Dental injuries, especially those in the frontal area, through the complications they can cause, are an important topic due to the psychosocial impact they have on young patients. Saliva is an important biological resource, useful for conducting diagnostic tests; also, it can be harvested non-invasively, without the need for prior training or special equipment. The biochemical analysis of the concentration of salivary parameters may suggest the susceptibility and resistance to carious lesions. The aim of the present study is to evaluate a causal relationship between the values of salivary parameters, salivary calcium, phosphates and salivary pH, and the incidence of dental caries.