[Changes in the local immunity indices of the oral cavity in periodontitis patients in relation to the type of metal alloys used for fixed dental prosthesis].

The effects of various metal alloys on the oral fluid levels of IgA, serum IgA and IgG, and IgE of 115 subjects aged 20 to 60 were under study. Mixed salivary IgG levels were measured before and in various periods after fixation of dentures made of different alloys. IgA levels failed to normalize even in a year after fixation of dentures made of steel and titanium nitrite-coated steel, though IgG levels were unchanged in the same patients.