The purpose of this study was 1)To determine the prevalence of pathologic tooth migration of anterior teeth in patients with moderate to severe Periodontitis ,2) To identify the most common form of pathologic tooth migration and 3) Evaluate relationship between pathologic tooth migration of anterior teeth and attachment loss . Prevalence of tooth migration in anterior teeth was studied in a group of 240 patients with moderate to severe Periodontitis before treatment. 34 patients with 56 pairs of migrated and non-migrated teeth were studied further to determine if there is any relationship between pathologic migration and attachment loss. Migrated teeth were compared to control contralateral teeth that did not have migration. The type and severity of migration was recorded for each affected tooth. The types of migration recorded were diastema, extrusion, rotation, facial flaring and drifting in edentulous spaces. Pathologic tooth migration prevalence was 35.41%(85/240).The mean attachment loss of migrated teeth(7.47±1.38) was significantly greater than control teeth (3.78±1.03).Although different types and combination of PMT made it more difficult to identify the most prevalent form of migration, yet most frequent type of migration in our study was facial flaring (53.84%) followed by diastema(42.30%) and extrusion(3.84%).The results of the study confirms clinical impression that periodontal destruction plays a major role in the etiology of pathologic migration.
