W2: Rad- Teeth + Supporting Structures

Question 1

Question 2

Radio opaque vs Radiolucent

Answer 2

appear white bc absorbs
bone/enamel= white

RL= pulp= dark

Question 3

Layers of tooth

Answer 3

bone/enamel= white

cementum= no density bc very similar to dentine, so you cant see it on root, so similar to bone sometimes

Question 4

Types of Dentine can affect what

Answer 4

size of pulp reduces as person grows older, can see in x-ray

Question 5

What can DEJ be mistaken for

Answer 5

caries by mistake. bc of match band effect. (MBE)

e.g. in Q pic you see false greys… can happen in x-rays, sometimes amalgams have RL lines making MBE

Question 6

In young pt what can you see? vs older

Answer 6

root forming, RL area in root, progress in development… reduction in pulp bc dentine (secondary grows)

Question 7

After eruption how does it take for tooth root to form?

Answer 7

2-3 years after eruption, apex closes

Question 8

After eruption how does it take for tooth root to form?

Answer 8

2-3 years after eruption, apex closes

Question 9

age

Answer 9

10?
No 2nd molar: under 11

Question 10

Tooth is in alveolar bone, there is a dark area on gingival margin on xray, why so?

Answer 10

btw CEJ and crest of alveolar bone- not covered by bone or enamel but by gingiva.

neck of tooth is less dense compare to top/bottom. as xrays pass through, photos that cross neck they carry higher energy bc dense tissues abs photons so less photons reach film… can be mistaken for caries.

if less dense= more photons reach=white

Question 11

How to tell if it is cervical caries vs burnout?

Answer 11

root caries NEED BONE LOSS = need exposure of root surface, bone loss, ging recession, exposure, demin (is there bone loss?), extend doesnt follow CEJ/AB

burnout: spans CEJ and crest of AB (radioL spans that width)

Question 12

What does Lamina Dura look like?

Answer 12

• crest
• ROpaque line con with tooth onto adj tooth
• where tooth is moving, LD is thicker, moving mesial= thicker
• LD of distal 44 vs mesial= less obvious bc angulation of beam is diff.

Question 13

Comment on LD of 44…
Thicker lamina dura could mean what?

Answer 13

LD more visible mesially bc angle of beam

Thick: occlusal stress there

Question 14

Tooth moving mesially, what do you see

Answer 14

thick mesial Lamina dura

Question 15

After tooth loss what is visible?

Answer 15

Corticated bone persists after tooth gone. LD (edentulous)

Question 16

What is the radiographic appearance of PDL space?

Answer 16

Question 17

What is indicative of healthy PDL space?

Answer 17

-wide PDL space good

Question 18

What is alveolar crest used to assess and what is considered a health measurement from CEJ?

Answer 18

ACrest= used to assess PD

Acrest 1.5-2mm from CEJ

Question 19

Healthy crest (anterior vs posterior) vs PD (type of bone lost)

Answer 19

in post teeth wider contacts, AC is flatter
- ant= smaller contact so AC is pointy and sharper

IN PD= erosion of margin, horizontal loss of AC

Question 20

AC healthy vs not

Answer 20

Question 21

The alveolar crest is influenced by position of what? Why might it be angled?

Answer 21

tooth erupting

Question 22

where is cortical bone?

Answer 22

btw buccal/lingual or palaltal/ buccal

Question 23

diff btw bone max and mand

Answer 23

max= more vascular
mandibule= fewer trabaculae, walls thick

used to assess pulpal disease, jaw pathology, decrease in size of trabecullae

Question 24

What is condensing osteitis and how does it appear?

Answer 24

Condensing osteitis is a periapical inflammatory disease that results from a reaction to a dental related infection. This causes more bone production rather than bone destruction in the area. The lesion appears as a radiopacity in the periapical area hence the sclerotic reaction

Question 25

When inflammation, dilation of BV and blood supply to area can capture what?

Answer 25

can see PD nutrient canals. lil lines got to AC.