[One-year control examination of therapy of chronic apical periodontitis treated by single visit method].

The results of one year control-examination of the single visit endodontic therapy of chronic apical lesions are presented. Clinical and radiographic control examinations were performed on 40 of 58 treated single and double root canal teeth from both jaws. Eighty percent of treated teeth was found to be successful. Endodontic failure was found in 15%, while 5% of treated teeth were extracted due to prosthodontic or some other reason. No relation between the incidence of early postoperative discomforts and endodontic failure was found. The incidence of therapy was higher in teeth with primarily closed cavum dentis than in cases with open cavum dentis prior to therapy.