Outcome of non-surgical endodontic treatment

grantor: University of TorontoThis historical cohort study examined the outcome of non-surgical endodontic treatment and the influence of various factors on the outcome. Patients treated by Graduate Endodontics students were re-examined after 4 to 6 years by an independent investigator. Outcome criteria were dichotomous--the periradicular tissues were classified as "healed" or "diseased". For Initial Treatment, 81% of the teeth were healed. The healing rate was 18% higher for teeth without pre-operative Apical Periodontitis than those with Apical Periodontitis (p < 0.01). For Retreatment, 71% of the teeth were healed. The healing rate for teeth with pre-operative perforation was 53% lower than for all other teeth (p < 0.001). In conclusion, Apical Periodontitis was the major factor that influenced the outcome of Initial Treatment, while a pre-operative perforation was the major factor that influenced the outcome of Retreatment.M.Sc