HOW TO DO ENDO

Question 1

steps to endo?

Answer 1

1. diagnose tooth
2. pre-op radiograph
3. locate and access canals
4. working length and mechanochemical preparation
5. temporise
6. obturate
7. radiograph to ensure length is met
8. restore
9. post-op radiograph

Question 2

what are gates glidden drills used for?

Answer 2

for accessing the root canal

Question 3

once you’ve accessed the canal, what are the steps?

Answer 3

1. K File 10/15 until resistance - watchwind
2. coronal flare with SX - brush motion
3. establish working length with K file
4. coronal shaping - S1 and S2
5. work up to F1, F2 and F3 (finishing files) until WL is reaches

Question 4

what must you do between filing?

Answer 4

irrigating with sodium hypochlorite

Question 5

how do you temporise?

Answer 5

1. dress with non-setting calcium hydroxide
2. place cotton wool pledget to prevent restorative material getting stuck in canal
3. use chemfil rock as temp

Question 6

why is non-setting calcium hydroxide good for temp?

Answer 6

high pH
antibacterial
stimulate healing
radio-opaque

Question 7

what instruments are used in obturation?

Answer 7

paper points
GP
accessory GP
finger spreads
tubiseal

Question 8

how is the master GP picked?

Answer 8

depends on the finishing file

F1 - primary
F2 - secondary
F3 - tertiary

Question 9

how should the master GP feel?

Answer 9

slight tug back from the canal

Question 10

how do you obturate and restore?

Answer 10

• dry canal with paper points
• place in master GP w/ cement
• place finger spreaders
• place accessory points until compact
• use heater plugger to remove excess GP
• line cavity with RMGIC
• restore

Question 11

what are the protaper files? what are the colours and which areas do they file?

Answer 11

the shaping files

SX - gold
- widen coronal third

S1 - purple
- widen coronal and mid third

S2 - white
- widen mid third

Question 12

what are the finishing file colours?

Answer 12

F1 - yellow
F2 - red
F3 - blue