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Facial Bones

Chapter 21 Imported

QuestionAnswer
How many facial bones are there? 14
Name the facial bones: *Nasal bones *Lacrimal bones *Maxillaries *Zogomatic bones *Palatine bones *Inferior nasal concha *Vomer *Mandible
These 2 small, thin bones form the superior bony wall of the nasal cavity nasal bones
these articulate in the midsagittal plane, where at their posterosuperior surface they also articulate with the perpendicular plate of the ethmoid bone; they also articulate with the frontal bone above and with the maxillae at the sides nasal bones
the smallest bones in the skull lacrimal bones
these bones are situated at the anterior part of the medial wall of the orbits between the labyrinth of the ethmoid bone and the maxilla lacrimal bones
this is formed by the lacrimal bones and the maxilla and accommodates the lacrimal sacs lacrimal fossae
the tear ducts pass through this the lacrimal foramen
these articulate with the frontal and ethmoid cranial bones and the maxilla and inferior nasal concha facial bones each lacrimal bone
Which projections can the lacrimal bones be seen on? PA and lateral projections of the skull
the largest of the immovable bones of the face maxillary bones
these bones articulate with all other facial bones except the mandible and also articulate with the frontal and ethmoid bones of the cranium maxillary bones
these form part of the lateral walls and most of the floor of the nasal cavity, part of the floor of the orbital cavities, and 3/4 of the roof of the mouth maxillary bones
these articulate with the zygomatic bones and assist in the formation of the prominence of the cheeks zygomatic processes
a large pyramidal cavity which empties into the nasal cavity maxillary sinus
Where on the maxilla is the maxillary sinus located? on the body of each maxilla
located under each orbit and serves as a passage through which the infraorbital nerve and artery reach the nose infraorbital foramen
located at the inferior borders of the maxillae, a thick, spongy ridge which supports the roots of the teeth alveolar process
a pointed, forward-projecting process located in the anterior midsagittal plane at the junction of the maxillary bones anterior nasal spine
positioning landmark of the midpoint of the anterior nasal spine acanthion
these bones form the prominence of the cheeks and a part of the side wall and floor of the orbital cavities zygomatic bones
unites with the zygomatic process of the temporal bone to form the zygomatic arch temporal process
this is formed by the union of the temporal process of the zygomatic bone and the zygomatic process of the temporal bone zygomatic arch
these bones articulate with the frontal bone superiorly, with the zygomatic process of the temporal bone at the side, with maxilla anteriorly, and with the sphenoid bone posteriorly the zygomatic bones
L-shaped bones composed of vertical and horizontal plates palatine bones
these articulate with the maxillae to complete the posterior fourth of the bony palate, or roof of the mouth the horizontal plates of the palatine bones
these extend upward between the maxillae and the pterygoid processes of the sphenoid bone in the posterior nasal cavity the vertical portions of the palatine bones
these assist in forming the posteromedial bony orbit the superior tips of the vertical portions of the palatine bones
extend diagonally and inferiorly from the lateral walls of the nasal cavity at approximately its lower third the inferior nasal conchae
these are long, narrow, and extremely thin; they curl laterally, which gives them a scroll-like appearance the inferior nasal conchae
the upper two nasal conchae are processes of this bone the ethmoid bone
these project into and divide the lateral portion of the respective sides of the nasal cavity into superior, middle and inferior meatuses the three nasal conchae
covered with a mucous membrane to warm, moisten, and cleanse inhaled air inferior nasal conchae
a thin plate of bone situated in the midsagittal plane of the floor of the nasal cavity vomer
forms the inferior part of the nasal septum vomer
the largest and densest bone of the face mandible
this bone forms the prominence of the cheeks zygomatic bones
the smallest of the facial bones lacrimal
How many facial bones help make up the bony orbit? 4
the largest of the facial bones mandible
the total number of facial bones 14
For a lateral projection of the facial bones, the IR is centered to the_______ Zygomatic Bone
For the Waters method, the OML is placed at what degree angle to the IR? 37 degrees
This line is placed as nearly parallel to the IR as possible for the SMV projection of the zygomatic arches IOML
The _________ is centered to the IR for a parietoacanthial projection of the facial bones. Acanthion
