Lecture 6 (9/26)

Question 1

Traditional radiography we are looking at a _____ dimensional picture for a ______ dimensional situation

Answer 1

2D; 3D

Question 2

A CBCT will show you a _______ image

Answer 2

3D

Question 3

A static 2-dimensional shadow of a dynamic 3-dimensional situation

Answer 3

Traditional radiograph

Question 4

Type of image that is a “snapshot in time”:

Answer 4

Radiograph

Question 5

Ideally if we are going to do endodontic therapy we want a radiograph that is:

Answer 5

Exposed the day of treatment (although not 100% necessary)

Question 6

Because a radiograph is only a 2D image, it is subject to:

Answer 6

Distortions and false interpretations

Question 7

As long as there is no periaplical lesions we need to see _____mm of bone beyond the apex

If there is a periapical lesion we need to see:

Answer 7

2-3mm; all of the lesion

Question 8

If the radiograph does not appear right, you should consider:

Answer 8

a better angulation

Question 9

________ to the area of concern are paramount in helping to determine a correct diagnosis

Answer 9

Optimization of image quality and relationship

Question 10

Optimization of image quality and relationship to the area of concern are paramount in helping to determine a correct:

Answer 10

Diagnosis

Question 11

If your radiograph was taken before the patient had symptoms you should:

Answer 11

take a new radiograph

Question 12

If your radiograph was taken before the patient had some operative work done you should:

Answer 12

take a new radiograph

Question 13

old radiographs can be very useful, such as:

Answer 13

Viewing changes that occur

Question 14

Diagnostic radiograph must be _____ and include all of the ares of concern in proper orientation without cone cuts, overlapping, elongation or foreshortening.

Answer 14

Distinct

Question 15

Diagnostic radiographs must be distinct and include:

Answer 15

All of the areas of concerns in proper orientation

Question 16

What diagnostic radiographs are required for all posterior teeth?

Answer 16

2 PA radiographs (straight-on & 20 degree H. angled)

Question 17

When taking a diagnostic radiograph, its always a good ideal to take _____ to help _____

Answer 17

multiple angles; guess the 3D anatomy

Question 18

Are your radiographs current? Think of all the ____ of a ____ pulpal-periodontal environment to a _____ state. You swill see most of these changes.

Answer 18

stages; healthy; diseased

Question 19

What does a 5-year old sloppy x-ray tell you?

Answer 19

To take current radiographs

Question 20

A current radiograph

Answer 20

1-2 months; Unless something has changed

Question 21

NEVER EVER EVER try to make a diagnosis:

Answer 21

from 1 radiograph

Question 22

The radiograph is a _____ that helps us arrive at a _____. But it is not _____.

Answer 22

Tool, diagnosis; NOT THE ONLY TOOL

Question 23

A drop-off perio pocket or a DST could indicate:

Answer 23

a new vertical root frature

Question 24

A new vertical root fracture could be indicated by:

Answer 24

a drop-off perio pocket or DST

Question 25

Do radiographs have historical value?

Answer 25

Yes- allows you to visualize change over time

Question 26

A series of radiographs over time with similar angulation and exposure can be very helpful when following:

Answer 26

a new developing lesion or healing lesion

Question 27

Benefits of endodontic radiology include: (4)

Answer 27

1. Suggest LEOs & other pathosis 2. May indicate unseen canals & proximal anatomy 3. Largely locates most curvatures 4. Assists in working-length determination

Question 28

When you see a canal "disappear on a radiograph" this shows us:

Answer 28

The canal splits at that point and becomes two canals (AKA a fast break)

Question 29

When you look at lower first premolars 24% of the time you will see a _____ canal system and this indicates this is likely _______ (Double check this info)

Answer 29

Type IV (canal disappears I think); a case you need to refer

Question 30

Mesio-distal curvatures are _____ to see Buccal-lingual curvatures are _____ to see (on radiographic images)

Answer 30

Easy; harder

Question 31

Bullseye suggest that:

Answer 31

The root takes a 90 degree curve- very difficult to treat these cases! REFER REFER REFER

