This study compared the clinical effects of scaling and root
planing (SRP) after the adjunctive subgingival administration of
Andrographis paniculata (AP) gel or placebo (PB) gel in a 6-
month clinical trial for patients with chronic periodontitis. The
study was a split-mouth, single-blind, randomized and controlled
clinical trial that compared two treatment modalities (SRP+PB
and SRP+AP) in single-rooted teeth with a probing depth (PD) of
5 mm or more. The clinical parameters, including PD, clinical
attachment level (CAL), plaque index (PI), gingival index (GI),
bleeding on probing (BOP), and radiographic examinations were
recorded at baseline, 3 months and 6 months. The results showed
that both treatment groups significantly improved with regard to
clinical parameters (p0.05), although SRP+AP
showed a greater PD reduction than SRP+PB (p