Day 3

Question 1

**CAVIT DRAWS WATER FROM

Answer 1

DENTINAL TUBULES – CAN CAUSE PAIN IF YOU HAVEN’T REMOVED PULP**

Question 2

Common for temp filling to

Answer 2

wear down inside access opening, as it is softer.

Question 3

Adhesive cement for us –

Answer 3

grossman’s sealer

Question 4

The main objective of obturation is to create a seal from the

Answer 4

coronal to the apical.

Question 5

—– is more important than obturation!

Answer 5

Cleaning and shaping

Question 6

When Not to ObturatE?

Answer 6

Continued purulence or exudate in the canals – inability to dry the canal system

Significant swelling

Unable to complete treatment same day (complicated case, pain problems, time constraints)

Question 7

If pus in the canal/draining into canal from apex, you need to have a

Answer 7

clean and dry system before obturation.

Question 8

Significant swelling can lead to

Answer 8

drainage through tooth and can lead to problems.

Question 9

Carrier based systems are a combination of

Answer 9

solid materials. Often some kind of core material (plastic, metal) with gutta percha wrapped around it. These are unnecessary, but popular because they are marketed and sold in such a way to indicate that they make root canals easier (?).

Question 10

Pastes

Answer 10

Difficult to control length (easy to overfill)
Poor seal (inconsistent seal)
May shrink
May contain toxic materials

Do not use paraformaldehyde containing materials

Question 11

Silver Points

Answer 11

No longer recommended for use because of problems with corrosion by-products

Do NOT need to be retreated unless pathosis or if needed for restoration (if tooth needs post space)

Question 12

Carrier based systems require

Answer 12

oven heating

Question 13

Carrier based systems - problem

Answer 13

Problems:
ability to be forced to length without adequate cleaning and shaping
difficult to retreat

Question 14

Gutta Percha by composition:

Answer 14

Mostly Zinc-Oxide (approx 75%) Gutta Percha (20%)

Question 15

master cones.

Answer 15

Have same sizes as the files. Usually a color on them to correspond to this

Question 16

—– actually adheres to canal walls. —– will never adhere to the canal itself.

Answer 16

Sealer

Gutta percha

Question 17

Sealers

4 major types:

Answer 17

ZOE (zinc oxide eugenol)*
Plastics
Glass Ionomer
Calcium Hydroxide Containing

Other three are used somewhat (Plastics, GI), not as much. CaOH is not really used anymore.

Question 18

Cold lateral condensation -

Answer 18

gold standard, safest and easiest technique

Question 19

Dry canal with

Answer 19

paper points – coarse points used initially followed by medium points.

Measure these to and crimp at the working length. You don’t want these to draw out nonsense in the apex.

Question 20

Chloroform solvent –

Answer 20

can be used to mold GP points, older technique that isn’t done at OSU. Not necessary with the kind of teeth we are treating.

Question 21

Characteristics of endodontic lesions

Answer 21

The lamina dura is no longer intact (trace the PDL on the films)

A classic lesion looks like a “hanging drop”

The radiolucency stays at the apex with angled films

Is there a reason for it? (does the tooth have etiological factors?)

Question 22

If you treat it yourself, you are more likely to

Answer 22

look at post-op radiograph and say “looks better/like it’s healing” and more likely to be critical of other people’s cases.

Question 23

PULPAL Diagnosis can not be determined by a

Answer 23

radiograph alone!!! (i.e. in the absence of a periapical radiolucency, you can not tell irreversible pulpitis from pulpal necrosis on a radiograph)

Question 24

For start and finish films, use the

Answer 24

Rinn positioner.

Question 25

For working films (during treatment under the rubber dam), use

Answer 25

hemostats

Question 26

Another trick is to use

Answer 26

2 different sized files – use a 15 and a 10 to get working length. It can be difficult to distinguish between two sizes, but it can help.

Question 27

Most often max 1st premolars have type —- Sometimes more. When you have fatter root, more likely to have more —-.

Answer 27

2.

canals