Effect of non-surgical periodontal therapy on glycemic control of type 2 diabetes mellitus: a systematic review and Bayesian network meta-analysis.

BACKGROUND: Glycemic control is vital in the care of type 2 diabetes mellitus (T2DM) and is significantly associated with the incidence of clinical complications. This Bayesian network analysis was conducted with an aim of evaluating the efficacy of scaling and root planning (SRP) and SRP + adjuvant treatments in improving glycemic control in chronic periodontitis (CP) and T2DM patients, and to guide clinical practice. METHODS: We searched the Pubmed, Embase, Cochrane Library and Web of Science databases up to 4 May 2018 for randomized controlled trials (RCTs). This was at least three months of the duration of study that involved patients with periodontitis and T2DM without other systemic diseases given SRP. Patients in the control group did not receive treatment or SRP combination with adjuvant therapy. Outcomes were given as HbA1c% and levels fasting plasma glucose (FPG). Random-effects meta-analysis and Bayesian network meta-analysis were conducted to pool RCT data. Cochrane's risk of bias tool was used to assess the risk of bias. RESULTS: Fourteen RCTs were included. Most were unclear or with high risk of bias. Compared to patients who did not receive treatment, patients who received periodontal treatments showed improved HbA1c% level, including SRP (the mean difference (MD) -0.399 95% CrI 0.088 to 0.79), SRP + antibiotic (MD 0.62, 95% CrI 0.18 to 1.11), SRP + photodynamic therapy (aPDT) + doxycycline (Doxy) (MD 1.082 95% CrI 0.13 to 2.077) and SRP + laser (MD 0.66 95% CrI 0.1037, 1.33). Among the different treatments, SRP + aPDT + Doxy ranked best. Regarding fasting plasma glucose (FPG), SRP did not show advantage over no treatment (MD 4.91 95% CI - 1.95 to 11.78) and SRP with adjuvant treatments were not better than SRP alone (MD -0.28 95% CI -8.66, 8.11). CONCLUSION: The results of this meta-analysis seem to support that periodontal treatment with aPDT + Doxy possesses the best efficacy in lowering HbA1c% of non-smoking CP without severe T2DM complications. However, longer-term well-executed, multi-center trails are required to corroborate the results.

Quantification of TNF-α in Patients with Periodontitis and Type 2 Diabetes.

OBJECTIVE: The present study aimed to compare variations in quantified tumor necrosis factor-alpha (TNF-α) levels in patients with periodontitis stage 2 grade B (POD2B) and/or type 2 diabetes (T2D) and to identify any relationships between this cytokine and these diseases. METHODS: Levels of the cytokine TNF-α in gingival crevicular fluid in patients with POD2B and/or T2D were evaluated. A total of 160 subjects were distributed into four groups: those with POD2B (n=44); those with T2D (n=37); those with POD2B/T2D (n=40); and healthy subjects (n=39). Glycosylated hemoglobin (HbA1c) and blood glucose (BG) levels were quantified in each subject. Data were collected on body mass index (BMI), loss of insertion (LI), and probe depth (PD). Gingival crevicular fluid samples were collected from the most acutely affected periodontal pocket and gingival sulcus in each subject, and TNF-α was quantified by multiplex analysis. RESULTS: Kruskal Wallis tests was used to identify differences in TNF-α levels, LI, PD, BMI, BG, and HbA1c by group. Differences (p<0.001) were found for LI, PD, BG, and HbA1c. A Spearman test was used to calculate possible correlations between TNF-α levels and LI or PD identified a weak but significant negative correlation of TNF-α with LI (Rho=-0199; p=0.012), and a moderately positive correlation of LI with PD (Rho=0.509; p < 0.001). CONCLUSIONS: No variation was found between TNF-α levels and the presence of POD2B, POD2B/T2D, or T2D, suggesting the absence of any direct relationship between progression of these diseases and TNF-α levels. However, a correlation was present between low TNF-α concentrations and greater LI.

Aberrant Periodontal and Systemic Immune Response of Overweight Rodents to Periodontal Infection.

