Structure, Function, and Biomechanics of the Tibiofibular and Ankle Joints

The tibiofibular and ankle joints play a crucial role in movement and stability. Understanding their structure and biomechanics is essential for diagnosing injuries and improving treatment.

Ligaments of the Tibiofibular and Ankle Joints

Ligaments connect bones and provide stability. In the tibiofibular and ankle joints, several key ligaments contribute to function:

Ligaments of the Tibiofibular Joint

• Anterior Inferior Tibiofibular Ligament (AITFL) – Provides anterior stability.
• Posterior Inferior Tibiofibular Ligament (PITFL) – Supports the joint posteriorly.
• Interosseous Membrane – Maintains spacing and integrity between the tibia and fibula.

Ligaments of the Ankle Joint

• Deltoid Ligament – Ensures medial ankle stability.
• Anterior Talofibular Ligament (ATFL) – Most commonly injured ligament in ankle sprains.
• Calcaneofibular Ligament (CFL) – Prevents excessive ankle inversion.
• Posterior Talofibular Ligament (PTFL) – Supports posterior ankle stability.

Biomechanics and Function

The tibiofibular joint assists in force transmission during movement. The ankle joint enables dorsiflexion, plantarflexion, inversion, and eversion, ensuring smooth locomotion.

Clinical Relevance

Understanding ligamentous structures is key in managing ankle sprains, fractures, and syndesmotic injuries. Rehabilitation focuses on restoring strength and flexibility.