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Mixed dentition analysis - Applicability of two non-radiographic methods for Chennai school children
Naveen Kumar Kommineni1, Chowdavaram Venkat Subba Reddy2, Nelapati Sarath Chandra2
1Department of Pedodontics and Preventive Dentistry, Chadalawada Krishna Srinivasa Teja Institute of Dental Sciences, Tirupati, Andhra Pradesh, India.
Aim:
To evaluate the applicability of the Tanaka and Johnston (1974) and Moyers (1988) methods in predicting the size of permanent canines and premolars in Chennai school children.
Materials And Methods:
470 sets (127 female and 343 male) of cast models were included in the sample. Mesio-distal (m-d) widths of all teeth from left to right first molars were measured and compared with the predicted values derived from Tanaka and Johnston and Moyers methods.
Results:
There was significant bilateral symmetry and sexual dimorphism in teeth sizes seen in both the sexes. Sum of the m-d diameter of permanent mandibular incisors can be used reliably to predict the sum of m-d diameters of unerupted canines and premolars.
Conclusions:
Tanaka and Johnston's method cannot accurately predict the m-d widths. Moyers' prediction tables can be used to estimate the m-d widths of unerupted canines and premolars closer to 50% probability level.
