Endo Radiology

Question 1

Is an x ray a 2d or 3d image?

Answer 1

2d

Question 2

How many PA radiogragphs should be taken on posterior teeth for endo?

Answer 2

2
1 normal PA
1 20 degree angled

Question 3

If deep caries are suspected on a posterior tooth needing endo, what radiograph should you take to confirm extent of caries

Answer 3

Bitewing

Question 4

What 2 things should radiographs be for endo?

Answer 4

Current

Diagnostic

Question 5

How long is considered current for a radiograph if there is no change?

Answer 5

1-2 months

Question 6

Benefits of \_\_\_\_\_\_\_
•Suggests LEOs & other Patholosis
•May Indicate Unseen Canals & Proximal Anatomy
•Largely locates most curvatures
•Assists in Working-Length Determination

Answer 6

Endo radiographs

Question 7

Is there much risk in radiographic endo?

Answer 7

Not much

Question 8

What are the 3 biggest risks of endodontic radiology?

Answer 8

Attempting to DIAGNOSE from RADIOGRAPHS ALONE
Seeing SOMETHING on the FILM that is NOT THERE
FAILING TO SEE SOMETHING on the FILM that IS THERE

Question 9

When you see a ______ on an image, you are seeing a facial or lingual root tip on end. You don’t know if it curves to the facial or lingual

Answer 9

Bullseye

Question 10

The _____ on the mandibular molars are most frequently seen in NA and asian poplulations. Often the D-L root and canal curve sharply to present this classic appearance

Answer 10

3rd root

Question 11

We want to work and fill at ____. short of the canal exit in most cases.

Answer 11

1.0 mm

Question 12

How should you be able to tell which canal is which in a radiograph?

Answer 12

Take 2 radiographs one straight on and one shift shot

Question 13

If the x ray tube is shifted mesially, the buccal root will move which way?

Answer 13

Distally

Question 14

If the x ray tube is shifted mesially, the lingual root will move which way?

Answer 14

Mesially

Question 15

What is the most commonly retreated endo tooth?

Answer 15

Max 1st molar

Question 16

T/F: A radiolucency of endodontic origin is often BUT not always associated with a pulpal DX of necrotic pulp.

Answer 16

True

Question 17

What is a tell tale sign for VRF?

Answer 17

J shaped bone loss

Question 18

If there is a HRF, is there mobility?

Answer 18

yes

Question 19

A distinguishing characteristic of a radiographic LEO is the at the radiolucency _____ at the apex regardless of cone angulation

Answer 19

Stay

Question 20

Are all PA radiolucencies are of endodontic orgin?

Answer 20

No

Question 21

The _____ is often superimposed on maxillary posterior apices. Do not be fooled!

Answer 21

maxillary sinus

Question 22

Is pathology usually bilateral and symmetircal?

Answer 22

No

Question 23

The ______ are often superimposed on the central and lateral apices (especially when a high bisecting angle technique is used)

Answer 23

nasal cavities

Question 24

If radiolucent area moves _______ the apex on multiple films, it is NOT associated with the apex and therefore is probably NOT a P/A lesion.

Answer 24

AWAY FROM

Question 25

Possibly the most common Anatomical Landmark to be confused w LEO*

Answer 25

Mental foramen

Question 26

If radiolucent area moves ____ the apex on multiple angled films, it is associated with the apex and therefore is probably a P/A lesion.

Answer 26

WITH

Question 27

May be asymptomatic OR: 
may mimic symptoms of SAP or AAA
(CC = pain, swelling, palpation +, perc++????). 
Lesion is NOT generally at apex.
•PT’s =vital pulp VIP!
•LD may or may not be intact
•No restorations or clinical aberrations . . . CAUSE??•Etiology=infected perio. Pocket
–If it is able to drain = asymptomatic
–If unable to drain = symptomatic

Answer 27

Lateral Periodontal cyst

Question 28

A dysplastic, rather than pathologic or inflammatory condition.
Characteristics:
*All teeth were vital and asymptomatic
Radiolucent vs radiopaque (mixed)

Answer 28

Periapical Cemental Osseous Dysplasia (PCOD)

Question 29

______ is a benign intraosseous lesion found in the anterior of the maxilla and the mandible in younger people (before age 20). It is characterized by large lesions that expand the cortical plate and can resorb roots and move teeth. It is composed of multi-nucleated giant cells. It has a slight predilection for females.Radiographically it appears as multilocular radiolucencies of bone.

Answer 29

Central Giant Cell Granuloma

Question 30

_______
•Causes “spiking”&resorptionof roots
•Poorly defined borders of lesion
•Loosening of teeth
•Pulps may still be vital
•Symptoms of neoplasia, esp in mandible—may be pain as well as paresthesia
•VIP lesion is usually ragged and asymmetrical!•REFER STAT

Answer 30

Metastatic Breast CA