Prediction the widths of maxillary and mandibular canines and premolars from the widths of maxillary incisors and first molars (Iraqi study)

Abstract

Background: This study aimed to use the combined mesio-distal crowns widths of maxillary incisors and first molars aspredictors to the combined mesio-distal crowns widths of maxillary and mandibular canines and premolars.Materials and methods: The sample included 110 Iraqi Arab subjects with an age ranged between 17-25 years andclass I skeletal and dental relations. The crown widths of maxillary teeth and mandibular canines and premolars weremeasured at the largest mesio-distal dimension on the study casts using digital electronic caliper with 0.01 mmsensitivity. Pearson’s correlation coefficient was used to determine the relation between the combined mesio-distalcrowns widths of maxillary incisors and first molars and the combined mesio-distal crowns widths of maxillary andmandibular canines and premolars. Regression analysis was used to determine the equations that predict the widthsof maxillary and mandibular canines and premolars. Paired sample t-test was used to compare between the actualand predicted mesio-distal crown widths.Results and Conclusions: The findings showed a non-significant difference between the predicted and actual mesiodistalcrown widths; hence the combined mesio-distal widths of maxillary incisors and first molars can be used aspredictors for the combined mesio-distal widths of maxillary and mandibular canines and premolars