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BDS3 R+M - CONs > 3. Access Cavity + Root Canal Preparation > Flashcards

3. Access Cavity + Root Canal Preparation Flashcards

1
Q

Steps of preparation RCT?

A
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2
Q
  1. PREPARATION OF THE TOOTH FOR RCT

— — — — — — — — — — —

Why is a thorough clinical + radiographic assessment required?

A
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3
Q

ANATOMY REVISION

A
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4
Q
A
  • UR quadrant
  • UR5,6,7 + partially UR4
  • maxillary sinus visible

UR7
- has deep occlusal restoration
- visible pulp chamber
- visible root canal
- no clear peri apex of mesial + distobuccal roots

UR6
visible:
- restoration
- pulp chamber
- root canal space
- roots

UR5
- possible distal caries
- not clear if periapical radiolucency

UR4
- previous RCT

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5
Q
  1. PREPARATION OF THE TOOTH FOR RCT

— — — — — — — — — — —

What to look at when assessing/ considering the radiograph?

A
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6
Q
A
  • partially LR6,7,8
  • inferior alveolar canal
  • 8 is impacting on the 7 - creating plaque retention + secondary caries
  • caries is close to the pulp chamber
  • fair bone level

LR7
- roots are slightly curved
- fusion of roots
- possible mesial caries
- can see restoration slightly

LR6
- large OD restoration
- secondary caries dismally
Affected pulp how distally
- more straight canal
- clear visible canals

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7
Q
A
  • LL quadrant

Distal tooth
- distal tooth has large caries close to pulp chamber
- curved root mesial
- straight root distally

Mesial tooth
- occlusal restoration
- possible mesial caries
- pulp chamber visible

  • Periapical area looks intact on both teeth
  • easier access on straighter canals
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8
Q
  1. PREPARATION OF THE TOOTH FOR RCT

— — — — — — — — — — —

Following clinical + radiographic assessment, what do we need to do prior to RCT?

A
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9
Q
  1. PREPARATION OF THE TOOTH FOR RCT
    — — — — — — — — — — —

Should the tooth be restorable, what should be done?

A
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10
Q
  1. ACCESS CAVITY PREPARATION + CANAL ORIFICE IDENTIFICATION
    — — — — — — — — — — —

What is an access cavity?

A
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11
Q
  1. ACCESS CAVITY PREPARATION + CANAL ORIFICE IDENTIFICATION
    — — — — — — — — — — —

Objectives of access cavity preparation?

A
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12
Q
  1. ACCESS CAVITY PREPARATION + CANAL ORIFICE IDENTIFICATION
    — — — — — — — — — — —
A
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13
Q
  1. ACCESS CAVITY PREPARATION + CANAL ORIFICE IDENTIFICATION
    — — — — — — — — — — —

Equipment needed for preparation?

A

FOR ISOLATION
- Rubber dam punch
- rubber dam
- forceps
- frame
- clamp

  • tungsten carbide burr or diamond burr
  • endoZ burr
  • rose head burr
  • excavator
  • sodium hypochlorite
  • DG16 probe
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14
Q
  1. ACCESS CAVITY PREPARATION + CANAL ORIFICE IDENTIFICATION
    — — — — — — — — — — —

Steps?

A
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15
Q
  1. ACCESS CAVITY PREPARATION + CANAL ORIFICE IDENTIFICATION
    — — — — — — — — — —

What may complicate the prep + canal orifice identification?
MAKE BETTER Q??

