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Flashcards in Quiz 1 Deck (22)
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1

5 Objectives of access openings

1. Remove Caries

2. Conserve sound tooth structure

3. DEBRIDEMENT -- penetrate pulp roof and remove pulp tissue

4. Locate all canal orifices

5. Establish a straight line access

2

4 endo access principles

1. Outline Form

2. Convenience form

3. Caries removal

4. Toilet of canal

3

Anterior access outlie

Ovoid

4

Bicuspid access outline

5

Maxillary molar

6

Mandibular molar

Rhomboid

7

Access Burs

330

Round #2, #4, #6

Diamond burs

Slow Speed round burs

 

8

Maxillary Incisor

Access: Rounded triangle (young) ovoid (with age)

Canals: 100% single canal

Root: Tips distally

 

9

Mandibular Incisor

Access: Triangular to ovoid

Canals: Two canals (50%) o

 

10

Canines

Access: Ovoid

Canals: Maxillary (1 canal)

Mandibular (2 canals - 3-6% of the time)

Roots: Maxillary --> tips distally, apex tilts facially 

mandibular --> tips distally

11

1st Maxillary Premolars

Access: Ovoid

Canals: Two canals (60-80%), Three canals (6%)

Root: curve distally 

12

2nd Maxillary Premolar

Access: Ovoid

Canals: One canal (80-90%), two canals

Root: curve distally, 1 root (80%)

13

1st Mandibular Premolar

Access: Ovoid

Canals: One canal (75%) Two canals (25%) Three canals (1%)

Roots: Tips distally and lingually

14

2nd Mandibular Premolar

Access: Ovoid

Canals: One canal (85%) Two canals (15%)

Roots: curves distally 

15

Maxillary 1st Molar

Access: Triangular

Canals: (Three roots, 4 canals)

* Palatal - one canal (100%)

*Distobuccal -- one canal (100%)

* Mesiobuccal -- two canals (20 - 80%)

 

16

Maxillary 2nd molar

Acces: Triangular

Canals:

Roots:

 

17

Mandibular 1st molar

Access: Rhomboid

Canals: 3-4 canals (Mesial Root: 2 canals, Distal Root: 2 canals)

Roots: 2 roots

Distal root curves mesially

Mesial root curves distally

18

Radix Entomolaris

3rd root in mandibular 1st molars

Seen more in asian populations

x-rays look normal but faint

19

Mandibular 2nd molar

Access: Rhomboid

Canals: 3-4 canals (2 canals in mesial root, 1 or 2(6%) canals in distal root)

Roots: 2 roots

20

Contain 2 or more roots... 

1. Mandibular teeth

2. Mesiobuccal root of maxillary incisors

3. Maxillary 1st premolar

21

One canal almost always.... (3)

1. Maxillary Anterior

2. Maxillary 2nd premolars

3. Palatal and distobuccal roots of maxillary incisors

22

Canal Paths

1. Merge: mandibular incisors

2. Divide -- dilacerate

3. Curve

4. Recurve (S shaped)