Symmetry analysis of talus bone: A Geometric morphometric approach

Area of Science:

• Orthopedics
• Anatomy
• Biomechanical Engineering

Background:

• The talus bone is crucial for ankle joint function.
• Understanding talus bone symmetry is important for surgical planning and injury analysis.

Purpose of the Study:

• To quantitatively assess the left-right symmetry of human talus bones using geometric morphometrics.
• To identify the extent and location of any geometric asymmetries.

Main Methods:

• CT scans of 11 pairs of intact talus bones were analyzed.
• Volume, surface area, and 3D shape deviations were quantified.
• Asymmetry locations were identified using deviation analysis.

Main Results:

• Talus bones demonstrated strong bilateral symmetry.
• Differences in surface area and volume between left and right tali were less than 7.5%.
• Mean 3D deviation ranged from -0.74 mm to 0.62 mm, with asymmetries often in clinically insignificant areas.

Conclusions:

• Left and right talus bones in intact human ankle joints are highly symmetrical.
• Findings support using the contralateral talus as a control in trauma cases and inform talus surgery.
• Geometric morphometrics provides a valuable tool for assessing bone symmetry.