•Purpose: to record the 2-year clinical and radiographic outcome of one- and two visit endodontic treatment and study the significance of the bacteriologic sampling results on the outcome.
•n: 94 patients with asymptomatic teeth with necrotic pulps and apical periodontitis
- Patients were randomly assigned to one- or two-visit treatment. Two randomization factors were considered: tooth group and size of periapical lesion (Table 1).
- Canals were enlarged (GT/ Profile) and/or hand (Nitiflex), to #20 at WL. Initial microbiological samples. Canals were then enlarged to #40 < under 0.5% NaOCl irrigation. Post-instrumentation microbiological samples.
- For the one-visit group: smear layer removed with Tubulicid Plus. Then, 5% IPI for 10 minutes. Postmedication microbiological sample.
- For the two-visit group: CH placed for aa week, CH was removed. A postmedication microbiological sample.
- Both groups were obturated using cold lateral condensation including rosin chloroform as sealer.
- Two examiners blindly and independently evaluated all radiographs 2 years postoperatively. Size of PA – RL was assessed by measuring with a ruler. Outcome was classified by using a modification of the Strindberg criteria.
Most highlighted Results:
1.(65%) in the one-visit group and (75%) in the two-visit group were classified as healed. No significant difference between the groups.
2.(80%) of the 61 teeth that were obturated after –ve sample were classified as healed. Teeth sealed after positive samples healed in (44%). However, No significant difference in outcome in the presence or absence of detectable microbes just before obturation.
Similar outcome results between single and two visits Tx in cases with asymptomatic teeth with necrotic pulps and apical periodontitis. A tendency toward a more favorable outcome in teeth yielding a –ve culture immediately before root filling.