Effects of Polynucleotides and Hyaluronic Acid Based Subgingival Periodontal Pockets Re-instrumentation

The aim of the present study was to investigate the clinical and biochemical efficacy of a gel containing polynucleotides (PDRN) and hyaluronic acid (HA) used in association with subgingival re-instrumentation in the treatment of residual periodontal pockets. 50 patients were enrolled in a randomized, split-mouth clinical trial. For each patient, two teeth with similar residual pockets with probing depth (PD) ≥ 5 mm were selected to receive re-instrumentation with (test) or without (control) the adjunctive use of a PDRN and HA based gel. Differences in changes of PD, gingival recession (REC), clinical attachment level (CAL), modified sulcular bleeding index (mSBI), plaque index (PLI) from baseline to 6, 8, 24, 36 and 48 weeks were analyzed and the frequencies of sites with PD \<4 mm at 48 weeks were compared. Furthermore, changes in the dosage of alpha-2-macroglobulin (α2M) and of matrix metalloproteinase-9 (MMP-9) from baseline to 6 weeks were evaluated.