This study aimed to explore periodontal and systemic immune response of overweight hosts to periodontitis. Forty C57 BL/6J male mice were divided into high (HF) or low fat (LF) diet groups and fed with the two diets, respectively, for 8 weeks. Each diet group was then divided into periodontitis (P) or control (C) groups (n = 10 per group) for 10-day ligation or sham-ligation. Overweight-related parameters including body weight were measured. Alveolar bone loss (ABL) was morphometrically analyzed and periodontal osteoclasts were stained. Periodontal immune response including leukocyte and macrophage number and inflammatory cytokines were analyzed by histology and quantitative PCR. Serum cytokine and lipid levels were quantified using electrochemiluminescence immunoassays, enzyme-linked immunosorbent assays, and biochemistry. It was found that HF group had 14.4% body weight gain compared with LF group (P < 0.01). ABL and periodontal osteoclast, leukocyte, and macrophage number were higher in P group than C group regardless of diet (P < 0.05). ABL and periodontal osteoclast number were not affected by diet regardless of ligation or sham-ligation. Leukocyte and macrophage number and protein level of tumor necrosis factor α (TNF-α) in periodontium and serum interleukin-6 level were downregulated by HF diet in periodontitis mice (P < 0.05). Periodontal protein level of TNF-α was highly correlated with serum interleukin-6 and low-density lipoprotein cholesterol levels (P < 0.01). These findings indicated that impaired immune response occurs both periodontally and systemically in preobesity overweight individuals. Given a well-reported exacerbating effect of obesity on periodontitis, overweight, if let uncontrolled, might place the individuals at potential risk for future periodontal tissue damage.

Total and Differential Leukocyte Counts in the Peripheral Blood of Patients with Generalised Aggressive Periodontitis.

PURPOSE: To compare the total and differential leukocyte counts in the peripheral blood of generalised aggressive periodontitis patients with that of periodontally healthy subjects in a central Indian population. MATERIALS AND METHODS: Seventy-five patients with generalised aggressive periodontitis and 63 periodontally healthy subjects were enrolled for the purpose of the study. All participants received a full-mouth periodontal examination in which probing depth and clinical attachment level were recorded. The haematological variables analysed included total leukocyte count, neutrophil count, lymphocyte count, monocyte count, neutrophil percentage, lymphocyte percentage, monocyte percentage and platelet count. RESULTS: The patient group showed a significantly higher total leukocyte count (7.62 ± 1.70 x 109 cells/l, p = 0.008), neutrophil count (5.06 ± 1.47x109 cells/l, p < 0.001) and neutrophil percentage (70.61 ± 8.73, p < 0.001), as well as a significantly lower lymphocyte count (1.82 ± 0.65 x 109 cells/l, p = 0.002) and lymphocyte percentage (26.55 ± 8.05, p < 0.001) compared to the control group. Logistic regression analyses showed significant associations between aggressive periodontitis and elevated total leukocyte (p = 0.012) and neutrophil counts (p = 0.001). CONCLUSION: The findings of the present study suggest that patients with generalised aggressive periodontitis might also demonstrate a systemic inflammatory response, as evidenced by increased leukocyte counts. This systemic inflammatory response observed in patients with generalised aggressive periodontitis may be associated with an increased risk for cardiovascular diseases.

Evaluation of plasma reactive oxygen metabolites levels in obese subjects with periodontal disease.

BACKGROUND: Obesity represents the systemic condition capable of influencing the onset and progression of periodontal disease. Obesity is associated with oxidative stress. Plasma level of reactive oxidative metabolites (ROMs) is measured as an indicator of oxidative stress in the body. The aim of this study is to assess and compare the plasma ROM levels in obese subjects with healthy and inflammatory periodontal status. MATERIALS AND METHODS: Sixty subjects selected were grouped as 15 obese or overweight subjects with generalized chronic periodontitis, 15 obese or overweight subjects with generalized chronic gingivitis, 15 obese or overweight subjects with healthy periodontium, and 15 nonobese and healthy periodontium. The clinical periodontal parameters such as plaque index, gingival index, probing pocket depth, and clinical attachment level were measured. Blood samples were obtained to measure the plasma levels of ROM. RESULT AND CONCLUSION: In this study, obese subjects with chronic periodontitis (Group I) had mean plasma ROM levels (442.3 ± 15.65 Carratelli unit [CARR U]) showing 100% subjects with high oxidative stress. Obese subjects with chronic gingivitis (Group II) had mean plasma ROM levels (358.7 ± 20.61 CARR U) indicating 86.7% subjects with oxidative stress. Obese subjects with healthy periodontium (Group III) had 46.7% subjects with slight oxidative stress, and the mean ROM level was 320.2 ± 17.57. Nonobese subjects with healthy periodontium (Group IV) had 80% of subjects with normal oxidative stress and the mean plasma ROM level was 296.9 ± 20.35 CARR U. The intra- and inter-group comparison showed significant difference (P < 0.001). From our study, we report that obese subjects with periodontitis have more oxidative stress compared to obese subjects with healthy periodontium.

