title: Validation of Tanaka and Johnston's analysis in western UP Indian population.
abstract: OBJECTIVE
  To examine the applicability of the Tanaka and Johnston's method of prediction in a western UP population and to develop a new prediction method for this specific population if necessary.
  
  
  METHODS
  150 western UP school children (87 males and 63 females) with a mean age of 15.5 years were randomly selected. The mesio-distal crown diameters of the permanent canine and premolars were measured and comparisons were done between the actual tooth sizes and the values predicted by the Tanaka and Johnston method.
  
  
  RESULTS
  Significant sexual dimorphism was found in the tooth sizes. There were significant differences between the actual measurements and the predicted measurements derived by the Tanaka and Johnston prediction method. New linear regression equations were derived for both the genders for tooth size prediction in western UP population.
  
  
  CONCLUSIONS
  There are limitations in the application of the Tanaka and Johnston's prediction method to a western UP population. A gender discrepancy is seen between the males and the females. New regression equations were formulated for both the males and the females separately.
authors.affiliation: Department of Pedodontics and Preventive Dentistry, Santosh Dental College and Hospital, NCR, Delhi, India.
authors.forename: B
authors.initials: B
authors.lastname: Srivastava
authors.forename: H P
authors.initials: HP
authors.lastname: Bhatia
authors.forename: R
authors.initials: R
authors.lastname: Singh
authors.forename: A K
authors.initials: AK
authors.lastname: Singh
authors.forename: A
authors.initials: A
authors.lastname: Aggarwal
authors.forename: N
authors.initials: N
authors.lastname: Gupta
mesh_terms: D000293:Adolescent; D001641:Bicuspid / Q000033:anatomy & histology*; D003481:Cuspid / Q000033:anatomy & histology*; D003818:Dentition, Mixed; D005006:Ethnicity; D005260:Female; D006801:Humans; D007194:India; D016014:Linear Models; D008297:Male; D008334:Mandible; D008437:Maxilla; D003765:Models, Dental; D009811:Odontometry / Q000706:statistics & numerical data*; D012737:Sex Factors; D019228:Tooth Crown / Q000033:anatomy & histology*