Brainscape's Knowledge GenomeTM

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


See full index

5th - APD > Access/ Instrumentation > Flashcards

Access/ Instrumentation Flashcards

1
Q

What is the MBD rule?

A

When the X-ray tube moves medially the buccal canal moves distal

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

What should be included in clinical exam prior to tx?

A 
Any caries/ suboptimal resotrations
Structural durability - cracks
Rotating/ tilting
Mobility
Periodontal pocket
TTP
Vitality
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What other rule can be used to determine canal position during x-ray?

A

SLOB

Same lingual, opposite buccal

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

How does SLOB rule relate to endo?

A

Xray tube moves mesial so lingual (or palatal) canal moves in same direction (mesial) and buccal canal moves opposite (distal)

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

Do furcal lesions change prognosis?

A

If large PA lesion between roots have guarded prognosis

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

What preliminary tx should be provided?

A

Tooth adequately restored

Dismantle any coronal restorations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What instrument should always be used to remove crown?

A

Flat plastic

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

Where should bur lines be placed when removing crown?

A

Buccal
Then occlusal
Then palatal

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

What features should aim for in access preparation?

A

No undercut
All orifices visible
Smooth axial wall
Straight line access for instrument

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

When should curves of canals be straightened if possible?

A

Allow more accurate WL determination

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

How many canals does lower incisor have?

A

2 canals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What can mistakes in orientation or depth gauge result in?

A

Perforation including between furcation

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

How avoid perforation at furcation?

A

Measure distance from occlusal aspect to furcation

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

How many canals does upper premolar have?

A

2 canals

Second premolar may only have one

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

What is a feature to be aware of with upper premolars

A

Have deep pulp chambers - can be half working length

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

What is a risk of upper premolars?

A

Access cavity not deep enough to remove all root of chamber - instrument chamber > canals

17
Q

How many canals do lower premolars have?

A

Often 1

18
Q

What % of lower premolars have two canals?

A

30%

19
Q

Which canal is missed if a lower premolar has tow canals

A

Often lingual canal - often due to access

Ensure no dentine shelf

20
Q

How to test for additional lingual canal in lower premolar?

A

Drag file down lingual aspect of canal - may feel catch

21
Q

How many canals do upper molars have?

A

6s - 4 canals

7s - 3 canals

22
Q

What canals are present in upper moalrs

A

MB1 (MB2 poss)
DB
P

23
Q

What is shape of access for premolar?

A

Ovoid - centre of tooth w/ bucco-lingual expansion

24
Q

How access upper molar?

A

Access shifted mesial - distorted triangle

25
Q

What canal is largest in upper molar?

A

Palatal canal

26
Q

How to find MB2 if have palatal and MB1?

A

Draw line MB1 to palatal - MB2 usually 1-2mm mesial and 2-3mm palatal from MB1

27
Q

What differs to access in upper second molar compared first?

A

MB2 less common

Canal entrance may be closer together

28
Q

How many canals does lower first molar have?

A

3

2 mesial: ML, MB and one big distal

29
Q

What are basic equipment needed to help with visualisation and access?

A

DG16 probe
Long-shanked burs
Goose neck bur

30
Q

Why are goose neck bur helpful but what is the disadvantage of this?

A

Thin shank helps with visualisation

Prone to breakage

31
Q

What are basic steps of access?

A

Access with appropriate bur - use LN to improve visibility
De-roof pulp chamber - endo-Z
Smooth sides access w/ endo-z
Prepare coronal canal prep

32
Q

What should multi-rooted tooth have?

A

Own reference point on occlusal surface and WL

33
Q

How to reduce chance of strip perforation?

A

Preferential filing away from high risk area

34
Q

What is a strip perforation?

A

Long/narrow perforation down the canal - hard to repair

35
Q

What is a Hedstrom file?

A

Flute shaped file

36
Q

When is a Hedstrom file advantageous?

A

When have sclerosed canal

37
Q

What to bear in mind with curved canals?

A

As become straighter working length shortens

5th - APD (8 decks)

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