Incidence of postoperative pain after one-appointment endodontic treatment of asymptomatic pulpal necrosis in single-rooted teeth.

By Mulhern JM, Patterson SS, Newton CW, Ringel AM.

Date: 12/1982

Purpose: to investigate the incidence of postoperative pain after one-appointment nonsurgical endodontic treatment of asymptomatic pulpal necrosis in single-rooted teeth that had no sinus tracts.

•N= 60 patients (60 single rooted teeth: 30 test, 30 control).

Inclusion: patients with asymptomatic mature single rooted teeth with necrotic pulp.

Excluded: patients who were  medically compromised, taking corticosteriods or antibiotics for other reason than the tooth treated.


•the patients were treated by 2 postgraduate students and were randomly assigned into test group: 30 patients treated in single visit, and control: 30 patients treated in 3 visits.

•For the control group: in the 1st visit: teeth isolated, all the caries removed, a sample of canal contents was taken with paper points, the pulpal debris removed with barbed broaches and initial incremental instrumentation was performed. in the 2nd visit: root canal preparation was completed. the 3rd visit: obturation with GP by lateral condensation.

•For the test group: the same procedures performed in a single visit.

•all the patients were given a questionnaire to record the pain and were examined clinically one week post operatively.

Most highlighted Results: 

•There was no significant difference in the occurrence of pain between the one-appointment and multi-appointment treatment groups.

•Age, race, tooth position, periapical radiolucent areas, results of bacterial culture, canal humidity, and amount of initial filing did not appear to influence the pain experience

•Females experienced significantly more pain in the control group only.

Clinical significance: 

No difference in pain experience in cases treated in single or multiple visits.