Pathologic Mandibular Fracture Associated with Bilateral Dentigerous Cysts in a Dog

Rosario Vallefuoco,Olivier Gauthier,Rebecca Lauren Jones

doi:10.1055/s-0042-1742474

Rosario Vallefuoco, Olivier Gauthier + Show 1 more

Open Access

https://doi.org/10.1055/s-0042-1742474

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Abstract

AbstractThis report describes the management and computed tomographic (CT) follow-up of a pathologic fracture of the mandibular body associated with bilateral dentigerous cysts in a 16-month-old Boxer. Bilateral, rostral, mandibular lesions consistent with dentigerous cysts were identified by intraoral radiography and CT. The left cyst was associated with an open, mildly displaced mandibular fracture. Treatment of the cystic lesions consisted of surgical exposure, extraction of embedded teeth, curettage of the cyst lining, and placement of demineralized bone matrix. Reduction and stabilization of the fracture were achieved by interdental wiring combined with an intraoral splint. Follow-up examination and CT imaging were performed at 8, 18, and 85 weeks postoperatively. Complete fracture healing and resolution of both cystic lesions were confirmed at 18 weeks with no recurrence evident at 85 weeks. No complications were encountered. To the authors' knowledge, this is the first case report of a pathologic mandibular fracture secondary to a dentigerous cyst in a dog, documenting the healing of dentigerous cysts via CT with progressive replacement of demineralized bone matrix by new osseous growth. Surgical treatment of the pathologic mandibular fracture and the bilateral dentigerous cysts resulted in an excellent clinical outcome.

Highlights

Pathologic fractures of the mandible account for a relatively small proportion of oral fractures in dogs, most of which are attributable to severe periodontal disease or neoplasia.[1,2] Odontogenic cysts (OC) are epithelial-lined cavities derived from the odontogenic epithelium and are reportedly rare in dogs.[3,4] Subtypes of OC described in dogs include dentigerous cysts (DC), radicular cysts and odontogenic parakeratinized cysts.[5]
A combination of intraoral radiography and computed tomographic (CT) was used for the diagnosis of the bilateral DCs and a left-sided pathologic mandibular fracture
The diagnostic yield of CT is greater than that of radiography for the identification of fracture morphology in the craniomaxillofacial region that is useful for surgical planning.[22]

Summary

Introduction

Pathologic fractures of the mandible account for a relatively small proportion of oral fractures in dogs, most of which are attributable to severe periodontal disease or neoplasia.[1,2] Odontogenic cysts (OC) are epithelial-lined cavities derived from the odontogenic epithelium and are reportedly rare in dogs.[3,4] Subtypes of OC described in dogs include dentigerous cysts (DC), radicular cysts and odontogenic parakeratinized cysts.[5]. Pathologic fractures of the mandible account for a relatively small proportion of oral fractures in dogs, most of which are attributable to severe periodontal disease or neoplasia.[1,2]. Odontogenic cysts (OC) are epithelial-lined cavities derived from the odontogenic epithelium and are reportedly rare in dogs.[3,4]. Subtypes of OC described in dogs include dentigerous cysts (DC), radicular cysts and odontogenic parakeratinized cysts.[5]. Dentigerous cysts are the most reported subtype and are mainly described in small and brachycephalic breeds.[4–9]. They are associated with unerupted teeth and arise from proliferation of tissue remnants of the enamel organ or reduced enamel epithelium.[10]. Boxers are wellrecognized as a breed with an increased risk of developing

Objectives

Conclusion