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Endodontics II > Midterm Study Guide > Flashcards

Midterm Study Guide Flashcards

1
Q

Dentists are held to the ____ safe standard as endodontists

A

Same

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2
Q

Working length is:

A

1.0 mm short of canal exit

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3
Q

Device used in clinic (not lab) to determine working length:

A

Apex locator

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4
Q

Gentle right and left rocking motion, which causes the instrument to cut while a light inward pressure, keeps the file engaged and progressing toward the apex.

A

Watch-winding motion

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5
Q

Technique used during scouting of the canal with a hand file:

A

Watch-winding

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6
Q

Increased responsiveness and reduced thresholds of nociceptors to stimulation of their receptive field:

A

Peripheral sensitization

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7
Q

T/F: Myofascial pain emanates from small foci of hyper excitable muscle tissue (trigger points)

A

True

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8
Q

You can see the canal from access with:

A

endo explorer

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9
Q

Best prognosis:

A

Pure endo lesion

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10
Q

Worst prognosis:

A

True combined lesion

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11
Q

Patient presents to clinic with a lesion described as:

  • wide base
  • cone shaped
  • calculus present

What origin is this lesion?

A

Periodontal origin

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12
Q

Vertical root fracture is described by:

A
  1. J-shaped lesion
  2. Drop off pocket
  3. something else

(all of the above)

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13
Q

Vortex blue size for straight-line access and high cervical break:

A

.25/.12

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14
Q

A 4th root (DL Canal) found in molars especially in Native American and some Asian populations

This 4th root exits the coronal portion of the tooth in a lingual direction and often curves abruptly back to the facial

A

Bulls eye

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15
Q

Tooth #29 has a total length of 24 mm and a crown length is 9mm, to file the middle 1/3 of root with wave one file, one would set the stop at:

A

19mm

Take total length - crown length then divide that by 3

24-9 = 15

15/3= 5

First 1/3: (9+5= 14)
Middle 1/3: (14+5 =19)
Apical 1/3: (19+5=24)

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16
Q

What file do we use for scouting?

A

10

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17
Q

T/F: Master cone should be placed in a wet canal

A

False

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18
Q

T/F: It is NOT necessary to take master cone x-ray if you did proper fitting

A

True

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19
Q

T/F: Incident report should be filed within 24hrs

A

False- must be filled out within 48 hours

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20
Q

Select all that apply for a recall appointment:

A
  1. tooth pain
  2. DST
  3. something else
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21
Q

Best radiographic option to see resorptive defects:

A

CBCT

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22
Q

Possibly the worst iatrogenic injury; caused when a large instrument is misdirected or used aggressively

A

Strip performaton

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23
Q

“too thick in canal”

A

A- Zip
B- Crown perforation
C- Strip perforation

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24
Q

All posterior teeth need a full restoration after RCT because:

A

A- esthetic concern for patient
B- prevent root fracture
C- proper healing and function
D- all of the above

(All of the above)

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25
Q

A straight file would cause a ledge on what wall of the curve?

A

Outer wall of canal

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26
Q

Iatrogenic error means:

A

caused by clinician

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27
Q

The mesial root of the mandibular molar occurs:

A

distal

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28
Q

Select the 2 teeth most likely to have 2 roots:

A- Max 1st PM
B- Max 2nd PM
C- Mand 1st PM
D- Mand 2nd PM

A

A & B

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29
Q

What is the shape of access for maxillary central incisor?

A

Triangle with base at incisal

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30
Q

Master cone should only bind at:

A

working length

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31
Q

Why do we use a #15 file to radiograph?

A

because a #10 is too thin and you can see #15 better

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32
Q

All are incorrect except:

A

Hand files do not need to be lubricated

(Canal needs to be irrigated following any active instrument)

33
Q

What is a common mistake for boards?

A

Access

34
Q

All requires an incident report except:

A

too much NaOCl

35
Q

Where do we bend irrigation syringe?

A

2 mm from tip

36
Q

what canal is commonly missed in the maxillary first molar?

A

MB2 canal

37
Q

Pt presents with this dilacerated tooth, what treatment should be done?

A

re-treat with endo (refer this tho for someone else)

38
Q

Patient presents with a maxillary first molar that has been previously treated with endo, however after a few years the P/A lesion has not healed. What is your diagnosis?

