Endo Interface

Question 1

Why may an endodontically treated tooth still give symptoms?

Answer 1

PDL

Bone

MOs - not all MO’s destroyed, can be pushed to outer surface of root

Tooth not sterile

Lateral / accessory canals (70% are in apical third)

Question 2

Avg lifespan of RCT?

Answer 2

7-10 years

Question 3

As well as Socrates, what questions can be good to ascertain endodontic diagnosis?

Answer 3

Any trauma

When was previous RCT initiated and why was it required

Did it improve symptoms at all?

Was dam and hypochlorite used

Any procedural problems?

Question 4

Special tests before commence endo?

Answer 4

E/O

I/O

• occlusion on tooth
• swelling / draining sinus
• mobility
• Perio pocketing
• percussion
• palpation
• tooth sleuth / transillumination to find fractures

Question 5

What should i look for when assessing an endodontically treated tooth?

Answer 5

Coronal seal - leakage

Remaining structure

Is it restorable and can it be isolated?

Swelling

Quality of root filling

Missed / unfilled canals

Shape of canal

Patency

Crown:root ratio

Question 6

Endo tx options?

Answer 6

Monitor / no intervene

RCT

Re RCT

Extract

Surgical intervention

Question 7

How often take PA of monitoring RCT?

Answer 7

Once a year

For 4 years

Question 8

ESE guidelines for Re-RCT tx?

Answer 8

Inadequate RCT filling with radiological findings of developing or persisting apical periodontitis / symptoms

Teeth with inadequate RCT filling when coronal restoration requires replacement or coronal tissue to be bleached

Question 9

How much weaker is a molar after an MO cavity or an MOD?

Answer 9

MOD 66%

MO 33%

Question 10

Reason for cuspal coverage?

Answer 10

Good coronal seal

Prevention of catastrophic fracture due to compromised tooth structure