A Comparative Electrochemical and Morphological Investigation on the Behavior of NiCr and CoCr Dental Alloys at Various Temperatures

Abstract

The purpose of our study is to compare the behavior of two reprocessed dental alloys (NiCr and CoCr) at different temperatures considering the idea that food and drinks in the oral cavity create various compositions at different pH levels; the novelty is the investigation of temperature effect on corrosion parameters and ion release of dental alloys. Electrochemical stability was studied together with morphology, elemental composition and ions release determination. The results obtained are in good concordance: electrochemistry studies reveal that the corrosion rate is increasing by increasing the temperature. From SEM coupled with EDS, the oxide film formed on the surface of the alloys is stable at low temperatures and a trend to break after 310K. ICP-MS results evidence that in accordance with increasing temperature, the quantities of ions released from the alloys immersed in artificial saliva also increase, though they still remain small, less than 20 ppm.

Transport Properties of Carbohydrates: Towards the Minimization Toxicological Risks of Cobalt and Chromium Ions

“…With the high concern about chromium and cobalt [7,8,13,16], in this study, we intend to investigate the interaction between the following metal ions and saccharides frequently used in the pharmaceutical industry: cyclodextrins and hyaluronic acid. It should be stressed that metal salt solutions were used in previous studies of cytotoxicity of dental alloys, as reported elsewhere [17,18].…”

Comparative Study of Salivary pH, Buffer Capacity, and Flow in Patients with and without Gastroesophageal Reflux Disease

“…The oral cavity has specific and individualized characteristics, with a wide variety of pH, bacterial load, and temperature variation [ 1 , 2 ]. Temperature and pH of the oral cavity and fluids are two significant factors that affect the electrochemical behavior of restorative dental materials used in a correct dental treatment plan [ 3 , 4 ].…”