Endo 9 - Obturation Flashcards

1
Q

What are the 4 aims of obturation

A
  • Prevents bacteria and their toxins percolating into the periradicular tissues
  • Seals the remaining bacteria in the root canal system in an environment that they cannot thrive
  • Prevent percolation of periradicular exudate (the nutrient supply for the bacteria) into the root canal space
  • Prevent reinfection of the root canal system from the coronal aspect
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What conditions should be met about the preparation of the canal before obturation

A
  • Tooth must be asymptomatic
  • temporary dressing must be intact
  • No sinus present
  • Root canal must be dry
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What materials can be used as a filling material for obturation

A
  • Gutta Percha almost always

- Can use acrylic, pastes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why are some medicated pastes like endomethosone not recommended

A

they may contain paraformaldehyde which is cytotoxic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Give some examples of root canal sealers

A
  • ZOE sealers
  • CH sealers
  • Resin sealers
  • GI sealers
  • Bioceramic sealers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Describe the cold lateral condensation obturation technique

A
  • Rubber dam
  • Try in finger spreader and should be loose in canal to the WL
  • Fit master GP to full WL, which will ideally have some tug back
  • Dry canal
  • Coat master GP with sealer and place to WL
  • Place finger spreader 1mm from working length
  • Then yeah measure accessory cones to the same length at the spreader an then take a mid fill radiograph not a master cone radiograph
  • Continue until canal is filled
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What 3 things do we assess post RCT to determine how sick the root filling is

A
  • Length - same as WL
  • Quality of condensation = no voids
  • Taper - adequate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do we assess if the root canal was successful

A

Radiograph shows healing at the periapical lesion and shit and the patient is asymptomatic u know

How well did you know this?
1
Not at all
2
3
4
5
Perfectly