Endodontic treatment of teeth with apical periodontitis: single vs. multi-visit treatment

By Trope M, Delano O, Orstavik D

Date: 07/2000
Journal: JOE


Purpose: To evaluate radiographic healing of teeth with apical periodontitis treated in (a) 1 visit or (b) 2 visits, either without or with the addition of calcium hydroxide as an intracanal medicament

N= 102 cases                                                                                                           Inclusion: Teeth with AP


•The patients were assigned randomly into 3 treatment groups:

 (O: single visit, C: multiple visits with CaOH for at least 1 week, E: multiple visits without CaOH)

•All the patients were treated by 1 operator with standardized instrumentation technique, irrigation with 2.5% NaOCl and obturation with laterally condensed GP and Roth 801 sealer.

•9 observers evaluated the healing radiographically after 1 year using (PAI) Scoring

Most highlighted Results:

When the base line PAl scores were controlled (PAI > 3):

•CaOH group: showed the most improvement in PAl score (3, 4, or 5 to 1 or 2), (74%)  were healing •Single visit group: (64%) were healing

•The teeth that were left empty between visits had clearly inferior healing results

Clinical significance

The additional disinfecting action of CaOH before obturation resulted in a 10% increase in healing