Trismus Due to Bilateral Coronoid Hyperplasia.

Area of Science:

• Oral and Maxillofacial Surgery
• Radiology
• Anatomy

Background:

• Bilateral coronoid hyperplasia is a condition characterized by enlargement of the coronoid processes, leading to impingement on the zygomatic bone.
• This impingement causes progressive, painless trismus (limited mouth opening).
• The exact etiology of coronoid hyperplasia remains unclear, with several hypotheses lacking substantial evidence.

Observation:

• Advanced imaging techniques, including multiplanar reformatting of axial scans and 3D reconstruction, allow for precise visualization of the coronoid and zygomatic structures.
• These techniques aid in understanding the spatial relationships within the temporal and infratemporal fossae.

Findings:

• The case study highlights a patient experiencing trismus due to bilateral coronoid hyperplasia.
• Surgical intervention, specifically coronoidectomy, resulted in a significant increase in mouth opening.

Implications:

• Coronoidectomy can be an effective treatment for trismus caused by bilateral coronoid hyperplasia.
• Accurate imaging is crucial for diagnosis and surgical planning in such cases.
• Further research into the etiology of coronoid hyperplasia is warranted.