JAVMA 2018: Radiographic outcome of root canal treatment of canine teeth in cats: 32 cases (1998–2016)

Question 1

who is the author?

Answer 1

Peter Strom B. Arzy M. Lommer F. Verstraete …

Question 2

what is the suggested protocol for radiographic re-examination of RCT in cats?

Answer 2

minimum of 1 year follow-up, as long as 4 years to be judged a success

Question 3

what were the criteria for success, NEF and failure in this study?

Answer 3

Successful: if the periapical PDL space was within reference limits and preoperative EIRR, if present, had stabilized. NEF: if preoperative EIRR had stabilized and preexisting PL remained the same or decreased in size but had not completely resolved. Failure: if PL or EIRR developed subsequent to endodontic treatment or preexisting PL had increased in size or preoperative EIRR appeared to have progressed after RCT.

Question 4

in this study, what what the sole reason teeth underwent RCT?

Answer 4

CCF

Question 5

37 teeth were rechecked. How many were successul, NEF and failed?

Answer 5

Success: 18 - 49% NEF: 12 - 32% Failed: 7 - 19%

Question 6

what obturation technique was associated with overfill?

Answer 6

twice as frequent when vertical compaction with thermoplastic GP was used

Question 7

how were voids in the obturation material associated with outcome?

Answer 7

Voids in the apical 1/3 had a 5x increase in the rate of failure, but P value was not significant (p - 0,069)

Question 8

how did periapical EIRR affect outcome?

Answer 8

10x increase of failure, P = 0,012

Question 9

what variables were associated with an increased risk of failure?

Answer 9

preexisting EIRR age at time of tx obturation voids (not significant but close) 2 years after RCT (associated with root resorption or failure of AP to resolve)