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A Journal on Dentistry and Maxillofacial Surgery
Minerva Stomatologica 2002 July-August;51(7-8):327-40
Mixed dentition space analysis in a eastern Sicilian population
Verzì P., Leonardi M., Palermo F.
Background. The purposes of this study are:
1) predicting the sum of mesio-distal crown diameters of unerupted canines, first and second premolars, using the sum of mesio-distal diameters of lower permanent incisors, in a sample of Eastern Sicily population;
2) estimating the differences between our predictions and the ones developed by Tanaka & Johnston, by Moyers and by Ballard & Wylie.
Methods. We selected 150 plaster casts of permanent dentition of patients‹82 females and 68 males‹examined at the School of Orthodontics of the University of Catania. The width of canines, first and second premolars and lower incisors were taken by means of a bow-compass and a sliding digital caliper on the selected plaster casts.
Results. We calculated the following linear regression equations, with statistical method, to predict the sum of mesio-distal dimensions of canines, first and second premolars (Y) using the width of the lower incisors (X): Yfs = 11.40 + 0.42X for females in the upper arch; Yfi = 11.34 + 0.41X for females in the lower arch; Yms = 12.84 + 0.39X for males in the upper arch and Ymi =11.38 + 0.44X for males in the lower arch.
Conclusions. The results in our sample indicate that the sum of mesio-distal crown diameters of canines, first and second premolars is smaller in females than in males; besides those results suggest that the North-American authors' predictions overestimate the mesio-distal dimension of canines, first and second premolars in both sexes.