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South African Dental Journal

versão On-line ISSN 0375-1562
versão impressa ISSN 0011-8516


SETHUSA, MPS; BRIJLALL, S  e  MOTLOBA, DP. Comparison of two methods of predicting mesiodistal widths of permanent canines and premolars in a sample of black South Africans. S. Afr. dent. j. [online]. 2018, vol.73, n.1, pp.31-34. ISSN 0375-1562.

INTRODUCTION: Accurate tooth size prediction of permanent successor teeth is important for treatment planning during the mixed dentition stage OBJECTIVES: To compare and determine the accuracy of two methods used to predict mesiodistal widths of permanent canines, first and second premolars in a sample of Black South Africans METHODS: Measurements of teeth were performed on study models of a sample of 100 children (50 males and 50 females) aged between 17 and 21 years. Digital calipers, accurate to 0.05mm. were used. Estimations of the widths of the permanent canines, first and second premolars (C+P1+P2) were performed for mandibular and maxillary arches using the Schirmer and Wiltshire and the Modified Tanaka-Johnston prediction methods. The estimated (C+P1+P2) values were then compared with measurements of the actual teeth on the study models RESULTS: Males presented significantly larger mesiodistal tooth dimensions than females. The Modified Tanaka-Johnston equation is accurate for females but overestimates actual tooth measurements for males. The Schirmer and Wiltshire method is accurate for male maxillary and female mandibular tooth sizes but overestimates male mandibular and underestimate female maxillary tooth sizes CONCLUSION: Both methods have deficiencies; however the Modified Tanaka-Johnston equation proved preferable because it overestimates rather than underestimates actual tooth sizes

Palavras-chave : prediction; mesiodistal widths; Moyers method; Tanaka and Johnston equation.

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