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Flashcards in Access Preparation Deck (23)
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1

What are the general access prep shapes for teeth?

1-Anterior and Bicuspid: Ovoid
2-Max Molar: Triangular
3-Mand Molar: Rhomboid

2

Which law says, the pulp chamber of the tooth is always located in the center of the tooth at the level of the CEJ?

Law of Centrality

3

Which law says, the outline of the pulp chamber of a tooth is concentric to the outer boarder of the tooth at the level of the CEJ?

Law of Concentricity

4

What is the rule of symmetry?

The orifices to the pulp chamber are symmetrical with respect to a line drawn in a mesial distal direction

5

How many canals do Maxillary Incisors have?

1 canal 100% of the time

*Centrals and laterals are mostly the same

6

Mandibular incisors can be the most difficult to access and have two candles how often?

30-40%

*Classically a triangular-ovoid shaped access

7

How often do maxillary and mandibular canines have two canals respectively?

Maxillary Canine: Never (100% one canal)
Mandibular Canine: 3-6% with two canals

8

How often do 1st maxillary premolars have multiple canals?

60-80% have 2
6% have 3

9

How often do 2nd Max premolars have one canal?

80-90% one canal

10

How often do 1st mandibular premolars have multiple canals?

-75% one canal
-25% two canals
-1% three canals

11

How often to 2nd mandibular premolars have two canals?

-15% two canals

*85% one canal

12

Which tooth has the most complex root and canal anatomy?

Maxillary 1st molar

*usually 3 roots, 4 canals

13

How many canals do each of the 3 roots of a 1st maxillary molar have?

-Palatal: 100% one canal
-Distobuccal: 100% one canal
-Mesiobuccal: 20-80% two canals

14

What is characteristic of Maxillary 2nd molars?

-Similar root anatomy to max 1st molars
-More variation (1-4 canals)
-Roots often fused

15

Mandibular 1st molars have two roots and 3-4 canals, how often to the medial and distal roots have 2 canals?

Mesial: 70-80% 2 canals
Distal: 25-30% two canals

16

Mandibular 2nd molars are just smaller and more symmetrical than mand 1st molars and have two roots in the distal canal how often?

Dital root: 5-8% two canals

17

____% of all roots are curved

90

18

Which roots always have 1 canal?

-Maxillary Incisors (centrals and laterals)
-Max Canines
-Palatal and Distobuccal roots of Max 1st molars

19

Maxillary anterios have how many canals?

One

20

Mandibular incisors have how many canals?

Two canals 30-40%

21

Maxillary premolars have how many canals?

Two canals 60-80% (1st)
One canal 80-90% (2nd)

22

Mandibular premolrs have how many canals?

Two canals 15-25%

23

Maxillary molars have how many canals?

Four canals 40-80% (1st)