A

Missed MB2 canal; non-surgical pretreatment

39
Q

A student doctor perforated the coronal part of the root. The pt only had pulpal symptoms before, but after that RCT, they had periapical symptoms. What do you do now?

A
  1. carefully disinfect area (NaOCl)
  2. protect found canals with easily removable material
  3. complete easily removable temp seal over perf using “cavit” or IRM
  4. Seal the tooth with a secure temp filling over cotton pellet
  5. refer to endo
40
Q

Pt presents with fever and slight swelling. What is your PA diagnosis?

A

AAA- Acute apical abscess

41
Q

There was a molar that had an RCT a few weeks ago. PA symptoms now, and there was a possibility of perforation. What do you do?

A

Refer due to possible perforation

42
Q

Persone presents with a bump on their gums that appears to be a “pimple”. What is your diagnosis and what should you do?

A

DST; Trace with gutta percha points on radiograph to determine tooth affected. RCT?

43
Q

What do you need for hydraulic technique?

A

BC sealer and 0.04 GP cone (singular cone)

44
Q

What do you need for cold lateral compaction (CLC)technique?

A

0.02 cone, finger spreaders, accessory GP cones

45
Q

What is temp of alpha phase? What is temp of beta phase?

A

Alpha: 42-44

beta: below 42

46
Q

What is the main component of gutta percha?

A

zinc oxide

47
Q

What do you use to get rid of dentin triangle?

A

.25/.12 vortex orfice opener

48
Q

What size files do you scout canals with?

A

10

49
Q

What bend do you have to do to get past curves?

A

45 degree in last 1.5mm (maybe last 2 mm)

50
Q

When are you done with the vortex?

A

When you have white filings on the apical 1/3

51
Q

Where are you gonna transport the canal?

A

outer wall of canal

52
Q

What is it when 2 canals from orifice turn into 1 canal at apex?

A

type 2

53
Q

Describe a Type 2 canal:

A

two at orfice, one at apex

54
Q

How do you determine between a type 2 or type 3 canal?

A

Two file technique

55
Q

The two file technique can help determine between:

A

Type 2 and Type 3 canals

56
Q

The single most important factor for RCT success is…

A

case selection

57
Q

T/F: WL is 1 mm beyond apex

A

False- 1mm shy of apex

58
Q

What does the apex locator tell you?

A

Where the apex constricts/ when you’ve gone beyond the apex and out of the tooth

59
Q

T/F: If you perforate: then dry carefully, put CaOH, then put cavit, then cotton, then temp restoration.

A

True

60
Q

What’s the main thing we use bw appointments in the canals?

A

CaOH

61
Q

Which one is transported easily?

A
  1. distal of mesial root in mandibular molars
  2. MF of upper molars and upper premolars (with 2 roots)
62
Q

Which one is the least likely to get transported?

A

MANDIBULAR PM

a. MF canals of max molars
b. 2 canal PMs
c. Mesial canals of mand molars

(these are all likely to get transported)

63
Q

What is the worst mistake to make?

A

Perforation

64
Q

Iatrogenic errors can be prevented with education, care, etc:

A

true

65
Q

Ledges can lead to

A

blockage, transportation, perforation

66
Q

After correct dx, there is never an excuse to do RCT on the wrong tooth

A

true

67
Q

Which is not a consideration when deciding if you can do RCT?

A

color of the pulp

68
Q

What do you use to get rid of smear layer?

A

EDTA

69
Q

Something about how long the apical constriction is or something

A

1mm

70
Q

What’s the purpose of recall appointment?

A
  1. to determine status of tooth (healed/ diseased)
  2. for documentation purposes
  3. to see if further treatment is needed
71
Q

What step is done following determination of WL?

A

Create glide path using #15

72
Q

What do you do for a blow out?

A

shorten the working length and create more of a taper (SSB)

73
Q

What is the preferred thing to fix perforations?

A

MTA

74
Q

what file do you use for the Buccal of maxillary premolar?

A

.30/.06

75
Q

Primary consideration for RCT tx except

A

Esthetics

76
Q

why use wave one every 1/3 of root?

A

because they push debris ahead of file

77
Q

shape of maxillary central incisors access?

A

triangle with base toward incisal

78
Q

obturate canal?

A

goes to WL

79
Q
A

Endodontics II (9 decks)

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