Salivary Melatonin and MMP-9 Levels in Stage III Periodontitis: A Pilot Study Using Standardized Pre-Sleep Saliva Collection.

Researchers compared salivary melatonin and MMP-9 levels in people with stage III periodontitis versus periodontally healthy individuals, finding significantly lower melatonin in the periodontitis group but no significant difference in MMP-9, with melatonin showing preliminary potential to distinguish between the two conditions.

A plain-English summary of the study's own findings — we don't add our own claims or interpretation. Read the full paper for the complete methods and results, and apply your own clinical judgement.