Associations Between Sex Hormone Levels and Periodontitis in Men: Results From NHANES III.

BACKGROUND: Sex hormones are linked to inflammation and bone turnover. The goal of this study is to explore the association between sex hormone levels and periodontitis in men using data from the third National Health and Nutrition Examination Survey (NHANES III). METHODS: Data from 755 men (aged ≥ 30 years), including serum levels of testosterone, estradiol, sex hormone binding globulin, and androstenediol glucuronide, were analyzed. Calculated bioavailable testosterone (CBT) and estradiol-to-testosterone ratio were calculated. Periodontitis was defined using the latest classification of extent and severity of periodontitis for NHANES data (≥ 2 interproximal sites with ≥ 3 mm attachment loss, ≥ 2 interproximal sites with probing depth [PD] ≥ 4 mm not on the same tooth, or one site with PD ≥ 5 mm). Sex hormones were evaluated as categorized and continuous variables. Correlations between the presence and severity of periodontitis and levels of sex hormones were determined and expressed as odds ratios (ORs). RESULTS: When adjusted for confounding factors, high total testosterone (TT) and CBT levels correlated with both the prevalence (OR [95% confidence interval (CI)], 2.1 [1 to 4.5] and 3.9 [1 to 14.8], respectively) and severity (OR [95% CI], 2.1 [1 to 4.3] and 3.4 [1.2 to 9.8]) of periodontitis. When continuous variables were used, the ORs (95% CIs) for presence and severity of periodontitis were 1.4 (0.6 to 3.3) and 1.5 (0.6 to 3.6) for TT and 1.3 (0.9 to 1.9) and 1.3 (0.9 to 1.8) for CBT, respectively. CONCLUSIONS: These findings are consistent with the existence of an association of periodontitis with sex hormone levels, especially testosterone, in men.

Local and serum levels of adipokines in patients with obesity after periodontal therapy: one-year follow-up.

AIM: This study evaluated the effects of scaling and root planing (SRP) on gingival crevicular fluid (GCF) and serum levels of adipokines in patients with chronic periodontitis (CP) with or without obesity. METHODS: Twenty patients with obesity and 20 patients without obesity, all with CP, received SRP. Serum and GCF levels of resistin, adiponectin, leptin, tumour necrosis factor [TNF]-α and interleukin [IL]-6 were evaluated by enzyme-linked immunosorbent assay at baseline, 3, 6 and 12 months post-therapy. RESULTS: SRP reduced the amounts of TNF-α in deep sites and increased the concentration of adiponectin in shallow sites of non-obese patients (p < 0.05). SRP increased the concentrations of TNF-α and leptin in patients with obesity (p < 0.05). GCF levels of TNF-α were higher in patients with obesity than in patients without obesity at all time-points (p < 0.05). There were no changes in serum levels of any adipokines for any group after therapy (p > 0.05). Patients with obesity exhibited higher serum levels of leptin at all time-points and IL-6 at 3 months post-therapy (p < 0.05). CONCLUSIONS: Obesity may modulate systemic and periodontal levels of adipokines in favour of pro-inflammation, independently of periodontal therapy. SRP did not affect the circulating levels of adipokines in patients with or without obesity.

The effects of periodontal therapy on serum and salivary leptin levels in chronic periodontitis patients with normal body mass index.

SUMMARY: Leptin concentrations are altered in favour of pro health after periodontal therapy. BACKGROUND: Leptin, a non-glycosylated peptide hormone, not only maintains fat stores, but is also an integral part of host defense repertoire. Leptin levels have been found to be altered in an array of inflammatory diseases including chronic periodontitis (CP), but the role of non-surgical periodontal therapy (NSPT) in altering the leptin concentrations in saliva and serum of CP patients is yet to be ascertained. The aim of the present study is to quantify leptin levels in CP patients having normal body mass index (BMI) pre-therapy as compared to periodontally healthy controls and to address whether successful NSPT alters leptin concentration in serum and saliva. MATERIALS AND METHODS: Twenty-two saliva (modified draining method) and serum samples (by venipuncture) were collected from CP patients with normal BMI (n = 22), before and at 4 and 12 weeks after completion of NSPT, and periodontally healthy, age- and gender-matched controls (n = 22). Leptin levels were estimated using enzyme linked immunosorbent assay kits. RESULTS: At baseline, CP patients had significantly different periodontal clinical parameters and the leptin concentrations in saliva of CP patients were found to be significantly lower than periodontally healthy volunteers (4710.10 ± 1133.21 vs 8721.10 ± 1019.58 pg/ml) (p < 0.05), whereas in serum the leptin concentrations were significantly higher than healthy controls (10749 ± 2062.24 vs 8085.00 ± 2859.68 pg/ml). Significant improvement in periodontal parameters, serum and salivary leptin levels were observed in CP patients at 4 and 12 weeks post-therapy (p < 0.01). CONCLUSION: Altered concentrations of leptin in serum and saliva are observed in CP patients which can be restored in favor of health after periodontal therapy.

