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Endodontics > Endo Final Study guide > Flashcards

Endo Final Study guide Flashcards

1
Q

Using a straight stainless-steel (SS) file will create a ledge in the:

A

outer wall of the canal

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2
Q

What type of file is used for scouting?

A

10 stainless steel hand file or #8 SS hand file can also be used

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3
Q

Continual clockwise rotation of SS file will result in the file:

A

becoming locked into dentin & fracturing

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4
Q

Which canal is hardest to access on the maxillary first molar?

A

MB2 canal (as often as 95%)

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5
Q

A maxillary first molar has an MB2 canal what percent of the time?

A

95%

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6
Q

Which tooth has 2 roots most of the time?

A

Maxillary first premolar (85% has two canals, 9% has one canal, 6% has three canals)

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7
Q

How should you check local anesthetic?

A

Using endo ice

(slides also mention percussion & EPT. Use whatever caused the pain prior to using LA)

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8
Q

T/F: Use whatever agent caused pain prior to LA to check the LA

A

True

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9
Q

T/F: If you miss a canal, you can still get a successful RCT

A

False

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10
Q

T/F: You must always used a rubber dam in endodontic treatment

A

True

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11
Q

How many teeth should be isolated with a rubber dam during endodontic treatment?

A

Only one

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12
Q

T/F: You should always use LA during endodontic treatment

A

True

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13
Q

What size should the canal be enlarged to for NaOCl infiltration?

A

30 sized file

(think 30/30 rule: canal should be atleast widened to a side #30 file diameter and infiltrated for atleast 30 min)

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14
Q

What does the 30/30 rule state?

A

Canal should be atleast widened to size a size #30 file diameter & infiltrated for atleadt 30 min)

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15
Q

How long should you irrigate with NaOCl for?

A

30 min

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16
Q

After you use EDTA, what should you then use to stop the EDTA from working?

A

8.3% NaOCl

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17
Q

What is the least severe type of luxation?

A

Concussion

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18
Q

List in order from least to most severe types of laxation:

A
  1. Concussion (least)
  2. Subluxation
  3. intrusion
  4. extrusion
  5. lateral luxation
  6. avulsion
  7. crown fracture
  8. crown-root fracture
  9. root fracture
  10. bone fracture (most)
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19
Q

T/F: Rigid & semi flexible splinting are used for stents to have little movement to prevent ankylosis

A

False

(Short-term flexible splints and long-term rigid splints are used to prevent ankylosis)

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20
Q

Does the following description indicate localized swelling or cellulitis?

May drain spontaneously

A

Localized swelling

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21
Q

Does the following description indicate localized swelling or cellulitis?

Patient will NOT run a fever

A

Localized swelling

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22
Q

Does the following description indicate localized swelling or cellulitis?

Patient will be seriously ill (facial pain, fever, cannot open mouth)

A

Cellulitis

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23
Q

Does the following description indicate localized swelling or cellulitis?

It is acceptable to infiltrate and drain fully

A

Localized swelling

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24
Q

Does the following description indicate localized swelling or cellulitis?

Incise and drain and antibiotics may beed to preceded pulp extirpation

A

Cellulitis

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25
Q

Does the following description indicate localized swelling or cellulitis?

Patient could experience hospitalization

A

Cellulitis

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26
Q

Does the following description indicate localized swelling or cellulitis?

Patient should be referred to an endodontist

A

Cellulitis

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27
Q

Does the following description indicate localized swelling or cellulitis?

It is acceptable to do an infra-orbital block

A

Localized swelling

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28
Q

Does the following description indicate localized swelling or cellulitis?

It is acceptable to consider incise & drain

A

Localized swelling

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29
Q

Option selection and prognosis for a horizontal root fracture (HRF) depends on:

A
  1. level of fracture
  2. restorability
  3. periodontal health
  4. vitality of pulp
  5. stage of root development

(time since injury, age of patient, cooperation of patient, availability to follow-up, approximation opportunities & stabilization options)

30
Q

Which has a worse prognosis, vertical root fracture or horizontal root fracture?

A

Vertical root fracture

31
Q

If your patient has localized pain to percussion, what anatomical feature is involved?

A

PDL

32
Q

What is the taper on a blue Vortex file?

A

0.4

(find taper by counting the marks and multiplying that number by 0.2- for example: 2 marks = 2 x 0.2= 0.4 taper)

33
Q

What is the WORST error you can make when accessing a canal?

A

Perforation

34
Q

What is the MOST COMMON error you can make when accessing maxillary first premolars?

