Endo Radiology Flashcards
Is an x ray a 2d or 3d image?
2d
How many PA radiogragphs should be taken on posterior teeth for endo?
2
1 normal PA
1 20 degree angled
If deep caries are suspected on a posterior tooth needing endo, what radiograph should you take to confirm extent of caries
Bitewing
What 2 things should radiographs be for endo?
Current
Diagnostic
How long is considered current for a radiograph if there is no change?
1-2 months
Benefits of \_\_\_\_\_\_\_ •Suggests LEOs & other Patholosis •May Indicate Unseen Canals & Proximal Anatomy •Largely locates most curvatures •Assists in Working-Length Determination
Endo radiographs
Is there much risk in radiographic endo?
Not much
What are the 3 biggest risks of endodontic radiology?
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
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
Bullseye
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
3rd root
We want to work and fill at ____. short of the canal exit in most cases.
1.0 mm
How should you be able to tell which canal is which in a radiograph?
Take 2 radiographs one straight on and one shift shot
If the x ray tube is shifted mesially, the buccal root will move which way?
Distally
If the x ray tube is shifted mesially, the lingual root will move which way?
Mesially
What is the most commonly retreated endo tooth?
Max 1st molar
T/F: A radiolucency of endodontic origin is often BUT not always associated with a pulpal DX of necrotic pulp.
True
What is a tell tale sign for VRF?
J shaped bone loss
If there is a HRF, is there mobility?
yes
A distinguishing characteristic of a radiographic LEO is the at the radiolucency _____ at the apex regardless of cone angulation
Stay
Are all PA radiolucencies are of endodontic orgin?
No
The _____ is often superimposed on maxillary posterior apices. Do not be fooled!
maxillary sinus
Is pathology usually bilateral and symmetircal?
No
The ______ are often superimposed on the central and lateral apices (especially when a high bisecting angle technique is used)
nasal cavities
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.
AWAY FROM
Possibly the most common Anatomical Landmark to be confused w LEO*
Mental foramen
If radiolucent area moves ____ the apex on multiple angled films, it is associated with the apex and therefore is probably a P/A lesion.
WITH
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
Lateral Periodontal cyst
A dysplastic, rather than pathologic or inflammatory condition.
Characteristics:
*All teeth were vital and asymptomatic
Radiolucent vs radiopaque (mixed)
Periapical Cemental Osseous Dysplasia (PCOD)
______ 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.
Central Giant Cell Granuloma
_______
•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
Metastatic Breast CA
