Abstract

This study evaluated the effectiveness of a novel pocket therapy (Er:YAG laser-assisted comprehensive periodontal pocket therapy [Er-LCPT]) for residual pocket treatment, compared with conventional mechanical treatment alone, in a randomized controlled clinical trial. Two sites in 18 patients having residual periodontal pockets of ≥5mm depth, extant following initial active therapy, or during supportive therapy, were randomized into two groups in a split mouth design: the control group received scaling and root planing (SRP) by curette, and the test group received Er-LCPT using curette and laser. With Er-LCPT, after root debridement, inflamed connective tissue on the inner gingival surface and on the bone surface/within extant bone defects was thoroughly debrided. Furthermore, removal of proximate oral epithelium and coagulation of the blood clot in the pocket entrance were performed with laser. Clinical parameters were evaluated, before and after treatment, through 12months. Both groups showed significant improvements in clinical parameters. With Er-LCPT, pocket debridement was thoroughly and safely performed, without any adverse side effects and complications, and favorable healing was observed in most of the cases. At 12months, Er-LCPT demonstrated significantly higher probing pocket depth reduction (2.78mm vs. 1.89mm on average; p=0.012, Wilcoxon signed-rank test), clinical attachment gain (1.67mm vs. 1.06mm; p=0.004) as primary outcomes, and reduced BOP value (0.89 vs. 0.56; p=0.031), compared with SRP alone. The results of this study indicate that Er-LCPT is more effective for residual pocket treatment, compared with SRP alone.

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