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J Vet Dent. 2019 Jun;36(2):124-128. doi: 10.1177/0898756419873639. Epub 2019 Sep 22.

Microbiological Aspects of Naturally Occurring Primary Endodontic Infections in Dogs.

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Dentistry and Oral Surgery Department, Veterinary Faculty, Small Animal Clinic, University of Ljubljana, Slovenia.
Veterinary Faculty, Institute of Microbiology and Parasitology, University of Ljubljana, Slovenia.


Dental fractures are common in dogs, but data on microbiology of naturally occurring primary endodontic infections, and their relation to clinical and radiographic signs, are lacking. Samples were obtained from root canals of 32 periodontally healthy fractured teeth under aseptic conditions and immediately cultured for aerobic and anaerobic bacteria. Cultures were further identified by matrix-assisted laser desorption/ionization, time of flight technology. Sixty-one bacteria (30 bacterial species) were isolated from root canals; 54% were Gram-negative bacteria, 53% were facultative anaerobic, and 42% were anaerobic bacteria. Number of bacterial species in the root canals declined with the duration of fractures over 12 months. No statistically significant association was found between the number of bacterial species involved in the root canal infection and any of the clinical or radiographic signs of endodontic disease. Naturally occurring primary endodontic infections in dogs appear to be polymicrobial and involve only a selected number of opportunistic pathogen species.


dental fractures; dental radiography; endodontic disease; root canal microbiota; tooth infection dogs; veterinary dentistry

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