Radiology ch. twenty six, week 8

•Why do you need to understand normal anatomy on an xray?

Name 2 different types of bone

derived from the latin work cortex, and means outer layer. The dense outer layer of the x-ray beam, and appears radiopaque on a radiograph.

What type of bone is the inferior border of the mandible made up of?

derived from Latin, and means arranged like a lattice. Soft and spongy bone located between 2 layers of dense cortical bone. Composed of numerous bony trabecuae that form a lattice like network of intercommunicating spaces filled with bone marrow.

How do bony trabeculea sections appear on a radiograph?

How do bone marrow spaces in cancellous bone appear on a radiograph?

Cancellous bone appears predominantly________________

composed of dense cortical bone and appear radiopaque on dental radiographs. there are 5 terms to describe them

What are the 5 terms used to describe prominences of bone?

marked prominence or projection of bone; an example is the coronoid process of the mandible

a linear prominence or projection of bone; example is the internal oblique ridge of the mandible

A sharp, thorn like projection of bone; example is anterior nasal spine of maxilla

a small bump or nodule of bone; an example is the genial tubercles of the mandible

a rounded prominence of bone; example is maxillary tuberosity

true or false. spaces and depressions in bone do not resist the passage of x-ray beam and appear radiolucent on radiographs

What are the 4 terms used to describe spaces and depressions in bone?

tube-like passageway through bone that contains nerves and blood vessels; example is mandibular____________

an opening or hole in bone that permits the passage of nerves and blood vessels; example is mental______________of the mandible

a broad, shallow, scooped-out or depressed area of bone; example is the submandibular_______________of the mandible

a hollow space, cavity, or recess in bone; example is the maxillary____________

a bony wall or partition that divides 2 spaces or cavities. it may be present within the space of a fossa, or sinus. it appears radiopaque, in contrast to a space or cavity, which appears radiolucent. An example is the nasal___________

an immovable joint that represents a line of union between adjoining bones of the skull. On dental radiographs, it appears as a thin radiolucent line. An example is the median palatine_____________

Composed of 2 paired bones, but are often referred to as a single bone.

described as the architectural cornerstone of the face

All of the bones of the face articulate with the maxilla except what?

This forms the floor of the orbit of the eyes, the sides and floor of the nasal cavities, and the hard palate. It also supports the upper teeth

an opening or hole in the bone that is located at the midline of the anterior portion of the hard palate directly posterior to the maxillary central incisors

What nerve exits the maxilla through the incisive foramen?

how does the incisive foramen appear on a radiograph?

2 tiny openings or holes in bone that are located on the floor of the nasal cavity. They are the openings of 2 small canals that extend downward and medially from the floor of the nasal cavity. The canals join together to form the incisive canal and share a common exit, the incisive foramen.

What nerve exits the maxilla through the superior foramina, travels through the incisive canal, and exits at the incisive foramen?

What is the radiographic appearance of the superior foramina of the incisive canal?

the immovable joint between the two palatine processes of the maxilla. It extends from the alveolar bone between the maxillary central incisors to the posterior hard palate

How does the median palatine suture appear on a radiograph?

true or false. As the median palatine suture fuses with age, it may become less distinct radiographically

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

How does the lateral fossa appear on a radiograph?

a pear shaped compartment of bone located superior to the maxilla. The inferior portion is formed by the palatal processes of the maxilla and the horizontal of the palatine bones. The lateral walls of this are formed by the ethmoid bone, and the maxillae. And it is divided by a bony portion called the nasal septum

How does the nasal cavity appear on a radiograph?

A vertical bony wall or partition that divides the nasal cavity into the right and left nasal fossae. It is formed by the vomer bone and a portion of the ethmoid bone and cartilage

How does the nasal septum appear on a radiograph?

a bony wall formed by the palatal processes of the maxilla and the horizontal portions of the palatine bones. It is composed of dense cortical bone, and defines the inferior border of the nasal cavity

How does the floor of the nasal cavity appear on a radiograph?

a sharp projection of the maxilla located at the anterior and inferior portion of the nasal cavity

how does the anterior nasal spine appear on a radiograph?

wafer-thin, curved plates of bone that extend from the lateral walls of the nasal cavity. They are seen in the lower lateral portions of the nasal cavity.

How do the inferior nasal conchae appear on a radiograph?

paired cavities or compartments of bone located within the maxilla. They are located above the maxillary premolar and molar teeth. They rarely extend anteriorly beyond the canine

How large are the maxillary sinuses at birth? How big do they grow to become?

What do the maxillary sinuses appear like on a radiograph?

the floor of the maxillary sinus is composed of__________ ____________bone, and appears as a ___________line.

this may be seen within the maxillary sinus. They are bony walls or partitions that appear to divide the maxillary sinus in compartments

How do septa within the maxillary sinus appear?

may be seen within the maxillary sinus. They are tiny, tube-like passageways through bone that contain blood vessels and nerves that supply the maxillary teeth and interdental areas

How do nutrient canals within the maxillary sinus appear on a radiograph?

the intersection of the maxillary sinus and the nasal cavity as viewed on a dental radiograph

How does the inverted Y appear on a radiograph?

true or false. Both the lateral wall of the nasal cavity and the anterior border of the maxillary sinus are composed of dense cortical bone and appear as a radiopaque band.

Where is the inverted Y located?

a rounded prominence of bone that extends posterior to the third molar region. Blood vessels and nerves enter the maxilla in this region and supply the posterior teeth

How does the maxillary tuberosity appear on a radiograph?

a small hook-like projection of bone extending from the medial pterygoid plate of the sphenoid bone. It is located posterior to the maxillary tuberosity region

What does the hamulus appear like on a radiograph?

bony projection of the maxilla that articulates with the zygoma or malar (cheek) bone. composed of dense cortical bone

how does the zygomatic process appear on a radiograph?

cheek bone, malar or zygomatic bone, articulates with the zygomatic process of the maxilla. Composed of dense cortical bone

How does the zygoma appear on a radiograph?

What is the largest and strongest bone of the face?