Tooth size discrepancy; Bolton analysis

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Tooth size and anterior ratio in skeletal class III subjects with mandibular prognathism


L. Baidas, N. Al-Jasser

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Pediatric Dentistry and Orthodontics (POS)




Egyptian Dental Journal; 51(2): 653

Year of Publication



Egyptian Dental Association


King Saud University

Type of Publication

Article in Scientific Periodical Specialized Journal




Full Text (Yes,No)


Key words

Tooth size discrepancy; Bolton analysis; mandibular prognathism


Objective: The objectives of this investigation were to describe the prevalence of anterior tooth size discrepancies in Skeletal Class III with mandibular prognathism, and whether sexual dimorphism exists for anterior tooth size ratios.
Methods: The measurements were obtained from 40 study models with both sexes (19 female, 21 male). All patients were Saudi nationals, between the ages of 19 to 30 years old. Descriptive statistics and t-test were used for the analysis of the data.
Results: Subjects having skeletal Class III with mandibular prognathism showed highly significant anterior ratio (80.6 +2) compared to the Bolton Study (P<0.001), a high prevalence of anterior tooth size discrepancy, no sexual dimorphism and significant difference in some mesiodistal tooth size difference between sexes.
Conclusion: Tooth size analysis is an important diagnostic tool and should be included as one part of the records when establishing treatment planning.

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