A

Not totally unroofed

35
Q

T/F: Internal root resorption has an excellent prognosis before it perforates to PDL. External root resorptions prognosis is worse than internal respiration.

A

Both statements are true

36
Q

What is the shape of access on a maxillary central incisor?

A

Triangular with base towards incisal

37
Q

What is the shape of access on a mandibular molar?

A

Trapezoidal- need to do trapezoidal and not triangular to find the DL canal (remember that a missed canal is a failed RCT)

38
Q

Which area is the hardest to anesthetize?

A

Mandibular molar with hot irreversible pulpitis (2nd mandibular molar)

39
Q

Which tooth has the greatest challenge for access?

A

Maxillary first molars with four canals

40
Q

What can cause a challenge with local anesthetics ability to work?

A

acidic environment/low pH

41
Q

T/F: Activator does not diminish the time of use for NaOCl

A

True

42
Q

What can you reasonably assume from a J lesion?

A

Vertical root fracture

(slides say you must open the tooth surgically to confirm)

43
Q

Vital pulp therapy is used to:

A

Keep the apices vital until it closes, and the roots thicken/straighten

44
Q

Treatment aimed at preserving and maintaining pulp tissue that has been compromised by trauma, caries, or restorative procedures in a healthy state:

A

Vital pulp therapy

45
Q

Your patient comes in with pain present on their tooth. When exposed to endo ice, the pain lingers for 20 seconds. What is your pulpal diagnosis?

A

Symptomatic irreversible pulpitis

46
Q

A draining sinus tract is only found in what apical diagnosis?

A

Chronic apical abscess (CAA)

47
Q

A complicated crown fracture means:

A

there is an enamel-dentin fracture with pulpal involvement

48
Q

The most important factor for success of a preimplantation of an avulsed tooth is the:

A

Extra-oral dry time

(must be between 0-15 minutes for PDL to survive; this prevents ankylosis and external root resorption)

49
Q

T/F: You should rinse off avulsed tooth with water before reinsertion

A

False- ideally used Save-A-Tooth, then Via Span, then milk or green tea, then contact solution, then saliva, never use water

50
Q

Which tooth has the narrowest M-D width for access?

A

Mandibular incisors (central incisors)

51
Q

When can you do supplemental injections/buccal infiltration?

A

After IA block is proven to be numb

52
Q

What length should you mark your bur at for access on a molar to avoid perforation?

A

7mm

53
Q

What is the EFFECTIVE WORKING TIME for pulpal anesthetic?

A

30-90 minutes

54
Q

Most pulpal anesthetic will be lost around what time? (AVERAGE WORKING TIME)?

A

45 minutes (file says 30-45)

55
Q

T/F: Dental trauma affects the patient for life

A

True

56
Q

T/F: You should NOT complete RCT if you can not use a rubber dam and cannot find an alternative

A

True

57
Q

What is the order for hand files?

A

White, yellow, red, blue, green, black

(Will you really be going back)

58
Q

T/F: The accessory rotatory file is the only file that has 0.12 taper

A

True

59
Q

T/F: Non-perforation is better than external root resorption

A

True

60
Q

What is the working length of NaOCl irrigation in a canal?

A

2mm

61
Q

A patient comes to your office with food impaction, cervical caries present on #27 and #28, and gingival inflammation. The patient experiences pain with percussion and palpation. What should you do?

A
  1. remove all caries
  2. refer to periodontist for crown lengthening before completing restorations
62
Q

A patient comes to your office with toothbrush abrasion and hypersensitivity to cold. The patient responds normal to all other clinical tests, what is your pulpal diagnosis?

A

Reversible pulpitis

63
Q

A patient comes to your office with previously initiated RCT. What should you do?

A

Refer to an endodontist

64
Q

On a mandibular incisor, it is possible to see 2 canals. Which canals are you likely going to miss if you do not create access incisally?

A

Lingual canal

65
Q

Which bur is recommended to use for mandibular incisor access?

A

2 round bur

66
Q

What is the most important factor when working with 8.3% NaOCl?

A

Do not let the needle bind

67
Q

T/F: A end-activator significantly reduces the time necessary for NaOCl to be present in the canal when irrigating

A

False

(only saves time for the Dr because they can do other things while the machine irrigates)

68
Q

NaOCl turns into salt & water. How long does this process take to occur?

A

3-5 min

69
Q

T/F: You should always start with the tooth in question for clinical testing

A

False

(You should start with 2-3 adjacent teeth first to establish a baseline)

70
Q
A

Endodontics (17 decks)

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