Question 32

If a canal disappears this may be called a ____ meaning the canal has ____. This is significant for ____ You probably want to ___ these cases

Answer 32

Fast break; split; lower first premolars; refer

Question 33

Benefits of endodontic radiology: Suggests ____ and other _____

Answer 33

LEOs and other pathosis

Question 34

We want our working length and obturation to be _____ short, where the canal exits the root

Answer 34

1mm

Question 35

Benefits of endodontic radiology: May indicate ___ and _____

Answer 35

Unseen canals and proximal anatomy

Question 36

Benefits of endodontic radiology: Largely locates most:

Answer 36

Curvatures

Question 37

Benefits of endodontic radiology: Assists in ______ determination

Answer 37

working-length

Question 38

Changes of horizontal angulation = _____

Answer 38

"SLOB" rule

Question 39

Modern diagnostic Digital radiographs is _____ when appropriate radiation hygiene techniques are employed

Answer 39

without risk

Question 40

The lingual canal will move the _____ direction as the shift shot. The buccal canal is going to appear to move the ______ direction of the shift shot.

Answer 40

Same; Opposite (line up pointer fingers - one infront of the other infront of face, if you move you head to the left/right, it appears the finger in the back is moving in the same direction as your head- this represents the lingual-palatal root)

Question 41

There should be _____ about x-ray safety for adequate diagnostic/TX purposes

Answer 41

No question

Question 42

Radiographs helps to develop a:

Answer 42

Mental image

Question 43

Risks of endodontic radiology: Many opportunities exist for ____ and ____

Answer 43

Confusion; inaccurate interpretation

Question 44

Risks of endodontic radiology: Results can be ____ leading to ____

Answer 44

Inaccurate diagnosis; incorrect treatment

Question 45

A risk of endodontic radiology is that results can be inaccurate leading to incorrect treatment, because of this, its extremely important to:

Answer 45

Avoid making diagnose solely off radiograph

Question 46

A risk of endodontic radiology is that results can be inaccurate leading to incorrect treatment, because of this, its extremely important to evaluate for: (3)

Answer 46

1. artifacts 2. poor resolution 3. wrong angle

Question 47

What are the three biggest risks of endodontic radiology?

Answer 47

1. attempting to diagnose from radiographs alone 2. seeing something on film that is not there 3. failing to see something on the film that is there

Question 48

Unless you like spending time and money in court: (its a saying)

Answer 48

Errors of commission = errors of omission

Question 49

______ curvatures are more easily noticed than ______

Answer 49

Mesio-distal; buco-lingual

Question 50

When you see a _____ on an image, you are seeing facial or lingual root tip "on end". You don't know if it curves to the facial or lingual (good opportunity to refer)

Answer 50

Bullseye

Question 51

When you see a bullseye, you are seeing a ___ or ____ ____; you don't know if it curves to the _____ or _____

Answer 51

Facial or lingual root tip; facial or lingual

Question 52

When you see a bullseye on an image, its a good idea to:

Answer 52

Refer

Question 53

This image shows an example of:

Answer 53

Bullseye

Question 54

This 4th (disto-lingual) root is seen most frequently in ______ and ______ populations

Answer 54

Native American; asian

Question 55

What kind of root is seen most frequently in Native American and asian populations?

Answer 55

4th disto-lingual root

Question 56

Often the disto-lingual root and canal curve sharply to the _____ to present this classic appearance

Answer 56

facial

Question 57

The 4th (disto-lingual) root is seen most frequently in Native American and asian populations. Often the D-L root and canal curve sharply to the facial to present this classic appearance. This information can be of great value to the operator in being able to _______ to ______

Answer 57

visualize the unusual anatomy; avoid misadventures

Question 58

A distal shift shot on #30 will make the ML root appear to move:

Answer 58

Distal to the MB root

Question 59

Which of the following is not necessary for quality diagnostic routine endodontic films?

Answer 59

Panorex (ALL posterior teeth require 2 P/A radiographs straight on and 20 degrees horizontal angle & a BW)