Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Endodontics 2 > Use of the EPT & the Apex > Flashcards

Use of the EPT & the Apex Flashcards

1
Q

– Sensibility
(2)

A
  • Does the tooth respond to a stimulus
  • Example: Hot, Cold, EPT
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

– Vitality
(2)

A
  • Does the tooth have pulpal blood flow
  • Example: Laser Doppler Flow, Pulse Oximetery
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

– Specificity

A
  • Ability of a test to identify people WITHOUT disease
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

– Sensitivity

A
  • Ability of a test to identify people WITH disease
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Do we use EPT as part of routine
clinical testing?

A

no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Do we use EPT as part of routine
clinical testing?
NO!
(2)

A
  • EPT is NOT a
    primary or routine
    clinical testing
    instrument.
  • Thermal testing is
    inconclusive, use the
    EPT.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

EPT is an ADJUNCT to
thermal sensitivity testing.
(2)

A

– If we do not get a definitive
or reproducible result with
thermal testing, incorporate
EPT.
– If thermal testing provides
a result in accordance with
clinical signs and
symptoms, do not
incorporate EPT.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

– (2) used in conjunction resulted in a
more accurate method for diagnostic testing.

A

Cold test and EPT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

– If tests positive to EPT and cold, –% chance it is
vital.

A

97

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

– If tests negative (=80) to EPT and cold, –% chance
it is necrotic.

A

90

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Electric Pulp Tester

A
  • Deliver current
    sufficient to stimulate
    A-delta fibers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

EPT
– If sharp sensation felt,

– If no sensation felt,

A

some functioning
nerve fibers are
present in the pulp

fibers not functioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

EPT reveals
response of fibers
as current increases
on a scale from

A

0-
80.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Is a tooth with a reading of 20 more or less
vital than a tooth with a reading of 40 or 60?

A

Neither!!!
* Do not attempt to differentiate “vitality” based on
the magnitude of the numbers (20 vs. 40 vs. 60)
* EPT does not give an accurate indication of the
histological health or disease state of the pulp.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Simple Rule:
Reading < 80:
Reading = 80:

A

Tooth likely “vital” (intact nerve fibers
present)
Tooth likely necrotic (intact nerve fibers
not present)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

EPT
How to Use
(7)

A

Dry the tooth
Isolate tooth with cotton roll
Place conductor on tooth
Patient and Dentist hold wand
Patient releases when sensation felt
Record number
Start with healthy teeth
(Test 2-3 to establish baseline)

17
Q

CONDUCTOR?
(3)

A
  • Toothpaste
  • Electrode Gel
  • Water
18
Q

WHERE?
* Anteriors:
* Premolars:
* Molars:

A

Facial surface or incisal edge
Buccal cusp tip
Mesiobuccal cusp tip

19
Q

False Positives
(7)

A

– Poor isolation
– Conductor in contact with adjacent teeth
– Touched gingiva
– Patient comprehension
– Patient anxiety
– Conduction via interproximal restorations
– Putrescence of pulp tissue communicating with
adjacent teeth

20
Q

False Negatives
(7)

A

– Failed to achieve adequate contact with tooth
– Patient finger does not achieve adequate contact
– High pain threshold
– Battery low
– Machine not working
– Sedative medication
– Orthodontic activation

21
Q

Unreliable with …
* Trauma
(2)

A

– Loss of normal response for period of time
– 1-3 months

22
Q

Unreliable with …
* Immature Pulp
(3)

A

– May yield no response (80)
– Fewer A-delta fibers
– Nerves have not reached maximal depth of
penetration

23
Q

Length Determination
Methods?
(3)

A
  • Electronic apex locator
  • Radiographic determination
  • Paper point
  • Feel
24
Q

Electronic apex locator
Basic Principles
* Human tissues have characteristics that
can be modelled by a combination of…
* (2) are insulators
* At apex, conductive — are present
* Apical constriction approximately —
short of root tip

A

electrical components
Dentin and cementum
fluids
1 mm

25
Q

In the Canal
* Apex locator
will display bars
as you
approach the —
* Intermittent
“—”
* No — lines

A

apex
Beep
red

26
Q

What we want to see
(3)

A
  • Apex locator
    will display a
    red bar
  • Constant
    “Beeeeeeeeep”
  • Red line =
    patency
27
Q

What does the apex locator tell us?

(3)

A

We are in the canal (blue)
We are at the PDL (red)
We use this measurement to determine our working length. Subtract 1 mm
from RED length to establish working length

28
Q

What do the numbers 3, 2, and 1
on the apex locator mean?

A

Nothing
The numbers indicate you are within
the canal, not the distance from the
apex

29
Q

ELA
How to Use

A

Educate patient on procedure
and expectationsAssemble, turn on, and check
battery meter (70% or >)
Assemble, turn on, and check
battery meter (70% or >)Connect lip clip and file holder
(Fig 1.)
*If continuous beep present, apex locator
is working
Connect lip clip and file holder
(Fig 1.)
*If continuous beep present, apex locator
is workingPlace lip clip on corner of mouth
(Fig 2.)
*Do not remove rubber dam
Place lip clip on corner of mouth
(Fig 2.)
*Do not remove rubber dam
Insert Size 10 file into canalClip file holder to file
(Fig 3)
Clip file holder to file
(Fig 3)Slowly negotiate canal to
get controlled swing of bars
* Proceed until 1st solid tone
Slowly negotiate canal to
get controlled swing of bars
* Proceed until 1st solid toneMove rubber stopper to
reference point or note
reference mark on file
Move rubber stopper to
reference point or note
reference mark on fil
Remove clip and fileMeasure file length
from rubber stopper
Measure file length
from rubber stopperSubtract 1 mm to
establish WL
Subtract 1 mm to
establish WLRepeat for all canals
Repeat for all canals

30
Q

WL Radiograph
* Use a #15 file
(3)

A

– Able to identify tip
on radiograph
– Ensure placed 1
mm short of
patency length
– Do not spend more
than 5 minutes
(call for faculty if
not working)

31
Q

Detecting Perforations
“Procedural Misadventure”
* Perforations happen
* Early detection and repair,
better long-term prognosis
* Apex locator identifies when
we have reached —
* Perforation is direct
communication with —
* Apex locator immediately
goes to — upon entrance
to perforation

A

PDL
PDL
RED

32
Q

Root Canals Not Suitable for EAL
(5)

A

Exceptionally large apical
foramen
Fluid overflowing orifice
Broken crown w/ gingival
intrusion
Small access with metallic
restoration
Caries touching gingiva

Endodontics 2 (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions