What question did this study set out to answer?

The study aimed to evaluate the effects of immunomodulators combined with antibiotics in treating periodontitis.

Immunomodulators, associated or not with systemic antibiotics, to treat periodontitis: A 1‐year multicenter, placebo‐controlled, double‐blind, randomized clinical trial

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Randomized trial evaluates the effectiveness of immunomodulators in severe periodontitis, suggesting improved outcomes without combined therapies.

The study aimed to evaluate the effects of immunomodulators combined with antibiotics in treating periodontitis.
Randomly assigned 109 adults with stage III/IV periodontitis to four treatment groups: placebo, antibiotics, immunomodulators, or both.
Each treatment included subgingival instrumentation, administered over 1 year.
Post-therapy follow-up assessed treatment success based on probing depth reduction.
At 1 year, 58.6%, 57.7%, and 57.1% of patients with antibiotics, immunomodulators, and both achieved treatment endpoints, respectively, compared to 23.1% in the placebo group (p = 0.023).
All adjunctive therapies led to a greater reduction in probing depth compared to the placebo group (p < 0.05).
Combining antibiotics with immunomodulators did not show added benefits beyond using either treatment alone.

Santos et al. (2026) studied this question.

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Randomized trial evaluates the effectiveness of immunomodulators in severe periodontitis, suggesting improved outcomes without combined therapies.