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ORIGINAL ARTICLE
Year : 2019  |  Volume : 10  |  Issue : 1  |  Page : 10-17

Prediction of the size of unerupted permanent canines and premolars in a Qatari sample


1 Department of Orthodontics, Hamad Dental Centre, Hamad Medical Corporation, Rumaila Hospital, Doha, Qatar
2 Department of Histopathology, Qatar University, College of Medicine, Research Lab, Doha, Qatar
3 Department of Orthodontics, Dental College, Khartoum University, Khartoum, Sudan

Correspondence Address:
Hayder Abdalla Hashim
Orthodontic Division, Hamad Dental Centre, Rumaila Hospital, P.O. Box 3050, Doha
Qatar
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijor.ijor_29_18

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Aim: The purpose of this investigation was to establish an equation for the prediction of the size of unerupted canines and first and second premolars in a Qatari population. Materials and Methods: In this study, dental casts of 100 Qataris (50 males and 50 females) were selected. The participants' age ranged from 15 to 20 years. The width of all permanent teeth with the exception of second and third molars was measured. The data were subjected to Student's t-test and regression analysis. Results: The results indicated that 15%, 25%, and 35% confidence levels were more accurate determinants of the unerupted canines and premolars than the commonly used 75% level of Moyers when both sexes were combined. The multiple regression equations revealed different confidence levels for males and females. Tanaka and Johnston's equations overestimate the predicted tooth width of the unerupted canine and first and second premolars. Conclusions: Three levels of confidence were found to be more accurate in the maxillary arch and two in the mandibular arch when compared to the commonly used 75% in Moyers' table when both sexes were combined. Therefore, three new equations for maxillary and mandibular arches are proposed to predict the size of unerupted canine and first and second premolar teeth for Qatari males and females and for both sexes combined.


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