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Mandibular antegonial notch depth in postpubertal individuals: A longitudinal cohort study
Christian Schütz1, Balazs J Denes1, Stavros Kiliaridis1,2
1Division of Orthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.
Clinical and Experimental Dental Research
|April 30, 2022
Summary
Deep antegonial notches are more common in males and increase significantly during the pubertal growth spurt. This study analyzed notch depth in individuals aged 17/18 and longitudinally in growing subjects.
Area of Science:
- Craniofacial morphology
- Human growth and development
- Epidemiological analysis
Background:
- The antegonial notch is a distinct feature of the mandible.
- Understanding its development and variations is crucial for craniofacial research.
Purpose of the Study:
- To conduct an epidemiological analysis of antegonial notch depth in postpubertal individuals.
- To longitudinally analyze the development of deep antegonial notches in growing individuals.
Main Methods:
- Analysis of lateral cephalograms from 302 untreated individuals (171 males, 131 females) aged 17/18 years.
- Investigation of sex and sagittal malocclusion as factors influencing notch depth.
- Longitudinal analysis of deep antegonial notches using earlier cephalograms (7/8 and 13/14 years).
Main Results:
- Mean antegonial notch depth was 2.0 ± 1.0 mm, significantly deeper in males (2.3 ± 1.1 mm) than females (1.5 ± 0.7 mm).
- Notch depth was slightly deeper in Class I malocclusion compared to Class II or III.
- Deep antegonial notches were observed in 21 subjects (all male) and increased significantly between 13/14 and 17/18 years.
Conclusions:
- Antegonial notch depth exhibits significant variation in postpubertal individuals, with a notable sexual dimorphism.
- Deep antegonial notches primarily develop during the pubertal growth spurt, not during prepubertal stages.
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