A Case of Tooth Malformation Complicated by External and Internal Dental Fistulas in a Young Dog

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  • 奇形歯による外歯瘻および内歯瘻を形成した若齢犬の1例
  • キケイシ ニ ヨル ガイシロウ オヨビ ウチバロウ オ ケイセイ シタ ジャクレイケン ノ 1レイ

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Abstract

<p>A 3-year-old Toy Poodle was referred to our animal hospital because of a refractory mass and fistula in the left mandibular region. Although a mandibular mass had been resected by another veterinarian, it recurred one month later. Pasteurella multocida, a typical canine oral bacterium was identified on skin fistula specimen cultures. Oral examination under general anesthesia revealed abnormal grooves in the enamel of mandibular first molars bilaterally and mucogingival draining tracts associated with the left mandibular first molar. Radiography revealed mandibular first molar tooth malformations and periapical radiolucencies bilaterally. We extracted both teeth, achieving good progress. Tooth malformation (dens invaginatus) of the mandibular first molar in dogs is rare and can result in endodontic infections and periodontitis. A chronic inflammation eventually progresses to external or internal dental fistulas. If inflammatory lesions are associated with the mandibular skin, dental diseases should be considered, even in young dogs. Herein, we report a case of tooth malformation of the mandibular first molar complicated by internal and external dental fistulas in a young dog.</p>

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