Proximal tibiofibular joint: Rendezvous with a forgotten articulation.

Area of Science:

• Orthopedics
• Sports Medicine
• Biomechanics

Background:

• The proximal tibiofibular joint (PTFJ) is a synovial joint crucial for dissipating torsional and bending stresses at the ankle.
• PTFJ dislocations, though rare, can lead to chronic joint instability and significant functional deficits if not diagnosed and treated promptly.
• Undiagnosed PTFJ injuries are common in polytrauma and isolated knee injuries, often missed due to a lack of specific diagnostic signs.

Purpose of the Study:

• To review the clinical anatomy, biomechanics, and traumatic pathology of the PTFJ.
• To emphasize the importance of early diagnosis of PTFJ dislocations, particularly in athletes.
• To highlight the implications of PTFJ injuries on knee joint stability and function.

Main Methods:

• Literature review of clinical anatomy, biomechanics, and traumatic pathology of the PTFJ.
• Analysis of diagnostic challenges and implications of missed PTFJ dislocations.
• Emphasis on clinical suspicion and appropriate diagnostic imaging.

Main Results:

• PTFJ plays a significant role in weight-bearing and stress dissipation.
• Dislocations can compromise knee stability due to ligamentous attachments.
• High-energy knee injuries with peroneal nerve palsy warrant suspicion for PTFJ dislocation.

Conclusions:

• A high index of suspicion is essential for early PTFJ dislocation diagnosis.
• Early diagnosis prevents chronic instability, extensive surgeries, and improves functional outcomes.
• Increased clinical awareness is vital to avoid diagnostic delays and overtreatment.