[Mouth oepning limitations due to coronoid-zygomatic-malar interference]

Area of Science:

• Oral and Maxillofacial Surgery
• Anatomy
• Biomechanics

Context:

• Limited mouth opening, or restricted mandibular mobility, can arise from various causes.
• Interference between the coronoid process and the zygomatic arch is an uncommon etiology for such limitations.
• Accurate diagnosis is crucial for effective management of this specific condition.

Purpose:

• To highlight the coronoid process-zygomatic arch interference as a cause of mouth-opening limitation.
• To discuss the diagnostic considerations and treatment modalities for this condition.
• To emphasize the role of surgical intervention and subsequent mechanotherapy.

Summary:

• Extra-ankylotic mouth-opening limitation can be caused by the coronoid process impinging on the zygomatic arch.
• While rare, especially in non-traumatic cases, prompt diagnosis allows for effective treatment.
• Treatment typically involves surgery targeting either the zygomatic arch or the coronoid process.
• Post-operative mechanotherapy is recommended when the coronoid process is surgically addressed.

Impact:

• Improves understanding of a rare cause of restricted mouth opening.
• Guides clinicians in diagnosing and managing coronoid process-zygomatic arch interferences.
• Highlights the importance of surgical and rehabilitative approaches for restoring mandibular function.