关键词: 牙本质敏感, 氟牙症, 农村, 流行病学

Abstract:

Abstract：Objective To investigate the prevalence and risk factors of dentin hypersensitivity in endemic fluorosis rural area of Liaoning Province. Methods Random sampling methods were performed，and 800 adults living in the same endemic fluorosis county in Liaoning province aged 20 - < 70 were selected. A structured questionnaire and a clinical examination on dentin hypersensitivity were used in the survey. The relative risk factors of dentin hypersensitivity were analyzed. Fluoride ion selection electrode was used to determinate fluoride content in drinking water. Results The fluoride concentration in drinking water in the county was between 1.15 mg/L and 1.50 mg/L；the prevalence of dental fluorosis was 95.0%. Totally 800 20 - < 70 years old subjects completed a structured interview and underwent a clinical examination on dentin hypersensitivity. Among them，79 were found to have dentin hypersensitivity，the prevalence being 9.9%. There was no difference between male and female. The commonest teeth affected were the lower front teeth，followed by the first molar. The exposed root surface was the most commonly affected position. The time of using a tooth brush was the risk factor for dentin hypersensitivity （OR = 2.210）. Nobody in sensitive group had taken measurements or gone to see the dentist. Conclusion The prevalence of dentin hypersensitivity may be decreased and the time of using a tooth brush is the risk factor when the drinking water fluoride concentration is between 1.15 mg/L and 1.50 mg/L.