Salivary Neuropeptide Y, Interleukin-18, Tight Junction Proteins and Malondialdehyde as a Neuroimmune-Barrier Panel in Periodontitis
Salivary neuropeptide Y, interleukin-18 and malondialdehyde are independently associated with periodontitis, whereas salivary tight junction proteins track disease severity without independent association, consistent with downstream barrier injury.