Review from Problem-Solving Sessions

Question 1

What is the radiographic representation of cortical bone (alveolar bone proper)?

Answer 1

Lamina dura

Question 2

How long will a radiolucency at the apex of a necrotic tooth take to heal?

Answer 2

6 months to 2 years (Average is 9 months)

Question 3

Is there a void between the coronal restoration and the gutta percha on the radiograph, should it be considered a final restoration?

Answer 3

No. The final restoration should be flush against gutta percha.

Question 4

How long should Ca(OH)2 be in the tooth prior to obturation?

Answer 4

2-4 weeks

Question 5

What are 4 types of root fracture healing patterns?

Answer 5

1. Calcified Tissue
2. Connective Tissue
3. Bone and Connective Tissue
4. Granulation Tissue

Question 6

If a radiolucency at the end of a non-vital tooth has not healed 12 months after NSRCT, what should be done?

Answer 6

Wait for 2 years from treatment, assessing at inervals radigraphically. Refer if it become symptomatic or does not heal at 2 years from treatment

Question 7

How long should walking bleach technique take?

Answer 7

3 separate visits about a week apart for 20 minutes each. There is a one-time fee regardless of the number of visits.

Question 8

Can internal bleaching regress?

Answer 8

4% do regress. You can rebleach however.

Question 9

What Dr Replogle’s product of choice for internal bleaching?

Answer 9

Sodium perborate and water.

Question 10

Can cavit be used in a vital tooth?

Answer 10

No. It absorbs water and would cause vital tooth pain

Question 11

According to Dr Replogle, how long after eruption of the tooth before the apices close?

Answer 11

3-4 years

Question 12

What is the shape of an open apex?

Answer 12

Oval or oblong

Question 13

What is the reason for using a moist cotton pellet in a pulpotomy?

Answer 13

Apply pressure and stop bleeding

Question 14

What is the reason for irrigating a pulptomty with 2.5% NaOCl?

Answer 14

Disinfect pulp stump

Question 15

What is the reason MTA is placed on pulp stumps in pulpotomy?

Answer 15

Biological permanent barrier between pulp and restorative material

Question 16

What is the reason for placing glass ionomer on top of MTA in a pulpotomy?

Answer 16

Releases fluoride to prevent further decay

Question 17

What is the reason for composite restoration in pulpotomy?

Answer 17

Provides coronal seal

Question 18

How many appointments will an MTA pulpotomy require?

Answer 18

2 because MTA must be allowed to harden for 3-4 weeks

Question 19

Why is MTA is the material of choice for a pulpotomy?

Answer 19

The tooth is free from inflammation at 1 week. It become covered with a compact hard tissue barrier of steadily increasing strength and thickness within 3 months.

Question 20

What percentage of mandibular central incisors have 2 canals?

Answer 20

25%

Question 21

If a second canal is present on a mandibular central incisors, it is usually located in which part of the root?

Answer 21

Lingual

Question 22

Why would an MTA apical barrier technique be chosen over a revascularization / regeneration procedure?

Answer 22

If necrotic tooth root already has sufficient root length and root wall thickness but apex is open, MTA is indicated. Revascularization only indicated in a necrotic tooth if it has insufficient root length and insufficient root wall thickness