title: [The concern and preference of college students in Beijing Haidian district for female maxillary anterior tooth esthetic factors].
abstract: OBJECTIVE
  To evaluate Beijing college students' concern and preference for maxillary anterior tooth esthetic factors.
  
  
  METHODS
  Several images about lip and tooth were made through computer. A questionnaire was sent out to students in ten colleges and then collected. There were five factors to be evaluated: relationship of maxillary incisors and lower lip, numbers of tooth exposed, shape of centric incisor, crown width-length ratio, gingival margin. Concern of the beauty of anterior tooth, ie. tooth shape, tooth arrangement, shape of gingiva and so on, were then analyzed.
  
  
  RESULTS
  There were 408 responses collected, and 47.5% (194/408) of them preferred light contact between upper incisors and lower lip; 49.5% (202/408) preferred 8 tooth exposed when smile; 69.1% (282/408) preferred oval crown shape; 52.5% (214/408) preferred 0.85 as a crown width-length ratio; 49.5% (202/408)of responses chose the curve of gingiva runs horizontal. The average score of concern for male was 52.6% (100/190), for female was 59.6% (130/218).
  
  
  CONCLUSIONS
  Most results from this study accord with the classical principles of tooth esthetics. Sex affects the concern and preferences of maxillary anterior tooth esthetics factors.
authors: Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors: Yang
authors: Y
authors: Yang
authors: Yi-ping
authors: YP
authors: Huang
authors: Fei-yu
authors: FY
authors: DU
authors: Cong
authors: C
authors: Fan
mesh_terms: D000328:Adult; D002681:China; D004955:Esthetics, Dental; D005260:Female; D005881:Gingiva / Q000033:anatomy & histology; D006801:Humans; D007180:Incisor / Q000033:anatomy & histology; D008046:Lip / Q000033:anatomy & histology; D008297:Male; D008437:Maxilla / Q000033:anatomy & histology; D009811:Odontometry / Q000379:methods*; D057240:Patient Preference; D012737:Sex Factors; D012904:Smiling; D011795:Surveys and Questionnaires; D019228:Tooth Crown / Q000033:anatomy & histology; D055815:Young Adult