success or failure in endodontic treatment

Question 1

how is success of an RCT measured

Answer 1

should be measured at least 1 year and subsequently as followed

Question 2

what do we look for in successful RCT

Answer 2

We look for the absence of pain,swelling,other symptoms, no sinus tract, no loss of function and radiological evidence of a normal PDL space around the root ( takes the most time to achieve can take over a year)

Question 3

for how long do we assess a lesion

Answer 3

a minimum of 4 years

Question 4

what are some definitions of outcomes we can have

Answer 4

strict criteria by Strindberg

loose criteria by Toronto studies - more practical and sensible approach

Question 5

which factors are identified for the success or failure of endodontics

Answer 5

presence or absence of the lesion
filling extended all the way to 2mm of the radiographic apex
within the 2mm apex
well condensed root

Question 6

how do we stop bacteria getting back into the canals

Answer 6

good quality coronal restoration which involves good cusp coverage - normally indicated in the post teeth

Question 7

if there is a a sinus what happens to the failure rate

Answer 7

it increased

Question 8

if there is a increased lesion size what happens to the failure rate

Answer 8

increased

Question 9

what happens if we mix CHX and NaOCL together

Answer 9

they form a precipitate called para chloroalanine and block the canals

Question 10

what is para chloroalanine

Answer 10

it is a mixture of CHX and NaOCL which is toxic and blocks the canals by forming a precipitate