Abstract

To regulate the growth of teeth, people are implanted with orthodontic wires made of different materials. These
are exposed to the influence of oral environment, food intake, toothpastes, and mouthwashes. During this process,
the materials may undergo corrosion. Hence, various researchers have made a study on the influence of artificial
saliva (AS) on the corrosion behavior of these alloys. The excellent corrosion resistance to the oral environment
of dental alloys is important for biocompatibility as well as for orthodontic appliance durability. Various types of
metal alloys are being used for the orthodontic treatment, which undergo chemical or electrochemical reaction
with the oral environment. The oral environment is highly aggressive under several situations and leads to
corrosion. This article reviews the effects of fluoride concentration, the pH value and protein content in AS and
the composition of the metal alloys on the corrosion resistance of orthodontic appliances using electrochemical
methods and surface characterization techniques such as scanning electron microscopy and X-ray diffraction.