A
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16
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Maxillary central incisor

  • where do we start access cavity?
  • access cavity shape?
  • how many root canals?
  • average root length?
A
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17
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Maxillary lateral incisor

  • where do we start access cavity?
  • access cavity shape?
  • how many root canals?
  • average root length?
A
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18
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Maxillary canine

  • access cavity shape?
  • how many root canals?
  • average root length?
A
  • V long root - prob longest one we have
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19
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Maxillary 1st premolar

  • where do we start access cavity?
  • access cavity shape?
  • how many root canals?
  • where are the root canals usu located?
A
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20
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Maxillary 2nd premolar

  • access cavity shape?
  • how many root canals?
  • average root length?
A
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21
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Maxillary 1st molar

  • access cavity shape?
  • how many root canals?
  • average root length?
  • where are the root canals usu positioned?
A
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22
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Maxillary 2nd molar

  • access cavity shape?
  • how many root canals?
  • where are the roots usu positioned?
A
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23
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Mandibular central incisor

  • where do we start access cavity?
  • access cavity shape?
  • how many root canals?
  • average root length?
24
Q

ACCESS CAVITY SHAPES
— — — — — — — — — —

Mandibular canine

  • where do we start access cavity?
  • access cavity shape?
  • how many root canals?
  • average root length?
  • roots usu positioned?
25
ACCESS CAVITY SHAPES — — — — — — — — — — Mandibular 1st premolar - where do we start access cavity? - access cavity shape? - how many root canals? - average root length? - roots usu positioned?
26
ACCESS CAVITY SHAPES — — — — — — — — — — Mandibular 2nd premolar - access cavity shape? - how many root canals? - average root length? - roots usu positioned?
27
ACCESS CAVITY SHAPES — — — — — — — — — — Mandibular 1st molar - access cavity shape? - how many root canals? - average root length? - roots usu positioned?
28
ACCESS CAVITY SHAPES — — — — — — — — — — Mandibular 2nd molar - access cavity shape? - how many root canals? - average root length? - roots usu positioned?
29
ACCESS CAVITY SHAPES — — — — — — — — — —
30
3. CREATING STRAIGHT-LINE ACCESS — — — — — — — — — — — What do you do once the canal orifices have been located?
Remove the coronal interferences ↳ any necessary modifications to the access cavity are made to ensure unimpeded (straight line access) to the coronal two- thirds of the canals
31
3. CREATING STRAIGHT-LINE ACCESS — — — — — — — — — — — What equipment do you use?
32
3. CREATING STRAIGHT-LINE ACCESS — — — — — — — — — — Are these preps sufficient, if not what is wrong with them?
- left images = sufficient preps - right = problems with preps
33
34
After creating a straight line access we are now ready to enter the root canal
35
What is chemo-mechanical debridement?
- chemically + mechanically preparing the tooth by
36
What are the aims of mechanical + chemical preparation?
37
4. INITIAL NEGOTIATION — — — — — — — — — — What do you do?
38
5. CORONAL FLARING — — — — — — — — — — What is done during coronal flaring?
39
5. CORONAL FLARING — — — — — — — — — — Aims of coronal flaring?
40
5. CORONAL FLARING — — — — — — — — — — What equipment is used for coronal flaring?
Gates golden burr with slow handpiece
41
Tips for when using gates glider burrs
42
43
How to avoid creating complications while using files?
44
What irrigating solutions are there? Why may EDTA be used as an irrigating solution?
45
Why is coronal flaring important?
46
6. WORKING LENGTH DETERMINATION — — — — — — — — — — What is the working length?
47
6. WORKING LENGTH DETERMINATION — — — — — — — — — — How can it be calculated?
- pre-operative radiograph ↳ determined roughly, measured with a ruler - electronic apex locator ↳ precisely determined
48
6. WORKING LENGTH DETERMINATION — — — — — — — — — — How does an electronic apex locator work?
49
6. WORKING LENGTH DETERMINATION — — — — — — — — — — Why may an apex locator not work?
50
6. WORKING LENGTH DETERMINATION — — — — — — — — — — How may you make an apical constriction in necrotic teeth?
51
6. WORKING LENGTH DETERMINATION — — — — — — — — — — TIP
52
7. APICAL PREPARATION — — — — — — — — — — What are the main aims?
53
7. APICAL PREPARATION — — — — — — — — — — How do we prepare the apical third of the canal + create an apical taper?
54
7. APICAL PREPARATION — — — — — — — — — — What equipment do we use?
55
7. APICAL PREPARATION — — — — — — — — — — TIPS
56
Hand instrument VS rotary instruments
57
Hand instrument VS rotary instruments

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