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Relation between cranial base flexure and position of the jaws
1Department of Orthodontics, School of Dental Medicine, University of Zagreb, Croatia.
Collegium Antropologicum
|January 24, 1998
Summary
The cranial base flexure correlates with jaw positions in both healthy individuals and those with malocclusions. This relationship is stronger in healthy subjects, defining three facial types: orthognathism, retrognathism, and prognathism.
Area of Science:
- Orthodontics
- Cephalometric analysis
- Craniofacial morphology
Background:
- The cranial base influences craniofacial development and jaw positioning.
- Understanding the relationship between cranial base flexure and jaw discrepancies is crucial for orthodontic diagnosis.
Purpose of the Study:
- To analyze the correlation between cranial base flexure and the sagittal and vertical positions of the maxilla and mandible.
- To identify cephalometric predictors for different sagittal bimaxillar relationships.
Main Methods:
- Conventional cephalometric analysis of 180 radiographs from eugnathic individuals and 256 from patients with malocclusions.
- Measurement of maxillar rotation, mandibular rotation, sagittal jaw positions, and cranial base flexure.
Main Results:
- A significant correlation was found between cranial base flexure and facial prognathism.
- Correlation coefficients were higher in eugnathic individuals compared to those with malocclusions.
- Regression analysis identified three basic types of sagittal bimaxillar relations: orthognathism, retrognathism, and prognathism.
Conclusions:
- Cranial base flexure is a significant factor in determining sagittal jaw relationships.
- Cephalometric analysis can effectively differentiate between orthognathism, retrognathism, and prognathism based on cranial base and jaw positions.
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