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Mandibular coronoid hyperplasia in pediatric patients
Michael S Jaskolka1, Barry L Eppley, John A van Aalst
1Department of Oral and Maxillofacial Surgery, University of North Carolina Children's Hospital, Chapel Hill, North Carolina, USA.
The Journal of Craniofacial Surgery
|August 2, 2007
Summary
Bilateral coronoid hyperplasia, a rare pediatric condition, causes limited mouth opening due to coronoid process overgrowth. Surgical removal and physical therapy are treatments, but outcomes vary, indicating an incomplete understanding of the pathology.
Area of Science:
- Pediatric dentistry
- Oral and maxillofacial surgery
- Medical imaging
Background:
- Bilateral coronoid hyperplasia is a rare pediatric condition.
- It can be an unrecognized cause of limited mouth opening in children.
- Potential causes include temporalis hyperactivity, hormonal influences, and genetic factors.
Purpose of the Study:
- To review the condition of bilateral coronoid hyperplasia in pediatric patients.
- To discuss diagnostic methods and treatment options.
- To highlight the importance of postoperative physical therapy and discuss variable outcomes.
Main Methods:
- Diagnosis is confirmed using plain films and computed tomography (CT) scans.
- Treatment involves bilateral coronoidectomies to address zygomatic impingement.
- Postoperative physical therapy is essential for maintaining achieved mouth opening.
Main Results:
- Excess coronoid growth leads to impingement on zygomatic processes, causing mandibular hypomobility.
- Surgical intervention aims to relieve this impingement.
- Variable outcomes suggest the exact pathology requires further investigation.
Conclusions:
- Bilateral coronoid hyperplasia is a significant cause of limited mouth opening in children.
- While surgical treatment can improve mandibular mobility, outcomes are inconsistent.
- Further research is needed to fully understand the underlying pathology of this condition.

