Anatomic variation of the clavicle: A novel three-dimensional study

Area of Science:

• Orthopedic Surgery
• Anatomical Morphology
• Biomechanical Engineering

Background:

• Understanding clavicle anatomy is crucial for treating clavicular fractures.
• Existing methods for anatomical assessment may lack precision and reproducibility.
• Novel approaches are needed to standardize clavicle morphology studies.

Purpose of the Study:

• To present a novel method for assessing clavicle geometric morphology using 3D statistical shape analysis.
• To identify and quantify sex- and side-specific anatomical variations of the clavicle.
• To establish a standardized and reproducible approach for clavicle anatomical studies.

Main Methods:

• Utilized high-resolution computed tomography (CT) scans of 27 clavicles (15 fresh frozen specimens, 16 from database).
• Reconstructed CT scans and analyzed using specialized statistical software for 3D statistical shape analysis.
• Measured geometric parameters to assess morphological differences.

Main Results:

• Observed significant sex-specific differences: male clavicles were longer, wider, and thicker than female clavicles.
• Identified side-specific differences: right clavicles exhibited greater medial depth than left, particularly in women.
• Noted sex-specific differences in lateral depth and sternal angle: males had greater lateral depth, while females had larger sternal angles.

Conclusions:

• 3D statistical shape analysis provides an accurate, precise, and reproducible method for studying clavicle anatomy.
• This approach standardizes anatomical studies, eliminating observer variability and enhancing comparability.
• Findings offer valuable insights for clinicians, implant design, and future anatomical research.