Landmark ID Assignment Flashcards
Opening or hole in bone located at the midline of the anterior portion of the hard palate directly posterior to the maxillary central incisors. The nasopalatine nerve exits the maxilla through the incisive foramen.
On an anterior maxillary periapical image, the incisive forament appears as a small, ovoid or round radiolucent area located between the roots of the maxillary central incisors
Incisive Foramen
The immovable joint between the two processes of the maxilla. (The palatine processes of the maxilla form the major portion of the hard palate.) Extends from the alveolar bone between the maxillary central incisors to the posterior hard palate
On an anterior maxillary periapical image, appears as a thin radiolucent line between the maxillary central incisors. Is bounded on both sides by a dense cortical bone that appears radiopaque. As the median palatal suture fuses with age, it may become less distinct on a dental image
Median Palatine Suture
Smooth depressed area of the maxilla located just inferior and medial to the infraorbital foramen between maxillary canine and lateral incisors. On an anterior maxillary periapical image, appears as a radiolucent area between the maxillary canine and lateral incisor. In some images may appear as a distinct radioluceny, in others it may appear absent. Varies depeniding on the anatomy of indiviidual
Lateral Fossa
Vertical bony wall or partition that divides the nasal cavity into the right and left nasal fossae. Formed by cartilage and 2 bones- the vomer and a portion of the ethmoid bone
Anterior maxillary PA, appears as vertical radiopaque partition that divides the nasal cavity. May be superimposed over the median palatal suture
Nasal Septum
Bony wall formed by the palatal processes of the maxilla and the horizontal portions of palatine bones. Floor is composed of dense cortical bone and defines the inferior border of the nasal cavity.
On an anterior PA, appears as a dense radiopaque band of bone superior to the maxillary incisors
Floor of Nasal Cavity
Sharp projection of the maxilla located at the anterior and inferior portion of the nasal cavity
On an anterior maxillary PA, appears as a V shaped radiopaque area located at the intersection of the floor of the nasal cavity and the nasal septum
Anterior Nasal Spine
Paired cavities or compartments of bone located within the maxilla. Located superior to maxillary premolar and molar teeth. Rarely does it extend anteriorly beyond the canines. At birth is the size of a small pea. With growth expands and eventually occupies a large portion of the maxilla. May extend to include interdental bone, molar furcations, or max. tuberosity region
On a posterior PA, appears radiolucent area located superior to the apices of the maxillary premolars and molars. Floor composed of dense cortical bone and appears as a radiopaque line
Maxillary Sinus
Rounded prominence of bone that extends posterior to the third molar region. Blood vessels and nerves enter the maxilla in this region and supply posterior teeth
Appearance, on posterior maxilllary PA, appears as a radiopaque bulge distlal to the third molar region
Maxillary Tuberosity
