Validation and Comparison of a New Method to Predict the Mesiodistal Width of Unerupted Canines and Premolars in a Chilean Population From Valparaíso Region, Chile

2023 • Volume 17 • Issue 4

Francisco Donaire; Javier Villalón; Pablo Navarro & Andrés Ugalde



One of the main orthodontic problems in mixed dentition is the determination of future tooth and size arch discrepancy. In order to predict the mesiodistal widths of unerupted permanent teeth different methods of analyses have been introduced. The aim of this study is to compare the Tanaka-Johnston analysis with a new regressive equation to predict the mesiodistal width of unerupted permanent canines and premolars in a Chilean population sample, from Valparaíso region. This study was conducted at the Universidad de Valparaíso Dental Faculty, from october 2022 to june 2023 (8 months), and the sample comprised historical dental casts from 202 patients (91 boys and 111 girls) in the age range of 11-20 from the orthodontics department. All the patients are from the Valparaíso region, Chile. The results show that the predictions of the new regressive equation method are closer to the actual mesiodistal measurements of the patients (ICC 0,773 for maxilla and 0,762 for mandible), compared to the TanakaJohnston method (ICC 0,665 for maxilla and 0,623 for mandible). There are no significant differences between the real values and the Lara-Sandoval method. Lara-Sandoval method is better than the one proposed by Tanaka-Johnston to determine the mesiodistal width of canines and premolars in this sample population. It is necessary to validate this method in other regions of the country to be used with greater security than the ones that already exists as a national standard method.

KEY WORDS: Mixed dentition, interceptive orthodontics, odontometry, clinical decision support systems.


How to cite this article

DONAIRE, F.; VILLALÓN, J.; NAVARRO, P. & UGALDE, A. Validation and comparison of a new method to predict the mesiodistal width of unerupted canines and premolars in a chilean population from valparaíso region. Int. J. Odontostomat., 17(4):470-478, 2023


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