Abstract:

Objective To investigate the anatomy of beagle dog’s maxillary sinus, and provide the anatomic data for animal study. Methods Sixteen maxillary sinuses of the beagle dog were collected and scanned by cone beam computerized tomography (CBCT). The morphology, position, volume, ostium of maxillary sinus as well as its relation to the adjacent tissues were examined. Two other health adult beagle dogs were used for histological examination in which after the preoprerational CBCT examination.A bone block in hard palate was surgicall lifted and the living mucosa tissue was sampled for histological examination. Results It was observed from CBCT that the shape of the maxillary sinus was nearly taper type which was stenosis in the front，spacious at the back. Maxillary sinus was located in the palate side between the maxillary third premolar and the maxillary first molar surrounded with bony. The maxillary sinus floor was in the palate side of the maxillary forth premolar, and was about 17-18mm distant from midpalatal suture. There was no obvious statistic difference in both side of same individual. Conclusion The characteristics of the bilateral maxillary sinus have no significant difference, and are conducive to make the randomly grouping design for maxillary sinus’s study; The rates of membrane perforation is reduced as for there is no bone crest or antral septa in sinus cavity. Sinus floor elevation in the right space by use of anatomic mark point in CBCT is able to accurately display the complete image of the maxillary sinus, and liftting bone block in hard palate of the the maxillary sinus floor is safer and more accurate, and more minimally invasive.

Key words: Maxillary sinus, Radiometry, Topography, HE staining, Cone beam computed tomography, Beagle dog