Karsiyaka Hendek M, et al. - Unstimulated salivary samples of 180 children were evaluated to assess the salivary LL-37 levels in passive smoking (PS)-exposed and PS-unexposed children and also to examine the relationship between salivary LL-37 levels and periodontal clinical parameters. They calculated periodontal clinical parameters like plaque index (PI), gingival index (GI), probing depth (PD), and clinical attachment level (CAL) among all candidates. Salivary cotinine and LL-37 levels were recorded by enzyme-linked immunosorbent assay. They found higher levels of PI and GI values in PS-exposed children as compared to those in PS-unexposed children. The mean salivary cotinine concentration was noted significantly higher in PS-exposed kids than in controls. They suggested the suppression of salivary LL-37 concentrations due to passive smoking in children.