The goal of this article is to establish the influence of methionine - an important amino acid from human body which exists in different aliments - on the oxidant character of artificial saliva in the presence of a titanium alloy implant. As titanium alloy was proposed Ti6Al4 V with a surface passivated using anodization or treated in acids. As simulated artificial saliva were used well known composition Afnor and Carter-Brugirard solutions.