Table 1 Overview of success in endodontic treatment (From Friedman12)

From: Endodontic problems

Treatment procedure Weighted average success of reports in approximately the past 50 years Weighted average success of reports in approximately the past 10 years
Endodontic treatment of teeth without periapical periodontitis 34 studies Range from 100% to 67% Weighted average 91% 6 studies Range from 100% to 88% Weighted average 93%
Endodontic treatment of teeth with periapical periodontitis 38 studies Range from 96% to 38% Weighted average 76% 8 studies Range from 94% to 46% Weighted average 77%
Endodontic treatment of teeth with periapical periodontitis using calcium hydroxide intervisit dressing   6 studies since 1987 Range from 86% to 69% Weighted average 79%
Orthograde endodontic retreatment in teeth with periapical periodontitis 9 studies Range from 88% to 48% Weighted average 70% 3 studies Range from 74% to 56% Weighted average 62%
Periradicular surgery in teeth with periapical periodontitis 29 studies Range from 95% to 30% Weighted average 59% 11 studies Range from 81% to 30% Weighted average 63%