J Korean Assoc Oral Maxillofac Surg.  2022 Jun;48(3):182-187. 10.5125/jkaoms.2022.48.3.182.

Coronoidectomy for reduction of superolateral dislocation of mandible condyle

• Seok H
• Ko SO
• Baek JA
• Leem DH

• KMID: 2531056
• DOI: http://doi.org/10.5125/jkaoms.2022.48.3.182

Abstract

Superolateral dislocation of the condyle is a rare mandibular fracture. The treatment goal is to return the dislocated condyle to its original position to recover normal function. This study reports on superolateral dislocation of the condyle with mandibular body fracture. The mandibular body was completely separated, and the medial pole of the condyle head was fractured. The condyle segment was unstable and easily dislocated after reduction. The temporalis muscle on the condyle segment might have affected the dislocation of the condyle. A coronoidectomy was performed to disrupt the function of the temporalis muscle on the condyle segment in order to successfully reduce the dislocated condyle. Coronoidectomy is a simple procedure with minimal complications. We successfully performed a coronoidectomy to reduce the superolateral displaced condyle to its original position to achieve normal function. Coronoidectomy can be effectively used for reduction of superolaterally displaced condyles combined with severe maxilla-mandibular fractures.

Keyword

Coronoidectomy; Condyle fracture; Temporalis muscle

Figure

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  Fig. 1 A. Le Fort II fracture and mandibular symphysis fracture. B. Superolateral dislocation of the right condyle. C. Dislocation of the condyle after the first surgery.

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  Fig. 2 A. Successful reduction of the dislocated condyle on the glenoid fossa after the second surgery. B. Panoramic view at one year after the second surgery.

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  Fig. 3 A. Le Fort II fracture, mandibular symphysis, and body fracture. B. Superolateral dislocation of the left condyle. C. The dislocated condyle was reduced, and the fractured condyle head segment was fixed with lag screws. D. Successful reduction of the dislocated condyle and mandibular symphysis and body fracture.

Reference

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