UNASSIGNED: The aim of the current research was to evaluate the antimicrobial effectiveness of chitosan-based tetracycline gel on periodontal pathogenic microorganisms.
UNASSIGNED: Preparation of chitosan-based tetracycline gel of 0.7% and 1% was done. In addition, 0.2 g of chitosan, 1% citric acid, and then 0.35 g of tetracycline in that order was added. Furthermore, 0.5 g of the tetracycline, which had been subjected to crushing and then stirring in a glass beaker to obtain a homogeneous gel was subjected to insertion into the syringe sterile. Such material prepared at the instance will attempt to investigate the sensitivity of bacteria in Surabaya to preserve the steadiness of the material. Evaluation of antimicrobial outcomes of chitosan-based tetracycline gel was performed against Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis.
UNASSIGNED: The highest region of inhibition was noted at 28.26 ± 1.08 mm, 23.98 ± 2.02 mm against A. actinomycetemcomitans and P. gingivalis at 1% chitosan-based tetracycline gel, in pursuit by the 0.7% chitosan-based tetracycline gel at 15.12 ± 0.16 mm and 14.48 ± 1.22 mm region of inhibition, followed by a control group that exhibited 4.16 ± 1.29 mm and 4.82 ± 1.20 mm regions of inhibition against either of the pathogens.
UNASSIGNED: To conclude, the chitosan-based tetracycline gel is efficient in restraining the growth of A. actinomycetemcomitans and P. gingivalis bacteria. Tetracycline 1% gel-based chitosan exhibited maximum antibacterial action since it depicted the maximum inhibition region diameter versus tetracycline gel 0.7%.

UNASSIGNED: Essential oils (EOs) have a considerable amount of therapeutic and preventive effect in treating dental diseases due to their wider potential as antibacterial and anti-inflammatory agents. EOs like virgin coconut oil, eucalyptus oil, peppermint oil thyme oil, and clove oil, when used in combination, may further have enhanced antimicrobial effects. However, limited information exists on the synergistic effect of these oils when used in combination, especially on the primary periodontal pathogen Porphyromonas gingivalis.
UNASSIGNED: The current study aims to compare the antimicrobial efficacy of commercially available EO on the periodontal pathogen, P. gingivalis, in comparison to chlorhexidine (CHX).
UNASSIGNED: Antimicrobial efficacy of EO and CHX was assessed at various concentrations against the periodontal pathogen P. gingivalis, by evaluating the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC).
UNASSIGNED: P. gingivalis was seen to be sensitive at a MIC of 100 μg/ml and 50 μg/ml concentration of the EO, which is regarded as the MIC of EO against P. gingivalis and CHX effectively inhibited microbial growth at 0.4 μg/ml.
UNASSIGNED: A combination of EOs possesses a potent antibacterial activity against P. gingivalis, and the antibacterial efficacy increases with increasing concentration of EOs.

Periodontal disease is one of the most common chronic diseases in the oral cavity that causes tooth loss. Root scaling and leveling cannot eliminate all periodontal pathogens, and the use of antibacterial agents or lasers can increase the efficiency of mechanical methods. The aim of this study was to evaluate and compare the antibacterial activity of cadmium telluride nanocrystals in combination with 940-nm laser diode. Cadmium telluride nanocrystals were prepared by a green route of synthesis in aqueous medium. The results of this study showed that cadmium telluride nanocrystals significantly inhibit the growth of P. gingivalis. The antibacterial property of this nanocrystal increases with increasing its concentration, laser diode 940-nm irradiation and with increasing the time. It was shown that the antibacterial activity of combination of 940-nm laser diode and cadmium telluride nanocrystals is greater than the effect of either alone and can have a similar effect with its long-term presence of microorganisms. This is very important because it is not possible to use these nanocrystals in the mouth and in the periodontal bag for a long time.

