intraoral radiographic anatomy e lecture

Question 1

what does radiolucency mean

Answer 1

object allows a lot of x rays to pass through it
maybe because its thin or made from non calcified tissues- then interacts with the x ray and is shown as dark on the film

Question 2

what does radiopacity mean

Answer 2

due to an objects density or fitness x rays cannot reach the film and therefore seen as pale or white

Question 3

if an object is radiopaque what does that mean

Answer 3

it is radio dense

Question 4

where does the inter maxillary suture lie

Answer 4

upper ant PA( periapical) , the anode structure is a thin radiolucent line in the midline

Question 5

where and how does the anterior nasal spine look

Answer 5

appears as a radiopaque v shaped line above the midline above the apices of the incisors

Question 6

what can soft tissues do to the radiograph

Answer 6

they can create a shadow meaning they are superimposed on the image

Question 7

how many openings are there to the pyriform fossa from the nasal end

Answer 7

2

Question 8

how many openings are there to the pyriform fossa from the oral end

Answer 8

1

Question 9

how does the nasal end look on a bisecting angle PA

Answer 9

it looks like two ovoid radiolucent structures just at the tip of the nasal spine

Question 10

what might the nasal spine also look like

Answer 10

it might also look like a concavity next to the base of the nasal septum

Question 11

what can the incisive canal develop

Answer 11

it can develop cysts

Question 12

clinically what can be the issue with the incisive e foramen in the oral end

Answer 12

it can be projected over the apex of the tooth and can be mistaken for an inflammatory cyst

Question 13

what does the oral end of the incisive foramen look like

Answer 13

there is a single radiolucency

Question 14

what does the nasal septum look like

Answer 14

a radiopaque line

Question 15

what lies either side of the nasal septum

Answer 15

the ant parts of the pyriform fossa

Question 16

what is the nasal cavity also known as

Answer 16

the pyriform fossa

Question 17

what does the inf concha look like

Answer 17

the bone is thin but mucous can be thick

Question 18

what does he radiograph of the inf concha look like

Answer 18

a smooth rounded opacity due to the thick layer of mucous

Question 19

which turbinate is shown on the radiograph

Answer 19

the inf nasal concha

Question 20

why is only the inf nasal concha shown

Answer 20

as it is the largest and due to its position

Question 21

what dos the canine fossa look like

Answer 21

less bone so less tissue therefore more radiolucency and poorly defined

Question 22

how does the maxillary sinus look on a radiograph

Answer 22

it is radiolucent

Question 23

what is another name for the maxillary sinus

Answer 23

the maxillary antrum

Question 24

clinically what can the maxillary sinus be mistaken as

Answer 24

as a cyst

Question 25

what is the Y line of ennis

Answer 25

An anatomical landmark created by the superimposition of the floor of the nasal cavity and the border of the maxillary sinus.

Question 26

what does the y line of ennis depict

Answer 26

It shows that the leg of the y is the laternal side of the nose which is also the medial wall of the antrum

Question 27

what does one prong of the y show

Answer 27

that it is the floor of the nose(pyriform fossa) and the other prong is the floor of the antrum

Question 28

what does the floor of the nose look like on an occlusal or post PA

Answer 28

flat horizontal radiopaque line

Question 29

what other soft tissue can be shown on a radiograph

Answer 29

a subtle line down at an angle- the nasolabial fold

Question 30

how does the antrum look on a radiograph

Answer 30

undulating radiopaque line which can come as forward as the canine

Question 31

what can be found within the antrum

Answer 31

septi can be found which are shown as radiopaque lines

Question 32

which three structures are close in relationship q

Answer 32

the nose the zygomatic buttress and the antrum

Question 33

what can be seen above the UR 5,6,7,8

Answer 33

we see the undulating antrum but also radiodensity

Question 34

why do we see radiodensity near the UR 5,6,7,8

Answer 34

due to the zygoma, cheekbone or the malar bone

Question 35

what is it called where the zygoma meets the maxilla

Answer 35

it is known as the buttress

Question 36

what is the cheekbone also known as

Answer 36

the zygoma and the malar bone

Question 37

what does the lateral view of the skull show

Answer 37

the relationship between the maxilla, the zygoma and the pterygoid plates

Question 38

what is the hamulus part of

Answer 38

the medial pterygoid plate

Question 39

what is part of the medial pterygoid plate

Answer 39

the hamulus

Question 40

clinically what is important of the hamular notch

Answer 40

we should consider when making a denture to extend the denture into the hamular notch as this is where soft tissue can give slightly

Question 41

what is the maxillary tuberosity

Answer 41

it is the bone related to the last molar and just posterior to it

Question 42

which bone is posterior to the last molar

Answer 42

the maxillary tuberosity

Question 43

what can be seen near the maxillary tuberosity

Answer 43

soft tissues

Question 44

which process of the bone can create a shadow when taking a PA

Answer 44

the coronoid process of the mandible can sometimes be seen taking radiographs of the post maxillary teeth PAs

Question 45

what is the nasal septum seen as on a ant occlusal PA

Answer 45

a vertical radiopaque line

Question 46

when looking at an upside down occlusal view of the maxilla we can see two similar radiolucent structures what are they

Answer 46

the tearducts or nasal lacrimal ducts

Question 47

why is it not the greater palatine fossa

Answer 47

the x ray doesnt pass through that way and we would deffo choke the patient trying to get that x ray

Question 48

what would neurovascular channels look like on an x ray

Answer 48

tiny circular radiolucencies

Question 49

what does the neurovascular channels supply

Answer 49

the blood and nerve supply to the teeth

Question 50

what is an important branch of the maxillary division of the trigeminal nerve

Answer 50

the middle or posterior superior alveolar nerve

Question 51

which CN is the trigeminal nerve

Answer 51

CN V

Question 52

what can we see from the lingual aspect of the midline

Answer 52

thicker area of bone radiopaque the bone has ridges where muscle attaches- genial tubercule- and the genioglossus and genial hyoid muscle attaches small foramen- the lingual foramen

Question 53

why does the bone have ridges

Answer 53

where muscle can attach -the genial tubercle

Question 54

which muscles attach to the genial tubercle

Answer 54

the genioglossus and the genial hyoid muscle

Question 55

there is also a small foramen on the lingual aspect of the mandible

Answer 55

what is it | the lingual foramen

Question 56

what nerve supplies the mandible

Answer 56

the inf alveolar nerve

Question 57

what is the pathway of the inf alveolar nerve

Answer 57

passes along a bony canal where it reaches the premolar region and splits to the mental nerve via mental foramen and the incisive nerve via the incisive foramen

Question 58

clinically what can be the issue with the inf alveolar nerve

Answer 58

it can be superimposed over a root and mistaken as pathology

Question 59

how are caries seen on x rays

Answer 59

radiolucencies

Question 60

what lies inferiorly to the mylohyoid ridge

Answer 60

the submandibular fossa

Question 61

how does the the submandibular fossa look

Answer 61

relative radiolucency due to the thicker mylohyoid ridge above it also because it is thinner

Question 62

what lies in the submandibular fossa

Answer 62

the submandibular gland

Question 63

what is the shape of the submandibular gland

Answer 63

it lies in the submandibular fossa and then works round posteriorly to the mylohyoid muscle

Question 64

what is another name for the chin

Answer 64

the mental protuberance

Question 65

how does the chin show up in the x ray

Answer 65

as a radiodensity on the labial aspect of the ant part of the teeth slide 64

Question 66

what tissues can be shown on the lingual aspect

Answer 66

the soft tissues such as the tongue