Iran J Vet Surg, Print ISSN: 2008-3033, Online ISSN: 2676-6299

Document Type : Clinical Report


1 Veterinary Dentist, Sorriso Animal Veterinary Dental Center, Guarulhos, São Paulo, Brazil.

2 Responsible for the Technical Division, Guarulhos Zoo, Guarulhos, São Paulo, Brazil.

3 Department of Veterinary Medicine, Anhembi Morumbi University, São Paulo, Brazil.


An adult female black-eared opossum (Didelphis aurita) was found in the city of Guarulhos, Brazil, and was sent to veterinary care for clinical examination and future rehabilitation. In the physical exam, it was possible to verify mobility between the hemimandibles. The animal was submitted to the anesthetic procedure for a complete oral exam, intraoral radiography, and possible surgical intervention. The opossum was diagnosed with mandibular symphysis disjunction, needing surgery. The technique chosen was the labial locking system with buttons and cerclages. After the procedure, the animal was sent to the environmental organs for rehabilitation. After 40 days, the locking system was removed showing a complete healing of the mandibular symphysis. The animal was reintroduced to nature within 45 days of the procedure.


Main Subjects

  1. Cerqueira R. The distribution of Didelphis in South America (Polyprotodontia, Didelphidae). Journal of Biogeography. 1985; 12: 135-145.
  2. Bezerra-Santos MA, Ramos RAN, Campos AK, Dantas-Torres F, Otranto D. Didelphis spp. opossums and their parasites in the Americas: A one health perspective. Parasitology Research. 2021; 120(12): 4091-4111.
  3. Gilbert AT. The ecological range and principles of wildlife rabies virus perpetuation in the Americas. In: History of Rabies in the Americas: From the Pre-Columbian to the Present, Volume I: Insights to Specific Cross-Cutting Aspects of the Disease in the Americas. Cham: Springer International Publishing. 2023; 61-75.
  4. Bitencourt M, Bezerra A. Infection agents of Didelphidae (Didelphimorphia) of Brazil: an underestimated matter in zoonoses research. Mammalia. 2022; 86(2):105-122.
  5. Mead AJ, Patterson DB. Skeletal lesions in a population of Virginia opossums (Didelphis virginiana) from Baldwin County, Georgia. Journal of wildlife diseases. 2009; 45(2): 325-332.
  6. Mohamed R. A descriptive morphometric approach of the skull and mandible of the common opossum (Didelphis marsupialis linnaeus, 1758) in the Caribbean and its clinical application during regional anaesthesia. Veterinary Sciences. 2018; 5(1): 29.
  7. Schimming BC, Reiter LFF, Sandoval LM, Filadelpho AL, Inamassu LR, Mamprim MJ. Anatomical and radiographic study of the white-eared opossum (Didelphis albiventris) skull. Pesquisa Veterinária Brasileira. 2016; 36: 1132-1138.
  8. Beecher RM. Functional significance of the mandibular symphysis. Journal of Morphology. 1979; 159(1): 117–130.
  9. Kubein-Meesenburg D, Nägerl H, Schwestka-Polly R, Thieme KM, Fanghänel J, Miehe B. Functional conditions of the mandible: Theory and physiology. Annals of Anatomy-Anatomischer Anzeiger. 1999; 181(1): 27-32.
  10. Davidson JR, Bauer MS. Fractures of the mandible and maxilla. Veterinary Clinics of North America: Small Animal Practice. 1992; 22(1): 109-119.
  11. Bilgili H, Kurum B. Treatment of fractures of the mandible and maxilla by mini titanium plate fixation systems in dog and cats. Australian Veterinary Journal. 2003; 81(11): 671-673.
  12. Legendre L. Maxillofacial fracture repairs. Veterinary Clinical Small Animal. 2005; 35: 985-1008.