For the tangential projection of the zygomatic arch the patients head is tilted approximately... 15 degrees away from the side being examined
Which facial bones help make up the orbits? *Maxilla *Zygoma *Lacrimal *Palatine
a curved horizontal portion of the mandible body
the two vertical portions of the mandible rami
positioning landmark at the angle of the mandible gonion
When does the fibrous symphysis of the mandible ossifie? during the first year of life
the most anterior and central part of the mandible symphysis
a triangular prominence at the end of the slight ridge of the symphysis mental protuberance
spongy bone located at the superior border of the body of the mandible which supports the roots of the teeth alveolar portion
a small opening on each side of the mandible for the transmission of nerves and blood vessels mental foramina
the broad surface of the mandible that is made up of the rami and body forms an angle of approximatley _____ 110 to 120 degrees
a concave area that separates the coronoid and condylar processes of the mandible mandibular notch
the anterior process of the mandible that is thin and tapered and projects to a higher level than the posterior process coronoid process
articulates with the mandibular fossa of the temporal bone condylar process
this articulation slants posteriorly approx. 15 degrees and inferiorly and medially approximately 15 degrees TMJ
situated immediately in front of the EAM TMJ
a small, U-shaped structure situated at the base of the tongue, where it is held in position in part by the stylohyoid ligaments extending form the styloid processes of the temporal bones hyoid bone
the only bone in the body that does not articulate with any other bone hyoid bone
divided into a body, two greater cornua, and two lesser cornua hyoid bone
serves as an attachment for certain muscles of the larynx and tongue and is easily palpated just above the larynx hyoid bone
How many bones compose each orbit? 7
How many facial bones compose the orbits? 4
Name the facial bones that compose the orbits? *Maxilla *Palatine *Zygomatic *Lacrimal
Which 3 bones compose the circumference of the orbit? *Frontal *Zygoma *Maxilla
The articulations of the facial bones are classified as: fibrous gomphoses
The TMJ articulation is classified as: a synovial joint of both the hinge and gliding type
True or False: Facial bone studies should be performed erect whenever possible. True
True or False: A LeForte fracture produces a "free-floating" zygomatic bone. False
The majority of the hard palate is formed by: Maxilla
Which facial bones form the posterior aspect of the hard palate? Horizontal portion of the palatine
Which 2 cranial bones articulate with the maxilla? frontal & ethmoid
True or False: The majority of the nose is formed by the right and left nasal bones. False
True or False: A grid is not required for the oblique inferosuperior (tangential) projection for zygomatic arches. True
Which positioning line should be perpendicular to the IR for the Rhese method projections to optic foramina? AML
For the lateral projection of the facial bones, which line is parallel with the transverse axis of the IR? IOML
What size & in what position is the IR for the lateral projection of the facial bones? 8 x 10 lengthwise
What does the lateral projection of the facial bones demonstrate? a lateral image of the bones of the face, with the right and left sides superimposed
What size & in what position is the IR for the parietoacanthial Waters method? 8 x 10 lengthwise
The OML forms a _____degree angle with the plane of the IR for the Waters method projection. 37 degree
About how far away from the grid device with the average patient's nose be from the grid device? about 3/4 inch
The _______ is centered to the IR for a parietoacanthial projection of the facial bones. acanthion
What does the Waters method demonstrate? the orbits, maxillae and zygomatic arches
Where are the petrous ridges projected in a Waters method projection? immediately below the maxillary sinuses
sometimes called a "shallow" Waters, it actually increases the angulation of the OML by placing it more perpendicular to the plane of the IR Modified Waters method
On which part of the body does the patient's head rest when performing a parietoacanthial Waters method projection? on the tip of the extended chin
For a Modified Waters projection, the OML is adjusted to form a _____ angle with the plane of the IR. 55 degree
Where are the petrous ridges projected in a Modified Waters projection? immediately below the inferior border of the orbits at a level midway through the maxillary sinuses
The Modified Waters method is a good projection to demonstrate this type of fracture. blowout fractures
What size & in what position is the IR for the acanthioparietal Reverse Waters method? 24 x 30 cm lengthwise
Created by: foster1317
 

 



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