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Morphological variation in the anterior cranial fossa
Emi Kasai1, Shintaro Kondo2, Kazutaka Kasai1
1Department of Orthodontics and Dentofacial Orthodontics, School of Dentistry at Matsudo Nihon University Chiba Japan.
Clinical and Experimental Dental Research
|May 4, 2019
Summary
This study clarifies the anatomical relationships between the frontal, ethmoid, and sphenoid bones in the anterior cranial fossa. Understanding these variations is key for clinical orthodontics and assessing skull development.
Area of Science:
- Anatomy
- Anthropology
- Orthodontics
Background:
- The anterior cranial fossa, formed by the frontal, ethmoid, and sphenoid bones, is crucial in clinical orthodontics.
- The precise morphological relationships and developmental variations among these bones are not fully understood.
Purpose of the Study:
- To describe the morphological relationships among the frontal, ethmoid, and sphenoid bones.
- To explore factors influencing individual variations in adult skulls, considering postnatal development.
Main Methods:
- Macroscopic observation and computed tomography (CT) imaging in the median sagittal plane.
- Analysis of 100 adult Indian skulls and 18 Japanese juvenile skulls.
Main Results:
- Three distinct types of relationships were identified among the bones in adult skulls: ethmoid spine formation, straight/concave borders, and frontal bone interposition.
- Similar structures were observed in juvenile skulls, suggesting early developmental origins for these variations.
Conclusions:
- The anterior cranial base's morphology is shaped by the distinct developmental processes of the frontal, ethmoid, and sphenoid bones.
- Subtle developmental differences contribute significantly to the observed morphological variations in adult skulls.
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