Maxillary Intraoral Anatomy Flashcards
The radiographic recognition of
disease, requires a sound knowledge of the ___________ appearance of normal structures
radiographic
What is the lamina dura?
The teeth sockets are bounded by a thin radiopaque layer of dense bone
The teeth sockets are bounded by a thin radiopaque layer of dense bone called…
lamina dura
Why does the lamina dura look more radiopaque?
tooth is constantly pulling on it (causing stimulus)
What are the parts of the tooth?
lamina dura
lamina dura
What is the PDL space?
space between the root of the tooth and the lamina dura
What is the part of bone that is attached to the cementum by fibers?
lamina dura
What is the lamina dura continuous with?
alveolar crest
List the parts of the tooth from the most radiopaque to least?
enamel, dentin, pulp
What is the alveolar crest?
Is the gingival margin of the alveolar
process between teeth (radiopaque line)
What is the gingival margin of the alveolar process between teeth?
alveolar crest
alveolar crest
The alveolar crests (arrows) are seen as _______ borders of the alveolar bone
cortical
What do we want to see on the radiograph?
1-2 millimeters between alveolar crest and CEJ is healthy
alveolar crest
What is the periodontal ligament space?
It appears as a radiolucent space between the tooth root and the lamina dura.
What appears as a radiolucent space between the tooth root and the lamina dura?
periodontal ligament space
periodontal ligament space
periodontal ligament space
double periodontal ligament space
Why can you see a double PDL space sometimes?
A double periodontal ligament space and lamina dura may be seen when there is a convexity of the proximal surface of the root resulting in two heights of contour
What is another name for cancellous bone?
trabecular bone
The __________ bone lies between the cortical plates in both jaws
cancellous
Inside the trabeculation there is a ___________ space
medullary (for blood vessels, nerves, etc.)
marrow spaces (medullary space)
trabecular plates
What bone usually at or just below the junction of the inferior end of the nasal septum and the inferior outline of the nasal aperture
Anterior Nasal Spine
Where is the anterior nasal spine?
It is usually at or just below the junction of the inferior end of the nasal septum and the inferior outline of the nasal aperture.
anterior nasal spine
anterior nasal spine
What is in red?
septum
What is in yellow?
floor of the nasal cavity
What is in green?
anterior nasal spine
anterior nasal spine
anterior nasal spine
anterior nasal spine
What is the intermaxillary suture?
Extends from alveolar crest between #8 and #9 posteriorly to distal aspect of hard palate
What extends from alveolar crest between #8 and #9 posteriorly to distal aspect of hard palate?
intermaxillary suture
What is another name for the intermaxillary suture?
median suture
Is the intermaxillary suture radiolucent or radiopaque?
radiolucent
intermaxillary suture
intermaxillary suture
intermaxillary suture
intermaxillary suture
intermaxillary suture
intermaxillary suture
What is the nasopalatine canal?
▪ Transmits nasopalatine nerves and vessels
▪ Terminates in incisive foramen
Nasopalatine canal
What is the entrance foramine for the nasopalatine canal?
two usually round or oval foramina in the floor of the nasal cavity
superior foramina of the nasopalatine canal
nasopalatine canal
nasopalatine canal
superior foramina of the nasopalatine canal
nasopalatine canal
nasopalatine canal
What are the green arrows?
nasopalatine canal
nasopalatine canal
What is the green?
nasopalatine canal
What is the yellow?
incisive foramen
What is the incisive foramen?
the oral end of the nasopalatine canal
incisive foramen
incisive foramen
The incisive foramen appears as an ovoid _____________ between the roots of the central incisors
radiolucency
incisive foramen
incisive foramen
incisive foramen
What is the nasal cavity?
▪ Is located above the oral cavity
▪Its floor is seen as a thin radiopaque line
nasal cavity
floor of the nasal cavity
What is blue?
inverted y (switch from nasal cavity to maxillary sinus)
What is yellow?
maxillary sinus
What is white arrows?
floor of the nasal cavity
floor of the nasal cavity
floor of the nasal cavity
floor of maxillary sinus
How can you tell the difference between floor maxillary sinus and floor of nasal cavity?
*nasal cavity - straight line (by premolars)
*maxillary sinus - wavey line (by molars)
What is yellow?
inverted y
What is light blue?
floor of maxillary sinus
What is dark blue/navy?
floor of nasal cavity
inferior nasal cocha/turbinate
Green arrows
inferior concha
nasal septum
What is the maxillary sinus?
▪ Is an air-containing cavity lined with mucous membrane.
▪ The borders appear in periapical radiographs as a thin and radiopaque line.
maxillary sinus
What is red?
floor of the nasal cavity
maxillary sinus floor
The inferior border of the _________ ______ appears as a thin radiopaque line near the apices of the maxillary premolars and molars.
maxillary sinus
maxillary sinus
maxillary sinus
The floor of the maxillary sinus (arrows) often extends toward the crest of the alveolar ridge in response to…
missing teeth
septum in the maxillary sinus
neurovascular canals in the wall of the maxillary sinus
What is the inverted y?
Formed by nasal fossa and maxillary sinus
inverted y
What is the soft tissue of the tip of the nose can be seen in projections of the maxillary incisors, superimposed over the roots?
Nose
nose
nose
nose
nose
What is the lateral fossa?
A depression in the maxilla near the apex of the lateral incisor.
lateral fossa
lateral fossa
The lateral fossa is a diffuse radiolucency in the region of the…
lateral incisor
lateral fossa
lateral fossa
What is the nasolacrimal canal?
Runs from the orbit inferiorly to the nasal cavity.
nasolacrimal canal
nasolacrimal canal
The nasolacrimal canals are commonly seen as ovoid _____________ on maxillary occlusal projections.
radiolucencies
Nasolacrimal canal is occasionally seen near the apex of the _________
when steep vertical angulation is used
canine
What is the zygomatic process of the maxilla?
The zygomatic process of the maxilla is an extension of the lateral maxillary surface that articulates with the maxillary process of the zygoma.
ZYGOMATIC PROCESS OF THE MAXILLA
zygomatic process of the maxilla
zygomatic process of the maxilla
White arrows
zygomatic process of maxilla
Blue line
floor of maxillary sinus
Red line
tuberosity
Yellow line
floor of the nasal cavity
zygoma
What is the nasolabial fold?
Radiographically is an oblique line demarcating a region that appears to be covered by a veil of slight radiopacity
nasolabial fold
nasolabial fold
The nasolabial soft tissue fold extends across the __________ region.
canine-premolar
tuberosity
tuberosity
What are the pterygoid plates and hamular notch?
The medial and lateral pterygoid plates lie immediately posterior to the tuberosity of the maxilla.
hamular notch/process
hamular notch
pterygoid plates
hamular process