Pathological periodontal pockets are associated with raised diastolic blood pressure in obese adolescents.

BACKGROUND: Obesity, a well-known risk factor for developing cardiovascular disease (CVD), is associated with chronic periodontitis in adults. This cross-sectional pilot study on obese adolescents was designed to investigate whether periodontal disease in terms of pathological periodontal pockets is associated with raised blood pressure and other risk markers for CVD. METHODS: The study included 75 obese subjects between 12 to 18 years of age, mean 14.5. Subjects answered a questionnaire regarding health, oral hygiene habits and sociodemographic factors. A clinical examination included Visible Plaque Index (VPI %), Gingival inflammation (BOP %) and the occurrence of pathological pockets exceeding 4 mm (PD ≥ 4 mm). Blood serum were collected and analyzed. The systolic and diastolic blood pressures were registered. RESULTS: Adolescents with pathological periodontal pockets (PD ≥ 4 mm; n = 14) had significantly higher BOP >25% (P = 0.002), higher diastolic blood pressure (P = 0.008), higher levels of Interleukin (IL)-6 (P < 0.001), Leptin (P = 0.018), Macrophage Chemoattractant Protein-1 (MCP-1) (P = 0.049) and thyroid stimulating hormone (TSH) (P = 0.004) in blood serum compared with subjects without pathological periodontal pockets (PD ≥ 4 mm; n = 61). The bivariate linear regression analysis demonstrated that PD ≥ 4 mm (P = 0.008) and systolic blood pressure (P < 0.001) were significantly associated with the dependent variable "diastolic blood pressure". The association between PD ≥ 4 mm and diastolic blood pressure remained significant (P = 0.006) even after adjusting for potential confounders BMI-sds, age, gender, mother's country of birth, BOP >25%, IL-6, IL-8, Leptin, MCP-1, TSH and total cholesterol in the multiple regression analysis. CONCLUSION: In conclusion, this study indicates an association between pathological periodontal pockets and diastolic blood pressure in obese adolescents. The association was unaffected by other risk markers for cardiovascular events or periodontal disease. The results call for collaboration between pediatric dentists and medical physicians in preventing obesity development and its associated disorders.

Effect of non-surgical periodontal treatment on visfatin concentrations in serum and gingival crevicular fluid of patients with chronic periodontitis and type 2 diabetes mellitus.

BACKGROUND: This study aims to assess visfatin concentrations in serum and gingival crevicular fluid (GCF) and investigate this relationship in patients with type 2 diabetes mellitus (T2DM) and chronic periodontitis (CP) before and after non-surgical periodontal treatment. METHODS: Fifty-four patients with T2DM and CP were recruited. The patients were randomly divided into two groups: treatment and control. Serum and GCF visfatin concentrations and glycated hemoglobin (HbA1c) levels were measured by enzyme-linked immunosorbent assay at different time points (at baseline and 3 and 6 months after non-surgical periodontal treatment). RESULTS: Serum and GCF visfatin concentrations showed no significant differences between the groups at baseline (t test, P >0.05). A significant decline of visfatin in the treatment group was found in serum and GCF 3 months after non-surgical periodontal treatment (t test, P <0.01). Baseline and 3-month HbA1c levels were not significantly different, but at 6 months, a statistically significant difference was detected (t test, P >0.05). CONCLUSIONS: The data suggest that non-surgical periodontal treatment is helpful for glucose control, an effect that may be associated with reduced visfatin in patients with T2DM and periodontitis. Furthermore, the data suggest that visfatin may be considered an inflammatory marker for periodontal diseases.

Associations between serum 25-hydroxyvitamin d and periodontal pocketing and gingival bleeding: results of a study in a non-smoking population in Finland.

