title: Accuracy of Moyers' probability chart in a group of Thai subjects.
abstract: The objective of this study is to investigate the accuracy of Moyers' probability chart in predicting canine and premolar sizes from the sum of lower incisors in a group of Thai subjects. The fifty models of orthodontic patient, Faculty of dentistry, Mahidol University with no loss of tooth material mesio-distally, fully erupted permanent teeth, no mesial or distal restoration and normal tooth morphology were selected. The results of this study show that the under-estimation less than or equal to 2 mm. is 32 casts on upper (64%) and 28 casts on lower (56%) and the over estimation greater than 2 mm. is 16 casts on upper (32%) and 18 casts on lower (36%). In comparison of 14 models which have the same value of sum of lower incisors, there is a significant (alpha = 0.05) difference between the combined canine and premolar size of this study and Moyers' probability chart.
authors.affiliation: Faculty of Dentistry, Mahidol University.
authors.forename: S
authors.initials: S
authors.lastname: Dechkunakorn
authors.forename: J
authors.initials: J
authors.lastname: Chaiwat
authors.forename: P
authors.initials: P
authors.lastname: Sawaengkit
mesh_terms: D006801:Humans; D009811:Odontometry / Q000379:methods*; D011237:Predictive Value of Tests; D011336:Probability; D013785:Thailand; D014070:Tooth / Q000033:anatomy & histology*