week 2 endo Flashcards
how do we use a protaper
always ensure the file is rotating before introducing it into the canal
shaping files in a burst motion
what type of machine is a protaper
rotation
what do we need to do prior using rotary instruments
create a glide path first before using machines
how many brush strokes shall we use in between the protaper
3 and then IRRIGATE
how do we instrument using a protaper
Access into pulp chamber- remove all the roof
Scout coronal part of canal with 10 hand file
Create glidepath in straight with size 15
Coronal flare with SX file( the file that doesn’t have white bands on it)
Determine working length with apex locator and radiograph
Take F1 into canal with single pass, light apical pressure until working length is reached
Irrigate inbetween
Take f2 into canal with single pass until working length is reached
what technique do we use for stage 1
watch winding
what is stage 1 called
scout canal and glide path
what files do we use for the glide path
10 +15 files
what is stage 2
coronal flare
what do we use for coronal flare
SX file with brushing motion
what is stage 3
establish working length
what technique do we use for stage 3
watch winding with the K10 file
what is stage 4
apical glide path
what do we use for apical glide path
K15
what is stage 5
coronal shaping
what do we use in stage 5
S1
S2
what is the torque in stage 2
4Ncm
what is the torque in stage 5 using S1
4
WHAT is the torque in stage 5 using S2
1.5
what is stage 6
apical finishing
what do we use in stage 6
F1
F2
F3
what is the torque in apical finishing F1
2 Ncm
what is the torque in apical finishing in F2,F3
3NCM
what is the point of endo irrigation
dissolution of organic tissue and plural remnants
dissolution of select inorganic components
killing of microorganisms and neutralisation of endotoxin
lubricate canals
when do we irrigate
between every file change
how do we irrigate
passing the tip of the irrigating needle to at least 3mm from our apical prep
Any further than 2mm from the needle tip remains unirrigated and classed as the dead zone “dead zone”
what is the dead zone
Any further than 2mm from the needle tip remains unirrigated
what needle is used for irrigation
27G placed 3mm from apex in a canal prepared to ISO 30
what flow rate do we aim for in canals
1ml in 15 seconds
what does chlorhexidine and hypochlorite do if mixed
white PPT formed and this is carcinogenic
signs of hypochlorite incidents
udden pain irrespective of the presence of LA. Profuse bleeding from within the canal. Extensive Oedema
management of hypochlorite incident
- action must be swift and communications with the patient honest and sympathetic without panic – seek immediate guidance from your tutor, don’t wait in the queue!!
- Irrigate the canal with saline
- Give additional local anaesthetic if required for pain relief
- Dress the canal with non-setting calcium hydroxide
- Inform and reassure the patient (anticipate severe oedema and bruising)
- Advise of analgesia – Paracetomol and Ibuprofen
- Arrange a further appointment to review the patient
