Obturation & Coronal Seal

Question 1

What method is most commonly used for obturation of a root canal?

Answer 1

Cold lateral compaction

Question 2

What is the use of a master GP point?

Answer 2

To completely fit at apical collar

Question 3

What methods of obturation are there?

Answer 3

1. Cold lateral compaction
2. Warm vertical compaction
3. Continuos wave compaction
4. Carrier based obturation

Question 4

At which anatomical landmark should GP and resin sealer be removed?

Answer 4

Anteriors = ADJ
Posteriors = canal orifice

Question 5

Outline the cold lateral compaction technique

Answer 5

1. Select GP master point (corresponds with master apical file) = fits apical collar ‘tug back’ sensation felt
2. XR to confirm at correct position
3. Coat walls of canal with sealer using small file
4. Insert master GP covered in sealer
5. Condense with finger spreader 1mm short of AWL for 20s (allows space for accessory GP) –> repeat until canal is full
6. Excess GP cut off with heated instrument at base of pulp chamber. Remainder packed vertically with cold plugger to 1mm below ACJ

Question 6

What material is used for a coronal seal following RCT?

Answer 6

GIC –> definitive restoration