Table 1. Number of Porphyromonas gingivalis colonies (CFU/mL) in the biofilm according to the He-APPJ treatment time.
| Group | SLA surface | P value | |||
|---|---|---|---|---|---|
| He gas | P value | He-APPJ | P value | ||
| Untreated control group | 14,392±5,215 | - | 13,520±3,790 | - | 0.829b) |
| 3-min treatment group | 1,476±269 | <0.001a) | 754±1,299 | <0.001a) | 0.426b) |
| 5-min treatment group | 1,773±946 | <0.001a) | 0 | <0.001a) | 0.033b) |
Data are shown as mean±standard deviation.
CFU: colony-forming unit, SLA: sandblasted and acid-etched, He: helium, He-APPJ: helium atmospheric-pressure plasma jet.
a)Statistically significant difference compared to the control group (1-way analysis of variance); b)Statistically significant difference between the He group and the He-APPJ group (Student t-test).