Maxillary sinus and maxillary recess in dogs: morphology and computed tomography [Polish]

摘要

The peculiar clinical picture of abscesses in the roots of dog's buccal teeth of the maxilla inspired the authors of this paper to establish the topography of the morphological structures of the indicated part of the head. an anatomical preparation on the corpses of 10 specimens was carried out and, in 3 cases, also observation with the use of RTG television. RTG and computed tomography pictorial examination were performed on 20 dogs of different breeds. General Electric was used in the RTG and CT/e examination. Before the examination the animals had been put under a general anesthetic. The computed tomography examination were carried out with the use of the axial technique in a bone window using our own research reports. The anatomical preparation demonstrated a distinct area separated with an opening in the lateral-caudal part of the nasal cavity. The scaffolding was created from the ethmoid bone, maxilla, lacrimal and palatine bone. The observaion of the contrast injected above the roots of the teeth did not show its presence in the nasal cavity. The RTG pictures did not allow for an unambiguous interpretation of the examined area. The computed tomography did not demonstrate an air space in the area of the maxilla. The measurements of the density of the bones taken over the roots of the P-4, M-1, M-2 teeth showed the presence of sponge tissue and soft tissue. The CT examination confirmed the presence of the area isolated in anatomical preparation in the nasal cavity above the roots of P-4, M-1 teeth. The region of the nasal cavity should be exclusively called maxillary recess, that is recessus maxillaris. This structure should not be described in the morphology of paranasal sinuses. The lack of an air space in the maxilla is equivalent to the lack of the maxillary sinus, sinus maxillaris in dogs and explains the clinical problem that has been put forward.