title: Bolton tooth size ratio among Sudanese Population sample: A preliminary study.
abstract: BACKGROUND
  The study of the mesiodistal size, the morphology of teeth and dental arch may play an important role in clinical dentistry, as well as other sciences such as Forensic Dentistry and Anthropology.
  
  
  OBJECTIVE
  The aims of the present study were to establish tooth-size ratio in Sudanese sample with Class I normal occlusion, to compare the tooth-size ratio between the present study and Bolton's study and between genders.
  
  
  METHODS
  The sample consisted of dental casts of 60 subjects (30 males and 30 females). Bolton formula was used to compute the overall and anterior ratio. The correlation coefficient between the anterior ratio and overall ratio was tested, and Student's t-test was used to compare tooth-size ratios between males and females, and between the present study and Bolton's result.
  
  
  RESULTS
  The results of the overall and anterior ratio was relatively similar to the mean values reported by Bolton, and there were no statistically significant differences between the mean values of the anterior ratio and the overall ratio between males and females. The correlation coefficient was (r = 0.79).
  
  
  CONCLUSIONS
  The result obtained was similar to the Caucasian race. However, the reality indicates that the Sudanese population consisted of different racial groups; therefore, the firm conclusion is difficult to draw. Since this sample is not representative for the Sudanese population, hence, a further study with a large sample collected from the different parts of the Sudan is required.
authors.affiliation: Department of Orthodontic, University of Medical Sciences and Technology, Dental College, Khartoum, Sudan.
authors.forename: Ala'a Hayder
authors.initials: AH
authors.lastname: Abdalla Hashim
authors.affiliation: Department of Orthodontic, University of Medical Sciences and Technology, Dental College, Khartoum, Sudan.
authors.forename: Al-Hadi Mohi
authors.initials: AH
authors.lastname: Eldin
authors.affiliation: Orthodontic Section, Hamad Medical Corporation, Dental Centre, Rumailah Hospital, Doha, Qatar.
authors.forename: Hayder Abdalla
authors.initials: HA
authors.lastname: Hashim
keywords: Anterior ratio; Bolton ratio; Sudanese population; overall ratio; tooth-size