Lecture 6 (9/26) Flashcards
A CBCT will show you a ___ image
3D
Traditional radiography we are looking at a ___ picture for a ____ dimensional situation
2D; 3D
A static 2-dimensional shadow of a dynamic 3-dimensional situation:
traditional radiograph
Type of image that is a snapshot in time:
radiograph
Ideally if we are going to do endodontic therapy we want a radiograph that is
exposed the day of treatment (although not 100% necessary)
Because a radiograph is only a 2D image, it is subject to:
distoration
As long as there is no periapical lesions we need to see ____ mm of bone beyond the apex
If there is a periapical lesion we need to see:
2-3mm; all of the lesion
If the radiograph does not appear right, you should consider:
better angulation
______ to the area of concern are paramount in helping to determine a correct diagnosis
optimization of image quality and relationship
Optimization of image quality and relationship to the area of concern are paramount in helping to determine a correct:
diagnosis
If your radiograph was taken before the patient had symptoms you should:
take a new radiograph
If your radiograph was taken before the patient had some operative work done you should:
take a new radiograph
Old radiographs can be very useful, such as:
viewing changes that occur
Diagnostic radiographs must be ___ and include all of the areas of concern in proper orientation without cone cuts, overlapping, elongation or foreshortening. Must include all the tooth and at least ____ mm apical to the end of the root
distinct; 5mm
Diagnostic radiographs must be distinct and include:
all areas of concern and proper orientation
What diagnostic radiographs are required for all posterior teeth?
2 P/A radiographs (straight on and 20 degree H. angled)
When taking diagnostic radiographs, its always a good idea to take ____ to help ____
multiple angles; guess the 3D anatomy
Are your radiographs current? Think of all the ____ of a ___ pulpal-periodontal environment to a ____ state. You will see most of these stages.
stages; healthy; diseased
What does a 5 year old sloppy x-ray tell you?
To take current radiographs
A current radiograph is one that has been taken:
within 1-2 months, unless something has changed
NEVER EVER EVER try to make your diagnosis:
from 1 radiograph alone
The radiograph is a _____ that helps us arrive at a ____. But it is not _____.
tool; diagnosis; NOT THE ONLY TOOL
Why must a radiograph be current?
people change and situations change
A drop-ff perio pocket or a DST could indicate:
a new vertical root fracture
Do radiographs have historical value?
Yes- allows you to visualize change over time
A series of radiographs over time with similar angulation and exposure can be very helpful when following:
a new, developing, or healing lesion
Benefits of endodontic radiology include: (4)
- Suggests LEOs & other pathosis
- May indicate unseen canals & proximal anatomy
- Largely locates most curvatures
- Assists in working-length determination
Canals don’t calcify from the ___ to the ____, its the other way around
apex to the chamber
If a canal disappears this may be called a _____ meaning the canal has _____.
This is significant for ______
You probably want to ____ these cases
fast break; split; lower 1st premolars; refer
Bullseye suggests that:
the root takes a 90 degree curve - very difficult to treat theses cases! REFER REFER REFER
Mesio-distal curvatures are ____ to see
Buccal-lingual curvatures are ____ to see
(on radiographic images)
Easy; harder
Benefits of endodontic radiology:
Suggests ____ & other _____
LEOs & other pathosis
Benefits of endodontic radiology:
May indicate ____ & ____
unseen canals & proximal anatomy
Benefits of endodontic radiology:
Largely locates most:
curvatures
Benefits of endodontic radiology:
Assists in _____ determination
working-length
Changes of horizontal angulation = ______
“SLOB” Rule
Modern diagnostic digital radiography is ______ when appropriate _____ are emplyed
without risk; radiation hygiene techniques
The lingual canal will move the ____ direction as the shift shot. The buccal canal will move the ____ way of the shift shot
same; opposite
(Line up fingers in front of face exercise)
There should be ____ about x-ray safety for adequate diagnostic/Tx purposes
no question
Radiographs help develop a:
mental image
Risks of endodontic radiology:
Many opportunities exist for ___ and ___
confusion & inauguration interpretation
Risks of endodontic radiology:
Results can be _____ leading to ____.
inaccurate diagnosis; incorrect treatment
A risk of endodontic radiology is that results can be inaccurate leading to incorrect treatment, because of this, its extremely important to:
avoid making diagnosis solely off of radiograph
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)
- artifacts
- poor resolution
- wrong angulation
The 3 biggest risks of endodontic radiology include:
- 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
Unless you like spending time and money in court: (its a saying)
Errors of commission = Errors of omission
______ curvatures are more easily noticed than ____
mesio-distal; bucco-lingual
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 the lingual (good opportunity to refer)
bullseye
When you see a bullseye on an image, you are seeing a ____ or _____ _____; you don’t know if it curves to the ____ or ____
facial or lingual root tip; facial or lingual
When you see a bullseye on an image, its a good idea to:
refer
This image shows an example of a:
bullseye
This 4th (ditto-lingual) root is seen most frequently in _____ & ____ populations
Native American; Asian
What kind of root is seen most frequently in Native American and Asian populations?
4th disto-lingual root
Often the disto-lingual root and canal curve sharply to the _____ to present this classic appearance
facial
A distal shift shot on #30 would make the ML root appear to move:
distal to the MB root
Which of the following is not necessary for quality diagnostic routine endodontic films?
panorex
