Fig. 3

Mean (±SD) full-mouth periodontal parameters of participants from baseline to 12 months following periodontal treatment commencement. a Pl %, b BOP %, c PPD, d PAL, Dashed line placebo group; solid line mYJ group. No difference observable regarding mean Pl %, BOP % and PPD between test and control groups at any follow up time point while significant reduction was discernible regarding these three clinical parameters from base-line to all follow ups (a–c, P < 0.01, repeated measures ANOVA with Dunnett’s post-test). No difference observable in mean PAL between test and control groups at any time point and between baseline and all four time points for the test group, or up to 9 months for control group, while significant reduction of mean PAL from baseline was observable at month-12 in control group (P < 0.01, repeated measures ANOVA with Dunnett’s post-test)