Table 4. Results for incidence of postoperative pain using VRS and flare-up according to assessment time and protocol of endodontic treatment.
| HFLC (n = 60) | SFSC (n = 58) | Relative riska (95% CI) | Risk difference (95% CI) | P-valueb | Pooled incidence (n = 118) | |
|---|---|---|---|---|---|---|
| Baseline | 5 (8.3%) | 7 (12.1%) | 1.40 (0.46 to 4.18) | 3.7% (-7.2% to 14.7%) | 0.70 | 12 (10.2%) |
| Peak of pain at first 24 h | 26 (43.3%) | 22 (38.0%) | 0.87 (0.56 to 1.35) | 5% (-12% to 23%) | 0.55 | 28 (43.3%) |
| After 24h | 10 (16.7%) | 13 (22.4%) | 1.34 (0.64 to 2.82) | -6% (-20% to 8%) | 0.43 | 23 (17.0%) |
| After 72h | 5 (8.3%) | 4 (6.9%) | 0.82 (0.23 to 2.93) | 1.4% (-8% to 11%) | 0.77 | 9 (8.3%) |
| After 7 days | 1 (1.7%) | 1 (1.8%) | 1.05 (0.06 to 16.42) | -0.1% (-4.7% to 4.6%) | 0.99 | 2 (1.7%) |
| Flare-up | 2 (3.3%) | 2 (3.4%) | 1.07 (0.15 –to 7.34) | 0.1% (-6% to 6%) | 0.98 | 4 (3.3%) |
HFLC,Hand File, Lateral Compaction technique; SFSC,Single-file and single-cone technique; CI,Confidence Interval; VRS, Verbal Rating Scale
a—Calculated using HFLC as control.
b—Chi square test.