Endodontic Failure

Question 1

What is considered a successful RCT after 1 year?

Answer 1

• absence of pain, swelling or other symptoms
• no sinus tract
• no loss of function
• radiological evidence of a normal PDL

Question 2

What operative factors contribute to success of RCT?

Answer 2

• within 2mm of radiographic apex
• well condensed with no voids
• good quality coronal restoration

Question 3

What influences re-treatment decision making?

Answer 3

• establish cause of failure
  
  • technical
    - perforation
    - separated instrument
  • root fracture
  • other odontogenic pain
  • non-odontogenic pain
    - atypical face pain

Question 4

What factors are involved in assessing the restorative prognosis?

Answer 4

• presence of fractures
• remaining tooth structure
• good seal achievable?

Question 5

How is GP removed for re-treatment

Answer 5

• poorly condensed
  
  • generally easier
  • Hedstroem files
• well condensed
  
  • generally harder
  • requires space to be created
  • handfiles and solvent