Clinical and microbiological effect of scaling and root planing in smoker and non‐smoker chronic and aggressive periodontitis patients

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Abstract
Objectives: To compare the effects of scaling and root planing (SRP) on clinical and microbiological parameters at selected sites in smoker and non‐smoker chronic and generalized aggressive periodontitis patients. Materials and Methods: Clinical parameters including probing depth (PD), relative attachment level (RAL), and bleeding upon probing (BOP), and subgingival plaque samples were taken from four sites in 28 chronic periodontitis (CP) and 17 generalized aggressive periodontitis (GAgP) patients before and after SRP. Polymerase chain reaction assays were used to determine the presence of A. actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythensis, Prevotella intermedia and Treponema denticola. Results: Both CP and GAgP non‐smokers had significantly greater reduction in pocket depth (1.0±1.3 mm in CP smokers versus 1.7±1.4 mm in non‐smokers, p=0.007 and 1.3±1.0 in GAgP smokers versus 2.4±1.2 mm in GAgP non‐smokers, pTannerella forsythensis in CP sites (smokers 25% increase and non‐smokers 36.3% decrease, pPrevotella intermedia at GAgP sites (smokers 25% reduction versus 46.9% in non‐smokers, p=0.028). Conclusion: SRP was effective in reducing clinical parameters in both groups. The inferior improvement in PD following therapy for smokers may reflect the systemic effects of smoking on the host response and the healing process. The lesser reduction in microflora and greater post‐therapy prevalence of organisms may reflect the deeper pockets seen in smokers and poorer clearance of the organisms. These detrimental consequences for smokers appear consistent in both aggressive and CP.

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