BACKGROUND: Apart from the effects of vitamin D on bone metabolism, it is also known for its immunomodulatory properties. However, so far, it is not clear whether serum 25-hydroxyvitamin D [25(OH)D] exerts any beneficial effect on the periodontium. The aim of the present study is to investigate whether the serum level of 25(OH)D is related to periodontal condition, measured by means of pocketing and gingival bleeding. METHODS: This cross-sectional study is based on a non-smoking subpopulation without diabetes of the Finnish Health 2000 Survey (N = 1,262). Periodontal condition was measured as the number of teeth with deep (≥4 mm) periodontal pockets and the number of bleeding sextants per individual. Serum 25(OH)D level was determined by means of a standard laboratory measurement. Prevalence rate ratios and 95% confidence intervals were estimated using Poisson regression models. RESULTS: There were practically no associations between serum 25(OH)D level and teeth with deep (≥4 mm) periodontal pockets or bleeding sextants. A somewhat lower proportion of teeth with deep periodontal pockets was found in higher serum 25(OH)D quintiles among individuals with a good oral hygiene level. CONCLUSION: Serum 25(OH)D did not seem to be related to periodontal condition, measured as periodontal pocketing and gingival bleeding in this low-risk, low-25(OH)D status population.

ß2-Glycoprotein I-Dependent Anti-Cardiolipin Antibodies Associated With Periodontitis in Patients With Systemic Lupus Erythematosus.

BACKGROUND: It was reported that patients with systemic lupus erythematosus (SLE) exhibited increased levels of anticardiolipin (anti-CL) antibodies, a class of antiphospholipid antibodies associated with thrombosis. ß2-glycoprotein I (ß2GPI) has been considered as the actual target antigen for anti-CL antibodies. This study investigates the association of periodontal infection with anti-CL antibodies in patients with SLE. METHODS: Fifty-three SLE female patients and 56 healthy female volunteers were recruited in this case-control study. All participants received periodontal examinations. The presence of Porphyromonas gingivalis and Treponema denticola in saliva and plaque samples was detected by polymerase chain reaction. Levels of serum anti-CL and anti-ß2GPI antibodies were examined using enzyme-linked immunosorbent assay. RESULTS: Patients with SLE exhibited more periodontal attachment loss and increased titers of serum anti-CL and anti-ß2GPI antibodies compared with healthy controls. Patients with active SLE who harbored P. gingivalis or P. gingivalis together with T. denticola intraorally exhibited significantly higher anti-CL and anti-ß2GPI antibodies than those without these bacteria. Anti-CL and anti-ß2GPI antibody levels correlated positively with clinical attachment level. Furthermore, increased anti-ß2GPI antibody levels were significantly associated with C-reactive protein and erythrocyte sedimentation rate. CONCLUSIONS: Elevated anti-CL and anti-ß2GPI antibody levels were associated with periodontopathic bacteria and periodontal breakdown in patients with SLE. Periodontitis might be a modifiable risk factor for SLE.

Effect of non-surgical periodontal therapy on plasma homocysteine levels in Indian population with chronic periodontitis: a pilot study.

AIM: Homocysteine (Hcy) is implicated in the development of cardiovascular diseases (CVD). The effect of periodontal disease and periodontal therapy on plasma Hcy remains controversial. Hence, in this pilot study we assessed the effect of periodontal disease and non-surgical periodontal therapy (NSPT) on plasma Hcy in systemically healthy Indian subjects. MATERIALS AND METHODS: Forty participants (30 to 39 years) were enrolled in the study and were divided into two groups based on gingival index, probing depth, and clinical attachment level (CAL): Healthy (control group; n = 20) and Chronic Periodontitis (test group; n = 20). Plasma samples were collected and quantified at baseline and 12 weeks after scaling and root planing (SRP) for Hcy using High Performance Liquid Chromatography with fluorescent detection (HPLC-fld). RESULTS: Plasma Hcy levels of chronic periodontitis (17.87 ± 1.21 µmol/l) subjects was significantly higher than healthy subjects (9.09 ± 2.11 µmol/l). Post-therapy, the plasma Hcy concentration reduced significantly (11.34 ± 1.87 µmol/l) (p < 0.05). CONCLUSION: The rise and descent of plasma Hcy levels with periodontal inflammation and therapy, respectively, indicate a direct relationship of Hcy with chronic periodontitis. NSPT may be employed as an adjunctive Hcy Lowering Therapy, contributing towards primary prevention against CVD's.

Evaluation of lipid peroxidation and oxidative DNA damage in patients with periodontitis and hyperlipidemia.

