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Objective: To compare the long-term results between single and multiple adjunctive Er,Cr:YSGG application to scaling and root planing (SRP) in periodontal maintenance patients with residual periodontal pockets.
Materials and methods: Twelve periodontal maintenance patients treated with single Er,Cr:YSGG application + SRP in one tooth (group A) and multiple Er,Cr:YSGG application + SRP in the other tooth (group B) were evaluated 3 years after treatment. Plaque index (PI), bleeding on probing (BOP), probing depth (PD), relative probing attachment level (RPAL), and relative gingival recession (RGR) were examined.
Results: Percentage of plaque presence (PI=1) sites were consistent in both groups, with no significant difference between groups. Percentages of BOP sites at the 3-year follow-up were lower than the baseline in both groups. PD reduction at 3 years was significantly different from the baseline (group A; 2.00 ± 1.35 mm vs group B; 1.33 ± 1.23 mm), while RPAL gain was clinically significantly different from the baseline only in group A (1.42 ± 1.56 mm). In group B, gingival recession statistically significantly increased at 3 years (0.75 ± 0.75 mm) from the baseline. All changes of clinical parameters showed no statistically significant differences when compared between groups.
Conclusion: Both single and multiple applications of adjunctive Er,Cr:YSGG laser improved clinical results regarding decreased BOP and PD reduction. RPAL gain was only observed in the single application group. No statistically significant differences were found between the two treatment modalities 3 years after the initial treatment.
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