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    Öğe
    Effect of Initial Periodontal Therapy on Oxidative Stress Markers in Gingival Crevicular Fluid, Saliva, and Serum in Smokers and Non-Smokers With Chronic Periodontitis
    (Wiley, 2015) Hendek, Meltem Karsiyaka; Erdemir, Ebru Olgun; Kisa, Ucler; Ozcan, Gonen
    Background: The aim of this case-control study with an intervention arm is to determine the effect of initial periodontal treatment on oxidative stress biomarkers in smokers and non-smokers with chronic periodontitis (CP). Methods: The study included 47 patients with CP (24 smokers [S+ P+] and 23 non-smokers [S-P+]) and 46 periodontally healthy individuals (23 smokers [S+ P-] and 23 non-smokers [S-P-]) for a total of 93 participants. Gingival crevicular fluid (GCF), serum, and saliva samples were obtained and clinical periodontal measurements were recorded at baseline and at the first and third months after periodontal therapy. 8-hydroxydeoxyguanosine (OHdG) and 4-hydroxynonenal (HNE) and enzyme activity of glutathione peroxidase (GSH-Px) were analyzed with enzyme-linked immunosorbent assay. Results: The level of 8-OHdD in GCF was found to be significantly higher in both periodontitis groups compared with both periodontally healthy groups. 8-OHdG and GSH-Px in saliva in both periodontitis groups were significantly increased compared with the S-P-group. In the S+ P+ group, 4-HNE in GCF was found to be significantly higher than in periodontally healthy participants. After initial periodontal treatment, the levels of 8-OHdG in GCF and saliva were significantly decreased in both periodontitis groups. Conclusion: Initial periodontal therapy may be helpful for diminishing oxidative stress in periodontitis.
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    Öğe
    Prophylactic and therapeutic effects of (6)-shogaol on alveolar bone loss in experimental periodontitis
    (Istanbul Univ Press, Istanbul Univ Rectorate, 2024) Bezirci, Didem; Hendek, Meltem Karsiyaka; Ozcan, Gonen; Kul, Oguz; Anteplioglu, Tugce; Olgun, Ebru
    Purpose (6)-Shogaol is the most prevalent bioactive compound in ginger. The aim of this study was to examine both the prophylactic and therapeutic effects of (6)-shogaol in an experimental periodontitis model. Materials and Methods Thirty-five male Wistar albino rats were divided into four groups. In the healthy group (n=5), no intervention was undertaken. In the periodontitis group (n=10), periodontitis was induced by ligature placement for 14 days. In the prophylaxis group (n=10), periodontitis was induced with ligature placement for 14 days, and during this time, 20 mg/kg/day of (6)-shogaol was administered via oral gavage. In the therapeutic group (n=10), periodontitis was induced with ligature placement for 14 days, and following the removal of the ligature, 20 mg/kg/day of (6)-shogaol was administered via oral gavage for 14 days. Alveolar bone loss was histometrically measured, and malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GP), nuclear factor kappa B (NF-kappa B), receptor activator of nuclear factor kappa B ligand (RANKL), and osteoprotegerin (OPG) were immunohistochemically analyzed. Results Alveolar bone loss was significantly lower in the healthy group than in the remaining groups, as well as in the therapeutic group than in the periodontitis group (p<0.001). RANKL/OPG was significantly higher in the periodontitis group compared to the remaining groups and in the prophylaxis group compared to the therapeutic group (p<0.001). MDA was significantly lower in the healthy group than in the remaining groups (p<0.001). SOD was significantly lower in the periodontitis group than in the prophylaxis and therapeutic groups (p=0.039 and p=0.042, respectively). GP was significantly lower in the healthy group than in the prophylaxis and therapeutic groups (p=0.031 and p=0.002, respectively). Conclusion The administration of (6)-shogaol modulated the RANKL/OPG balance and antioxidant status in rats with ligature-induced periodontitis.