Summary:
•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
•Materials/Methods:
- 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.
Clinical significance:
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.