Table 3: Visual Analogue Scale (VAS) scores of 52 teeth expressed in median, lower (25% percentile) and upper (75% percentile) before and after treatment with ozone and air at Baseline, and at follow up after three months (V1).

VAS Median 25e percentile 75e percentile
Baseline Before treatment ozone and air 5.0 3.0 7.0
After treatment ozone and air 2.0 1.0 4.0
V1 (3-months control) Before treatment ozone and air 4.0 2.0 6.0
After treatment ozone and air 2.0 1.0 3.5