Bilateral rostral temporomandibular luxation with bilateral coronoid fracture in a Welsh pony. Issue 1 (19th March 2020)

• Record Type: Journal Article
• Authors: Luedke, Lauren K; Nixon, Alan J; Whitty, Justin A; Irby, Nita L; Ducharme, Norm G
• Is Part Of: Veterinary record case reports. Volume 8:Issue 1(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-03-19
• Subjects: horses -- maxillofacial surgery -- radiography -- CT -- ophthalmology; Veterinary medicine -- Case studies -- Periodicals; Veterinary medicine -- Periodicals; 636.08905
• DOI: 10.1136/vetreccr-2018-000785
• Languages: English
• ISSNs: 2052-6121

Abstract

Abstract : Temporomandibular joint (TMJ) luxation in the horse is a rare condition. There are few reports of unilateral luxation with successful reduction; bilateral luxation with concurrent bilateral coronoid fracture has not been reported. The diagnosis and closed reduction technique for rostral TMJ luxation are reported, along with the clinical outcome. A horse with an abnormally open positioned jaw presented for evaluation. Clinical exam showed a fixed open mouth, unable to be manually closed. Radiography showed multiple fractures associated with left and right TMJs. CT provided a more complete appraisal of the luxation and associated coronoid fracture orientation, as well as hyoid apparatus malposition (ie, temporohyoid subluxation). Closed reduction was achieved in this case using a fulcrum speculum between the molars, and a reduction device to forcibly appose the rostral mandible to the premaxilla with the patient anaesthetised. Functional mastication was a positive outcome; a partially phthisical, blind left eye persisted.