The present study aims to examine the expression of leukocyte adhesion molecules and renal metabolic factors in diabetic mouse kidneys with periodontal pathogen Pg-LPS-induced nephropathy.
We recently reported that the glomerular endothelium expresses toll-like receptor (TLR)2 and TLR4 in diabetic environments and TLR2/4 ligand Porphyromonas (P.) gingivalis lipopolysaccharides (Pg-LPS) induce nephropathy in diabetic mice. It is thought that Pg-LPS promotes the chronic inflammation with the overexpression of leukocyte adhesion molecules and renal-specific metabolic enzymes by the recognition of Pg-LPS via TLR in the diabetic kidneys. There have been no reports of the effects of periodontopathic bacteria on the expression of leukocyte adhesion molecules and the accumulation of physiologically active substances in the kidney.
The immunohistochemical investigation was performed on diabetic mouse kidney with Pg-LPS-induced nephropathy with glomerulosclerosis in glomeruli.
There were no vessels which expressed vascular cell adhesion molecule-1 (VCAM-1), E-selectin, or fibroblast growth factor (FGF) 23 in streptozotocin (STZ)-induced diabetic ICR mice (STZ-ICR), or in healthy ICR mice administered Pg-LPS (LPS-ICR). However, in diabetic ICR mouse kidneys with Pg-LPS-induced nephropathy (LPS-STZ) the expression of VCAM-1 and the accumulation of FGF23 were observed in renal tubules and glomeruli, and the expression of E-selectin was observed in renal parenchyma and glomeruli. The angiotensin-converting enzyme 2 (ACE2) was detected in the proximal tubules but not in other regions of ICR, STZ-ICR, or LPS-ICR. In LPS-STZ ACE2 was detected both in renal tubules as well as in glomeruli. The Mac-1 and podoplanin-positive cells increased in the renal parenchyma with diabetic condition and there was the distribution of a large number of Mac-1-positive cells in LPS-STZ.
The Pg-LPS may induce diabetic renal inflammation such as glomerulosclerosis and tubulitis with infiltration of Mac-1/podoplanin positive macrophages via glomerular overexpression of VCAM-1 and E-selectin, resulting in accumulation of both ACE2 and FGF23 which were unmetabolized with the inflammation-induced kidney damage under the diabetic condition. Periodontitis may be a critical factor in the progress of nephropathy in diabetic patients.

BACKGROUND: The Sri Lankan traditional betel quid (TBQ) which had been extensively used in the country before its colonization is claimed to have antiperiodontopathic effects in the Sri Lankan folklore. However, there is no reported scientific evidence to support the claimed antiperiodontopathic effects mediated by this TBQ. The present study was carried out to investigate the protective effect of the Sri Lankan TBQ in the pathogenesis of periodontitis.
METHODS: We investigate the ethyl acetate extract of the Sri Lankan TBQ for its antibacterial effects against the keystone periodontopathic bacterium, P. gingivalis and also its antioxidant potential, which is important to protect the periodontium from oxidative stress. Further, its safety was analyzed using the cytokinesis block micronucleus assay on human peripheral blood lymphocytes (PBLs).
RESULTS: Ethyl acetate extract of this TBQ inhibited the growth of P. gingivalis with a minimum bactericidal concentration (MBC) of 125 μg/ml. It was found to be a rich source of polyphenols and displayed considerable DPPH and ABTS radical scavenging activities and a strong ferric reducing antioxidant power. This extract could protect the cultured human gingival fibroblasts from H2O2 induced oxidative stress. In addition, this TBQ extract was not genotoxic to human PBLs even at a concentration of 2.5 mg/ml. Moreover, it exhibited protective effects against bleomycin induced genotoxicity in PBLs.
CONCLUSIONS: Ethyl acetate extract of the Sri Lankan TBQ is a source of natural antibacterial compounds against P. gingivalis. It is also a source of natural antioxidants which can protect human gingival fibroblasts from H2O2 induced oxidative stress. These properties of the TBQ may have contributed to its claimed antiperiodontopathic effects. Besides, it was found to be relatively non-toxic to human cells. Thus this TBQ extract has a huge potential to be developed as a novel adjunctive therapeutic lead against periodontitis.

BACKGROUND: High levels of tumor necrosis factor (TNF) receptors (TNFRs; TNFR1 and TNFR2), markers of inflammation, have been reported as significant predictors of mortality in hemodialysis patients. Porphyromonas gingivalis is a major pathogenic bacterium involved in periodontitis, which induces systemic inflammation. We investigated the association between the abundance of P. gingivalis in saliva and serum TNFR levels in hemodialysis patients.
METHODS: A cross-sectional study was conducted on 121 hemodialysis patients visiting a clinic in the Tokyo metropolitan area. Medical interviews and examinations, comprehensive dental examinations, bacterial examinations for P. gingivalis in saliva, and measurements of circulating TNFR levels were conducted. Multiple linear regression analysis was performed to evaluate the association between the number of P. gingivalis and circulating TNFR levels.
RESULTS: TNFR1 and TNFR2 were positively correlated with high-sensitivity C-reactive protein (hsCRP). Severe periodontitis was significantly associated with the number of P. gingivalis in saliva but not serum TNFR levels. The number of P. gingivalis was significantly associated with both TNFR1 and TNFR2 levels in sera after adjusting for age, sex, body mass index, smoking status, history of diabetes, prior cardiovascular disease events, serum levels of hsCRP and albumin, and severity of periodontitis [for TNFR1: coefficient 0.76, 95% confidence interval (CI) 0.14-1.37, p = 0.02; for TNFR2: coefficient 0.95, 95% CI 0.09-1.80, p = 0.03].
CONCLUSIONS: Circulating TNFR levels are associated with the number of P. gingivalis in saliva after adjusting for relevant clinical factors.

