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Patterns of vertical growth in the face
1Department of Orthodontics, University of Michigan, Ann Arbor.
Summary
Facial growth patterns differ between skeletal open-bite and deep-bite individuals. Anterior facial dimensions show distinct development, while posterior dimensions do not, impacting orthodontic treatment timing.
Area of Science:
- Orthodontics
- Craniofacial Development
- Cephalometrics
Background:
- Understanding facial growth patterns is crucial for diagnosing and treating malocclusions.
- Skeletal open-bite and deep-bite represent distinct vertical facial patterns with unique developmental trajectories.
Purpose of the Study:
- To analyze and compare the longitudinal facial growth patterns in subjects with skeletal open-bite versus skeletal deep-bite.
- To identify typological differences in anterior and posterior facial dimensions during growth.
Main Methods:
- Longitudinal cephalometric data from 32 subjects (16 male, 16 female), aged 3-18 years, were analyzed.
- Subjects were categorized into four groups based on extreme lower face height percentages.
- Growth curves for anterior and posterior facial heights and ramal length were evaluated.
Main Results:
- Anterior facial dimensions exhibited typologically divergent growth patterns between open-bite and deep-bite groups.
- Posterior facial dimensions did not differentiate between the two skeletal types.
- The timing of the adolescent growth spurt varied, with female open-bite subjects starting earliest.
Conclusions:
- Distinct anterior facial growth patterns characterize skeletal open-bite and deep-bite.
- Posterior facial growth is not a distinguishing factor between these malocclusions.
- Growth spurt timing differs by sex and bite type, informing orthodontic treatment planning and prognosis.