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Cephalometric parameters affecting severity of anterior open bite
W M Tsang1, L K Cheung, N Samman
1Department of Oral and Maxillofacial Surgery, University of Hong Kong, Hong Kong.
International Journal of Oral and Maxillofacial Surgery
|November 5, 1997
Summary
This study on anterior open bite (AOB) found that palatal plane, mandibular occlusal plane, and dental heights significantly correlate with AOB severity. A steep mandibular occlusal plane is a key indicator.
Area of Science:
- Orthodontics
- Dentofacial Orthopedics
- Cephalometric Analysis
Background:
- Anterior open bite (AOB) is a complex malocclusion affecting dental and skeletal relationships.
- Understanding the cephalometric correlates of AOB severity is crucial for effective treatment planning.
Purpose of the Study:
- To investigate the correlation between various cephalometric measurements and the severity of anterior open bite (AOB).
- To identify key skeletal and dentoalveolar indicators associated with different degrees of AOB.
Main Methods:
- Cephalometric analysis of 104 patients with anterior open bite (AOB).
- Subjects were categorized into mild, moderate, and severe AOB groups based on incisor separation.
- Evaluation included 24 skeletal and 12 dentoalveolar measurements.
Main Results:
- Significant correlations were found between AOB severity and palatal plane, mandibular occlusal plane, upper anterior dental height, and upper posterior dental height.
- Skeletal jaw relationships in the horizontal plane showed weak correlation with AOB severity.
- A steep mandibular occlusal plane emerged as a significant indicator of AOB severity.
Conclusions:
- The mandibular occlusal plane and specific dental height measurements are important predictors of anterior open bite (AOB) severity.
- Horizontal skeletal discrepancies play a lesser role in determining AOB severity compared to vertical skeletal and dental factors.