本文对衡阳市453例口腔科门诊病人和体检者进行口腔毛滴虫检查，检出口腔毛滴虫者150人，阳性率为33．1％；口腔健康组为18．4％；有口腔疾病患组为40.1％，其中牙结石及口腔卫生不良者为42％，冠周炎为48．8％，龈炎及牙周炎者为37．6％。结果显示：口腔毛滴虫与口腔疾患密切相关。 In this paper, 453 oral outpatients and physical examiners in Hengyang City were examined for oral trichomonas, and 150 people were found to have oral trichomonas, the positive rate was 33.1%; oral health group was 18.4%; there were oral diseases The disease group was 40.1%, with 42% in dental calculus and poor oral hygiene, 48.8% in pericoronitis, and 37.6% in gingivitis and periodontitis. The results showed that oral trichomoniasis is closely related to oral diseases.