Unilateral synostosis of the zygo-maticotemporal suture associated with mandibular coronoid process impingement in a dog

Journal: Veterinary and Comparative Orthopaedics and Traumatology (VCOT)
ISSN: 0932-0814
DOI: http://dx.doi.org/10.3415/VCOT-12-12-0157
Issue: 2013: Issue 5 2013
Pages: 421-424

Unilateral synostosis of the zygo-maticotemporal suture associated with mandibular coronoid process impingement in a dog

J. M. Ryan (1), E. Fraga-Manteiga (1), T. Schwarz (1), D. N. Clements (1, 2)

(1) Royal (Dick) School of Veterinary Studies, Division of Clinical Sciences, The University of Edinburgh, Hospital for Small Animals, Roslin, Midlothian, Scotland; (2) The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, Scotland

Keywords

dog, Synostosis, suture, Zygomaticotemporal, temporomandibular

Summary

A 13-month-old dog was investigated for the complaint of open-mouth locked jaw. There were not any previous episodes of trauma witnessed. Computed tomographic evaluation revealed unilateral zygomatico-temporal synostosis and associated craniofacial asymmetry, with impingement of the mandibular coronoid process resulting in unilateral temporomandibular joint subluxation. Closed reduction of the subluxation was not maintained. Partial zygomatico-temporal suturectomy resulted in resolution of the clinical signs. To the author’s knowledge, isolated zygomaticotemporal syno-stosis with associated temporomandibular subluxation has not been reported in the dog.

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