Postobturation pain and associated factors in adolescent patients undergoing one- and two-visit root canal treatment

By Risso PA, Cunha AJ, Araujo MC, Luiz RR.

Date: 11/2008
Journal: Journal of Dentistvy


•Purpose:  evaluate the frequency and intensity of postobturation pain and associated factors in adolescents undergoing one- and two-visit root canal treatment.

•N= 121 teeth  


  • Patients aged between 11 -18 years; with lower first or second permanent molars presenting complete root formation and a necrotic pulp with or without symptoms, randomly assigned into two treatment groups: one- and two-visit (interappointment calcium hydroxide paste 10-12 days). Randomization (double-blind method)
  • 5.25% sodium hypochlorite (NaOCl) and neutralized with 5% sodium thiosulphate (Na2S2O3).
  • All cases were obturated with gutta-percha using a lateral compaction filling technique with zinc oxide-eugenol sealer.
  • Postobturation pain was recorded on a visual analogue scale after 6, 12, and 24 h (first day) up to 9 days.

Most highlighted Results: 

1.The frequencies of postobturation pain were 10.5% for the one-visit group and 23.0% for the two-visit group, but no statistically significant difference was found.

2.The intensity and duration of pain were similar for both treatment groups.

3.the frequency of flare- ups was 1.75% in the one-visit group and 1.65% in the two-visit group.

4.Postobturation pain was significantly associated with the presence of preoperative pain and a positive culture at the time of obturation.

Clinical significance:   

Effective micro- biological control and the presence of preoperative pain may influence the postobturation pain.