Effect of scaling and root planing with and without minocycline hydrochloride microspheres on serum biomarkers and acute phase reactants: A randomized clinical trial and 9- and 12-month follow-up.

Background: This study tests the effects of scaling and root planing (SRP) vs SRP with minocycline hydrochloride microspheres (MMs) (SRP with MM) on serum biomarkers interleukin (IL)-1β, IL-6, tumor necrosis factor-α, and matrix metalloproteinase-8 and acute phase reactants hemoglobin A Methods: Seventy participants were randomized to receive SRP (n = 35) or SRP+MM (n = 35). Serum was collected at baseline (before SRP), 1-month reevaluation visit, and 3- and 6-month periodontal maintenance visits. MMs were delivered to pockets 5 mm or larger immediately after SRP and immediately after the 3-month periodontal maintenance visit. Serum for acute phase reactants only was collected at the 9- and 12-month posttreatment follow-up. All outcomes were summarized using estimated marginal means back-transformed to the original response scale with 95% CIs. Results: At 6 months, no statistical significance was yielded in either group for IL-6 ( Conclusions: SRP alone and SRP+MM minimally reduced levels of cytokine biomarkers and acute phase reactants in self-reported systemically healthy patients with advanced stages of periodontitis. Thresholds for resolution of local clinical inflammation may not have been achieved in this study to result in a reduction of systemic inflammation.