[Spatial structure of talus trabeculae based on high resolution X-ray and micro-CT]

Area of Science:

• Orthopedic research
• Bone biomechanics
• Anatomical structure analysis

Background:

• Understanding cancellous bone structure is crucial for treating talar fractures and designing prostheses.
• The talus bone's specific internal architecture influences force transmission and stability.

Purpose of the Study:

• To investigate the alignment and structure of cancellous bone in the talus.
• To provide a theoretical basis for talar fracture reduction and prosthesis design.

Main Methods:

• Micro-computed tomography (Micro-CT) scanning of 40 adult talar specimens.
• Analysis of bone volume fraction, bone surface area fraction, trabecular thickness, number, and pattern factor.
• High-resolution X-ray imaging of sliced talar specimens in coronal, sagittal, and horizontal planes.

Main Results:

• No significant differences in trabecular parameters between medial/lateral or right/left talar sides.
• Significant differences in trabecular number, thickness, and pattern factor were found between the talar head, neck, and body.
• Talar body trabeculae are vertically aligned plates; neck trabeculae are twisted; head trabeculae are semi-arc-shaped.

Conclusions:

• Talar trabeculae exhibit clear directionality and function, necessitating anatomical reduction for fractures.
• Talar prosthesis design should consider the stress distribution and directional forces during ambulation.