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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?
A
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?
A
25
Q

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?
A
26
Q

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

Mandibular 2nd premolar

  • access cavity shape?
  • how many root canals?
  • average root length?
  • roots usu positioned?
A
27
Q

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

Mandibular 1st molar

  • access cavity shape?
  • how many root canals?
  • average root length?
  • roots usu positioned?
A
28
Q

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

Mandibular 2nd molar

  • access cavity shape?
  • how many root canals?
  • average root length?
  • roots usu positioned?
A
29
Q

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

A
30
Q
  1. CREATING STRAIGHT-LINE ACCESS
    — — — — — — — — — — —

What do you do once the canal orifices have been located?

A

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
Q
  1. CREATING STRAIGHT-LINE ACCESS
    — — — — — — — — — — —

What equipment do you use?

A
32
Q
  1. CREATING STRAIGHT-LINE ACCESS
    — — — — — — — — — —

Are these preps sufficient, if not what is wrong with them?

A
  • left images = sufficient preps
  • right = problems with preps
33
Q
A
34
Q

After creating a straight line access we are now ready to enter the root canal

A
35
Q

What is chemo-mechanical debridement?

A
  • chemically + mechanically preparing the tooth by
36
Q

What are the aims of mechanical + chemical preparation?

A
37
Q
  1. INITIAL NEGOTIATION
    — — — — — — — — — —

What do you do?

A
38
Q
  1. CORONAL FLARING
    — — — — — — — — — —

What is done during coronal flaring?

A
39
Q
  1. CORONAL FLARING
    — — — — — — — — — —

Aims of coronal flaring?

A
40
Q
  1. CORONAL FLARING
    — — — — — — — — — —

What equipment is used for coronal flaring?

A

Gates golden burr with slow handpiece

41
Q

Tips for when using gates glider burrs

A
42
Q
A
43
Q

How to avoid creating complications while using files?

A
44
Q

What irrigating solutions are there?

Why may EDTA be used as an irrigating solution?

A
45
Q

Why is coronal flaring important?

A
46
Q
  1. WORKING LENGTH DETERMINATION
    — — — — — — — — — —

What is the working length?

A
47
Q
  1. WORKING LENGTH DETERMINATION
    — — — — — — — — — —

How can it be calculated?

A
  • pre-operative radiograph
    ↳ determined roughly, measured with a ruler
  • electronic apex locator
    ↳ precisely determined
48
Q
  1. WORKING LENGTH DETERMINATION
    — — — — — — — — — —

How does an electronic apex locator work?

A
49
Q
  1. WORKING LENGTH DETERMINATION
    — — — — — — — — — —

Why may an apex locator not work?

A
50
Q
  1. WORKING LENGTH DETERMINATION
    — — — — — — — — — —

How may you make an apical constriction in necrotic teeth?

A
51
Q
  1. WORKING LENGTH DETERMINATION
    — — — — — — — — — —

TIP

A
52
Q
  1. APICAL PREPARATION
    — — — — — — — — — —

What are the main aims?

A
53
Q
  1. APICAL PREPARATION
    — — — — — — — — — —

How do we prepare the apical third of the canal + create an apical taper?

A
54
Q
  1. APICAL PREPARATION
    — — — — — — — — — —

What equipment do we use?

A
55
Q
  1. APICAL PREPARATION
    — — — — — — — — — —

TIPS

A
56
Q

Hand instrument VS rotary instruments

A
57
Q

Hand instrument VS rotary instruments

A

BDS3 R+M - CONs (3 decks)

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