Perio & Hygiene Randomised controlled trial ✓ Peer reviewed

The Causal Effect of Supra- and Sub-Gingival Instrumentation on the Oral Microbiome of Elderly Periodontitis Patients Treated in Nursing Homes: Secondary Analysis of a Randomised Controlled Trial.

Journal of clinical periodontology · Barbe AG, Hagenfeld D, Walther C, Beck D, Farowski F, Vehreschild MJGT, Derman SHM, Bardenhorst SK, Bleiel D · 2026-08-19

Scaling and root planing delivered in nursing homes reduced microbial dysbiosis and improved clinical periodontal measures in elderly residents with periodontitis, with shifts toward a healthier bacterial profile.

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.

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