Objective: To investigate the prevalence of orthodontic patients with enamel demineralization after fixed orthodontic treatment and risk factors.Methods: Clinical examination and a questionnaire survey were conducted among 202 patients after orthodontic treatment using a simple random-sampling method in the Department of Orthodontics Stomatology Hospital of Wuhan University in June-August 2008.Enamel demineralization was examined by one dentist.Results were compared.Results: Of 202 samples examined,there we...