title: Mixed dentition analysis in a Senegalese population: elaboration of prediction tables.
abstract: Estimating the size of unerupted teeth is an essential aspect of orthodontic diagnosis and treatment planning in the mixed dentition. Three main methods have been used to estimate the mesiodistal crown widths of unerupted canines and premolars: direct measurements on radiographs; calculations from prediction equations and tables; and a combination of radiographic measurements and prediction tables. Because there are clear racial differences in tooth sizes, the objectives of this study were to produce odontometric data, correlation coefficients between the combined mesiodistal widths of the permanent mandibular incisors and the canine and premolars for each quadrant, and prediction tables with the regression equations, specifically for Senegalese children. Fifty black Senegalese students (25 women, 25 men, mean age 23.50 years) were selected from the University Cheikh Anta Diop in Dakar, Senegal. The mesiodistal crown diameters of the permanent teeth were measured with calipers. Significant sexual dimorphism was found in tooth sizes. The correlation coefficients between the total mesiodistal width of the mandibular permanent incisors and that of the maxillary and mandibular canines and premolars were found to be 0.53 and 0.70, respectively. The standard error of the estimate was better (0.66) for women in the maxilla, and the r(2) values ranged from 0.46 to 0.57 for both sexes. Prediction tables were prepared. The accuracy of the prediction tables should be tested in a larger sample including more ethnic groups.
authors.affiliation: Orthodontic Section, Department of Dentistry, Faculty of Medicine, Pharmacy and Dentistry, University Cheikh Anta Diop, Dakar, Senegal. fmdiagne@refer.sn
authors.forename: Falou
authors.initials: F
authors.lastname: Diagne
authors.forename: Khady
authors.initials: K
authors.lastname: Diop-Ba
authors.forename: Pape Ibrahima
authors.initials: PI
authors.lastname: Ngom
authors.forename: Khadim
authors.initials: K
authors.lastname: Mbow
mesh_terms: D000328:Adult; D044383:Black People; D003818:Dentition, Mixed; D005260:Female; D005544:Forecasting; D006801:Humans; D016014:Linear Models; D008297:Male; D009811:Odontometry / Q000379:methods*; D011859:Radiography; D012016:Reference Values; D015203:Reproducibility of Results; D012675:Senegal; D012727:Sex Characteristics; D014070:Tooth / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D019228:Tooth Crown / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D014097:Tooth, Unerupted / Q000033:anatomy & histology* / Q000000981:diagnostic imaging