JAVMA | APRIL 2022 | VOL 260 | NO. 7 727 History and Physical Examination Findings A 1.7-year-old indoor domestic shorthair cat with no reported history of trauma was referred because of a missing left maxillary canine tooth. Two weeks prior to presentation, oral examination by the refer- ring veterinarian revealed the presence of a complete set of permanent teeth, except for a persistent decid- uous left maxillary canine tooth and absence of the permanent left maxillary canine tooth. Once the left maxillary deciduous canine tooth exfoliated and no permanent canine tooth erupted, the cat was referred for evaluation and diagnostic imaging. Findings on referral physical examination were largely unremarkable, apart from reduced nasal air- fow on the left side and absence of the left maxillary canine tooth. Results of a CBC, serum biochemical profle, and urinalysis were within reference limits. The cat was anesthetized, and full-mouth dental ra- diography (Vistas Scan; Dürr Dental) was performed (Figure 1). Formulate diferential diagnoses, then read on. Diagnostic Imaging Findings and Interpretation Intraoral occlusal and left lateral dental radio- graphic images demonstrated an elongated radio- opaque structure with a shape resembling a mal- formed maxillary canine tooth in the left rostral nasal cavity (Figure 2). These fndings were suggestive of an ectopic left maxillary canine tooth. 1 Cone-beam CT (CBCT; VIMAGO Imaginalis; Fi- renze) of the skull was performed (80 kV, 50 mA, and 0.2-mm slice thickness), and images were viewed with the use of specialized software (InVivo5; Anato- mage). Findings on CT were consistent with those from dental radiography and demonstrated an elon- gated structure with peripheral mineral density and a radiolucent central cavity attributable to an odon- todysplastic tooth (Figure 3). This tooth was locat- ed in the ventral meatus of the left nasal cavity and extended caudally in the left side of the choanae. Peripherally, the tooth structure was surrounded by material with irregular margins and both soft tissue and mineral attenuation values. Focal loss of the nor- mal architecture of the nasal turbinates on the left side was also noted. The intranasal position of the left maxillary canine tooth with the crown pointing In collaboration with the American Veterinary Dental College Diagnostic Imaging in Veterinary Dental Practice Alessandro De Simoi, DVM 1,2 ; Arianna Marino Cerrato, DVM 1,2 ; Francesca Bartocetti, DVM 1,2 *; Boaz Arzi, DVM 3 1 Dentistry and Oral Surgery Service, Feltrina Veterinary Clinic, Feltre, Italy 2 Diagnostic Imaging Service, Feltrina Veterinary Clinic, Feltre, Italy 3 Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA *Corresponding author: Dr. Bartocetti (fbartocetti27@libero. it) https://doi.org/10.2460/javma.21.08.0375 Figure 1—Left lateral dorsal–right ventral oblique (A; rostral is toward the left) and occlusal (B; rostral is to- ward the bottom; the cat’s left side is toward the right) radiographic images of the maxilla of a 1.7-year-old do- mestic shorthair cat evaluated because of a missing left maxillary canine tooth. Unauthenticated | Downloaded 03/08/24 06:14 PM UTC