Background: Lichenoid reactions include a group of lesions with different etiology but with common clinical and histological appearance. This study aimed to determine the prevalence of factors associated with oral lichenoid reactions, including dietary influences. This is the first study to evaluate these factors collectively.
Materials and methods: In this descriptive-analytic study, 73 oral lichenoid reaction patients’ files that were confirmed by biopsy and had complete recorded data in patients referred to IAU University and some oral medicine offices in Isfahan city were assessed for predisposing or aggravating factors. The data were analyzed by Chi-squared test and analysis of variance by SPSS 20 (α=0.05)
Results: There were significant relationships between stress (p=0.01), some kinds of toothpaste (Pooneh, Sensodyne) (p=0.04), metal (amalgam filling, PFM crowns and bridge, chrome cobalt dentures) (p<0.001), some drugs (for hypertension, diabetes, hypothyroidism) (p<0.001), some foods (date and spices) (p=0.04) with oral lichenoid reactions.
Conclusion: Amalgam filling, PFM crown and bridge, chrome cobalt dentures and 3 groups of drugs were the most related factors to oral lichenoid reactions but stress, some toothpastes and foods were also related.