Endodontic Access Part 1

Question 1

What are the 6 objectives of endodontic access?

Answer 1

1) remove caries
2) conserve tooth structure
3) unroof pulp chamber
4) remove coronal pulp tissue (vital and necrotic)
5) identify all canal orifices
6) achieve straight line access

Question 2

What are the 3 benefits of straight line access?

Answer 2

1) allows for a straight path without constriction to the coronal and mid-root
2) allows blending of the access wall to the root canal system
3) decreases metallurgical fatigue during instrumentation by reducing overall curvature

Question 3

Explain the concept of centrality in pulp chamber anatomy

Answer 3

pulp chamber is found in the centre of the tooth

Question 4

Explain what concentricity means in endo

Answer 4

internal pulp anatomy reflects the shape of the external root surface at the CEJ

Question 5

What instrument can we use for a taper in the coronal third of the root?

Answer 5

Gate Gliddens (Non-end cutting bur)

Question 6

How many sizes of Gates Gliddens are there?

Answer 6

Sizes 1-6

Question 7

How should we use the gates gliddens?

Answer 7

light brushing motion AWAY from the furcation

Question 8

Why is size 1 of the gates gliddens of limited use?

Answer 8

very fragile, easily fractured

Question 9

What 2 methods can we use for the gates gliddens?

Answer 9

Stepback (preferable - smaller sizes penetrate deeper, than use larger as you get more coronal) OR crown down

Question 10

What are 3 anatomic considerations that are good to remember when working on a maxillary molar? (difficult tooth for endos)

Answer 10

1. roots are often divergent
2. mesial concavity at CEJ
3. teeth are tipped mesially in dental arch

Question 11

How many canals in max central

Answer 11

1

Question 12

how many canals in max lateral?

Answer 12

1

Question 13

How many canals in Max canine?

Answer 13

1 (wide buccolingually)

Question 14

How many canals in max 1st premolar?

Answer 14

2 canals