title: [Cross-sectional study of dentine hypersensitivity in smaller cities and rural area in Sichuan province].
abstract: OBJECTIVE
  To investigate the clinical characteristics and risk factors of dentine hypersensitivity in smaller cities and rural area in Sichuan province.
  
  
  METHODS
  The examinee aged 20 - 69 years old were interviewed and divided into five age groups (20 - 29, 30 - 39, 40 - 49, 50 - 59 and 60 - 69). The random sampling methods were performed in this study. A total of eight spots were survied, including 4 communities and 4 spots in rural area of Sichuan province. The information about the examinee's age, gender, occupation, education level, tooth brushing methods, the frequencies of eating fresh fruits and fruit juices and so on, were asked and recorded. All subjects were further diagnosed by a blast of air from a triple syringe connected to an air compressor at a pressure of 4 atm under room temperature of about 19 - 24°C.
  
  
  RESULTS
  The premolars were the most commonly affected, followed by the first molar. The exposed root surface was the most commonly affected position [63.87% (663/1038)]. The first premolar had the greatest number of teeth with dentine hypersensitivity [29.96% (311/1038)]. Different tooth had different sensitive position. Female, too much time of using a tooth brush, and hydrochloric acid in gastric juice were risk factors for dentine hypersensitivity (OR value = 2.175, 1.157, 1.760).
  
  
  CONCLUSIONS
  Dentine hypersensitivity is influenced by multiple factors. Prevention and treatment need be performed by improving general oral health and periodontal conditions.
authors.affiliation: Department of Preventive Dentistry, West China School of Stomatology, Sichuan University, Chengdu.
authors.forename: Ke-hua
authors.initials: KH
authors.lastname: Que
authors.forename: Xue
authors.initials: X
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Yin
authors.forename: Ying-ying
authors.initials: YY
authors.lastname: Fu
authors.forename: De-yu
authors.initials: DY
authors.lastname: Hu
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D001641:Bicuspid / Q000473:pathology; D002681:China; D003430:Cross-Sectional Studies; D003481:Cuspid / Q000473:pathology; D003807:Dentin Sensitivity / Q000453:epidemiology* / Q000473:pathology; D005247:Feeding Behavior; D005260:Female; D005889:Gingival Recession / Q000150:complications; D006801:Humans; D006851:Hydrochloric Acid / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D008963:Molar / Q000473:pathology*; D009909:Oral Health; D017622:Periodontal Attachment Loss / Q000150:complications; D015995:Prevalence; D012307:Risk Factors; D012424:Rural Population; D012737:Sex Factors; D011795:Surveys and Questionnaires; D014092:Tooth Root / Q000473:pathology; D014099:Toothbrushing; D055815:Young Adult
chemical_list: D006851:Hydrochloric Acid