Normal Anatomy of the Maxilla and Mandible ch28

Flashcards designed to help review key concepts and anatomy related to the maxilla, mandible, and their landmarks as covered in the lecture.

What are the two types of bone mentioned in the lecture?

Cortical bone and cancellous bone.

What is cortical bone?

The dense outer layer of bone that appears radiopaque on an image.

What is cancellous bone?

The soft, spongy bone located between two layers of dense cortical bone that appears primarily radiolucent.

What is a 'sinus' in terms of bone anatomy?

A hollow space, cavity, or recess within a bone.

What is the appearance of the incisive foramen in dental radiographs?

A small ovoid or round radiolucent area located between the roots of the maxillary central incisors.

Describe the lateral fossa.

A smooth, depressed area of the maxilla located just inferior and medial to the infraorbital foramen between the canine and lateral incisors.

What structure forms the floor of the nasal cavity?

The palatal processes of the maxilla and the horizontal portions of the palatine bones.

What is the appearance of the genial tubercles?

Ring-shaped radiopacity located below the apices of the mandibular incisors.

What does the mental foramen look like on a radiograph?

A small ovoid or round radiolucent area located in the apical region of the mandibular premolars.

What is the purpose of the periodontal ligament space?

It is the space between the root of the tooth and the lamina dura.

At what age do primary teeth typically begin to erupt?

At the age of 6 months.

Define the term 'alveolar crest' as it pertains to dental anatomy.

The most coronal portion of the alveolar bone found between teeth, appearing radiopaque.

What does the maxillary tuberosity appear as in dental radiographs?

A radiopaque bulge distal to the third molar region.

What is the significance of the inverted Y in dental anatomy?

It is formed by the intersection of the maxillary sinus and the nasal cavity, appearing as a radiopaque upside-down Y.

What are supporting structures of teeth outlined in the lecture?

Anatomy of alveolar bone, lamina dura, alveolar crest, and periodontal ligament space.