Abstract :

  Background and Aim: Lichen Planus is a chronic mucocutaneus diseasefor which many etiologic factors have been introduced including dental amalgam restorations. The purpose of this study is to assess the relationship between amalgam restoration and oral LichenPlanus.

  Materials and Methods : In this case-control study 40patients with oral Lichen Planus presenting to dental faculties were selected as the case group and 44 healthy people without Lichen Planus presented to this center were selected as the control group. Case and control groups were examined and evaluated according to the number of amalgam restorations and the total number of amalgam surfaces. The relationship between amalgam restorations and oral Lichen Planus was analyzed with Mann- U- Whitney test.

  Results : The average number of amalgam restorations in the case and control group s were 3.71 ±3. 12 and 3.16 ± 2.74 respectively and t he average number of total amalgam surfaces in the case and control group s were 5.62 ±6.96 and 4.53±4.07 . respectively there was not any significant difference between two groups. (p=0.5),(p=0.1).

  Conclusion : there is no relationship between the number of amalgam restorations and total number of amalgam surfaces with oral Lichen Planus.