Computed Tomography Angiography-Based Morphometry of the Stylohyoid Complex as a Guide for Craniofacial and Skull...

Area of Science:

• Anatomy
• Radiology
• Anthropology

Background:

• The styloid process of the temporal bone is crucial for anatomical studies.
• Understanding its morphometrics is key for diagnosing conditions like Eagle syndrome.
• Age and sex significantly influence styloid process morphology.

Purpose of the Study:

• Establish new morphometric reference values for the styloid process.
• Investigate age- and sex-related differences in styloid process dimensions.
• Analyze the 3-dimensional spatial orientation of the styloid process.

Main Methods:

• Retrospective analysis of 339 CT angiographies.
• Measurements included styloid process length, diameter, and angular orientation.
• Evaluated ossification of the stylohyoid ligament and distance to the hyoid bone.

Main Results:

• Mean styloid length was ~26.3 mm, greater in males and increasing with age.
• Increasing length correlated with medial and dorsal deviation of the styloid tip.
• Mean diameter was ~3.84 mm, with age-related enlargement observed.

Conclusions:

• New morphometric values for the styloid process reveal age-related changes and tip deviation.
• CTA-based morphometry provides a framework for understanding Eagle syndrome.
• Standardized values can improve diagnosis and treatment of stylohyoid pathology.