed of either pure or glass ceramics, partly crystalline or non-crystalline. These dental ceramics are generally known for their non-metallic inorganic
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