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Contribution of skeletal and dentoalveolar vertical components in the hypodivergent facial growth pattern : An
Nicolas Nassar1,2,3, Nayla Bassil-Nassif4, Roland Kmeid5,6
1Department of Orthodontics, Faculty of Dental Medicine, Saint Joseph University, P.O. Box 11-5076, Beirut, Lebanon. nicolas.nassar.dds@hotmail.com.
Purpose:
This observational study aimed to explore the association of various vertical skeletal and dentoalveolar components with the hypodivergence facial growth pattern in a Middle Eastern population.
Methods:
A total of 320 lateral cephalometric radiographs of Middle Eastern adults were selected and divided, based on their vertical facial growth pattern, equally into two groups: 1) hypodivergent (GoGn/SN ≤ 28°) and 2) normodivergent (28°
Results:
Hypodivergence was primarily determined by the skeletal vertical components, while dentoalveolar components were less important. The main contributors were posterior facial height (S-Go) with 50.0% for males and 46.6% for females, anterior facial height (N-Me) with 47.0% for males and 45.9% for females, as well as the ramus length (Co-Go), ranging from 29.9 to 32.5% for males and 24.3% for females. There was no significant gender-related dimorphism in the evaluated cephalometric components.
Conclusion:
The main contributing factors to hypodivergence were the skeletal mandibular components. Dentoalveolar heights contributed minimally to hypodivergence.
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