Radiographs 10/25/16

Question 1

T/F

The angle of the radiograph can raise or lower the appearance of the alveolar crest.

Answer 1

True

Question 2

How do you determine if bone loss is horizontal or vertical?

Answer 2

Whether the bone is parallel to the CEJ or not

Question 3

If the bone is parallel to the CEJ is it horizontal or vertical?

Answer 3

Horizontal

Question 4

What area do you see between adjacent roots of teeth?

Answer 4

Interdental septa

Question 5

T/F

The normal interdental septa is radiographically thick

Answer 5

False

It is normally radiographically thing

Question 6

What is the radiopaque line that continues apically as alveolar bone proper?

Answer 6

Lamina Dura

Question 7

What histological feature can you find in the lamina dura?

Answer 7

Rest of Mallaze

Question 8

What is the space between the lamina dura and the root of the tooth?

Answer 8

Periodontal ligament space

Question 9

Is lamina dura as dense as it looks in a radiograph?

Answer 9

No

Question 10

T/F

The lamina dura is a radiographic artifact

Answer 10

True

Question 11

What should the shape of the interdental septum follow?

Answer 11

The parallel line with the between CEJs

Question 12

T/F

The level of the alveolar bone crest can drop during orthodontic treatment

Answer 12

True

Question 13

How far should it be from the CEJ to the crest of the bone?

Answer 13

1.5 to 2 mm

Question 14

What does the free gingival groove approximate?

Answer 14

Where the level of the Junctional epithelium is at

Question 15

Does a gingival sulcus mean health or unhealthy?

Answer 15

health

Question 16

What is the term for the gingival sulcus if the patient is no longer in full oral health?

Answer 16

Gingival pocket

Question 17

How does the periodontal ligament space appear on a radiograph?

Answer 17

Thin radiolucent line between root and the radiopaque line outlining the root

Question 18

What can widening of the periodontal ligament be a sign of?

Answer 18

• Occlusal trauma
• Vertical root fractures
• Scleroderma

Question 19

What would the tooth fill like clinically if the periodontal ligament is widened?

Answer 19

Loose

Question 20

What is the thickness of the PDL?

Answer 20

.1-.25mm

or 250 microns

Question 21

When is the PDL the widest?

Answer 21

During heavy occlusion

Question 22

When is the PDL thinnest?

Answer 22

In nonfunctional teeth

Question 23

T/F

As a general rule bone loss is generally less than it appears in the radiographs.

Answer 23

False

It is generally greater

Question 24

What percentage of bone mineral density is lost before it is detected radiographically?

Answer 24

30%

Question 25

What is the most important thing in regrowing bone?

Answer 25

stabilization of the blood clot

Question 26

T/F | Radiographs show amount of bone remaining rather than amount lost

Answer 26

True

Question 27

T/F | You can see the depth of the crater of bone loss from a radiograph

Answer 27

False | you can not see the depth it needs to be probed

Question 28

T/F | You CAN NOT see facial and lingual bone loss

Answer 28

True

Question 29

Does the presence of the lamina dura suggest that you have active disease?

Answer 29

No, the lamina dura is just an artifactual piece in the radiograph

Question 30

If you have little or no bone loss on a contiguous tooth, but a funnel shaped bone loss on the tooth what type of bone loss do you have?

Answer 30

Vertical bone loss

Question 31

IF you have bone loss in a localized area what is that suggestive of?

Answer 31

Localized damage/factor

Question 32

Loss of bone in the mesial and distal furcations of maxillary molars may present as a what?

Answer 32

Furcation arrow

Question 33

What is a tooth anomaly in the furcation area that can lead to bone loss?

Answer 33

Cervical Enamel pearl

Question 34

T/F | Connective tissue attaches onto enamel

Answer 34

False | It does not attach to enamel

Question 35

How much space does bone need to grow?

Answer 35

1 mm to 1.5 mm

Question 36

What can happen if you have a very close proximity of tooth roots?

Answer 36

- Bone loss | - Periodontal destruction

Question 37

T/F | The absence of radiographic calculus means that calculus is not there

Answer 37

False

Question 38

T/F | Calculus can give you a false probing depth if you hit it

Answer 38

True

Question 39

What is periodontal abscess?

Answer 39

Localized collections of pus

Question 40

What are three features of aggressive periodontitis?

Answer 40

- Rapid attachment loss - Minimal local factors - Genetics