OBJECTIVE: To assess the adjunctive effect of probiotics to scaling and root planing in the management of chronic periodontitis.
UNASSIGNED: Thirty systemically healthy subjects in the age range of 20 - 55 years suffering from chronic generalized periodontitis were selected and randomly assigned to a control group of patients who received scaling and root planing (SRP) alone, or a test group of patients who received SRP supplemented with probiotic administration, i.e., Bifilac lozenges. The following baseline clinical parameters were recorded at selected teeth: plaque index, gingival index, probing pocket depth and relative attachment level. Microbiological counts of Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis and Prevotella intermedia were assessed in pooled subgingival plaque samples. The parameters were recorded again at 30 days, 45 days and 3 months from baseline.
RESULTS: Statistically significant reductions were observed for plaque index, gingival index, and probing pocket depth, and a significant gain in relative attachment level in both groups. Microbiological analysis showed significant reduction for P. gingivalis at all recall intervals in the test group compared to controls. The intergroup comparison for differences in mean counts of P. gingivalis was found to be significant for the test group at 3 months (p = 0.028).
CONCLUSIONS: Probiotics can be considered as a potentially safe and effective adjunct to scaling and root planing in the management of chronic periodontitis.

BACKGROUND: Published literature till date reveals a high prevalence of Porphyromonas gingivalis fimA type I genotype among healthy subjects. Quite a few studies have reported its prevalence also in periodontitis patients. Nevertheless incidence of this genotype in gingivitis is lacking in adult population.
OBJECTIVE: The present study was chosen to detect P. gingivalis fimA type I genotype among chronic gingivitis patients.
METHODS: A total of 46 subgingival plaque samples collected from chronic marginal gingivitis (n=23) and chronic periodontitis subjects (control group) (n=23) were subjected to Real-Time Polymerase Chain Reaction to detect the P. gingivalis fimA type I gene. Statistical analysis was performed using chi-square test.
RESULTS: Prevalence of P. gingivalis fimA type I gene among chronic periodontitis and chronic gingivitis patients were 8.7% and 30.4% respectively. P. gingivalis fimA type I genotype prevalence was found to be statistically insignificant between the two study groups (p=0.135).
CONCLUSIONS: The avirulent P. gingivalis fimA type I genotype, occurred in high prevalence among chronic gingivitis patients, while its presence was low in chronic periodontitis patients. Presence of this avirulent genotype in chronic marginal gingivitis signifies its reversible condition.

BACKGROUND: Bacteremia frequently occurs after treatment procedures such as extractions, scaling, root planing, periodontal surgery. There is currently significant interest in the possibility that bacteremia with oral bacteria may play role in pathogenesis of atherosclerosis. There are well-conducted studies that have determined the frequency of passage of periodontal microorganisms to the bloodstream after periodontal treatment. There is scarce information related to the incidence of periodontopathic microorganisms during bacteremia induced by this procedure.
OBJECTIVE: The aim of this study was to establish the frequency of passage of periodontopathic microorganisms in peripheric blood after scaling and root planing in patients with periodontitis.
METHODS: Forty subjects with chronic periodontitis were included in the study. Blood samples were drawn from each patient at following intervals pre-treatment i.e., before SRP (P1), immediately after SRP (P2), and 30 minutes after SRP (P3). Following SRP, blood samples were analyzed for following microorganisms: Porphyromonasgingivalis, Tannerella. forysthus, Eikenellanella. corrodens, Campylobacter species, Micromonas. micros, and Prevotella. intermedia.
METHODS: Chi-square test.
RESULTS: Bacteremia was found in 70% (28/40) immediately after SRP and after 30 min, it was reduced to 25% (10/40) and 7.5% (3/40) presented bacteremia before SRP.
CONCLUSIONS: It was concluded that bacteremia frequently occurs immediately after SRP with P. gingivalis showing the highest frequency in blood.