BACKGROUND: The purpose of this study is to determine the serum levels of malondialdehyde (MDA), as a lipid peroxidation marker, and 8-hydroxydeoxyguanosine (8-OHdG), as an oxidative DNA damage marker, in patients with chronic periodontitis (CP) and hyperlipidemia. METHODS: A total of 74 individuals were divided into four age- and sex-matched groups: 18 patients with hyperlipidemia and CP (HLp), 18 periodontally healthy patients with hyperlipidemia (HLh), 19 systemically healthy individuals with CP (Cp), and 19 systemically and periodontally healthy controls (Ch). Clinical periodontal parameters were measured, and serum lipids, MDA, and 8-OHdG levels were assessed in blood samples. RESULTS: 8-OHdG, MDA, probing depth, clinical attachment level, and percentage of sites bleeding on probing (BOP) were significantly higher in the HLp group than the Cp group. In the hyperlipidemic group, BOP was significantly correlated with total cholesterol, the ratio of total cholesterol to high-density lipoprotein cholesterol, and 8-OHdG levels. A significant correlation between 8-OHdG and MDA was also observed in the hyperlipidemia group. CONCLUSIONS: In this study, serum MDA and 8-OHdG were found to be highest in the HLp group. The increased levels of MDA and 8-OHdG in HLp patients may be a result of a harmful oxidative status in association with hyperlipidemia and periodontitis.

Pocket depth and bleeding on probing and their associations with dental, lifestyle, socioeconomic and blood variables: a cross-sectional, multicenter feasibility study of the German National Cohort.

BACKGROUND: To investigate the periodontal disease status in a multi-center cross-sectional study in Germany. Associations of dental, socio-economic, blood and biomedical variables with periodontal outcome parameters were evaluated. METHODS: From 4 different centers N = 311 persons were included, drawn randomly from the registration offices. Maximal pocket depth (PD) was used as primary indicator for periodontitis. It was classified as: no/mild ≤3 mm, moderate 4-5 mm, severe ≥6 mm. Associations between socioeconomic (household income, education), lifestyle, and biomedical factors and PD or bleeding on probing (BOP) per site ("Yes"/"No") was analyzed with logistic regression analysis. RESULTS: Mean age of subjects was 46.4 (range 20-77) years. A significantly higher risk of deeper pockets for smokers (OR = 2.4, current vs. never smoker) or persons with higher BMI (OR = 1.6, BMI increase by 5) was found. Severity of periodontitis was significantly associated with caries lesions (p = 0.01), bridges (p < .0001), crowns (p < .0001), leukocytes (p = 0.04), HbA1c (p < .0001) and MCV (p = 0.04). PD was positively correlated with BOP. No significant associations with BOP were found in regression analysis. CONCLUSIONS: Earlier findings for BMI and smoking with severity of PD were confirmed. Dental variables might be influenced by potential confounding factors e.g. dental hygiene. For blood parameters interactions with unknown systemic diseases may exist.

Low serum level of 1,25(OH)2 D is associated with chronic periodontitis.

BACKGROUND AND OBJECTIVES: Vitamin D has been studied primarily for its involvement in calcium and phosphate absorption and bone metabolism. The active form of vitamin D-1,25(OH)2 D-has also been investigated for its immune modulatory properties. We explored associations between serum levels of 25(OH)D and 1,25(OH)2 D and periodontal health. SUBJECTS AND METHODS: This case-control study included 55 subjects with chronic periodontitis (cases) and 30 periodontally healthy subjects (controls). Their serum levels of 25(OH)D, 1,25(OH)2 D, ultrasensitive C-reactive protein and high-density lipoprotein cholesterol were determined. Associations between vitamin D and periodontal health status were studied using logistic regression analysis. RESULTS: A statistically significant association was found between serum 1,25(OH)2 D level and periodontal health status; in that subjects with a low 1,25(OH)2 D were more likely to belong to the periodontitis group (OR = 0.97, 95% CI = 0.95-1.00). There was practically no association between 25(OH)D level and periodontal health status. CONCLUSION: In this case-control study low serum 1,25(OH)2 D level appeared to be associated with periodontitis, which was in line with the previously reported associations between serum 1,25(OH)2 D levels and other inflammatory diseases. Whether this association is causal in nature, remains to be confirmed in future studies.

Correlation of Toll-like receptor 4, interleukin-18, transaminases, and uric acid in patients with chronic periodontitis and healthy adults.

BACKGROUND: Because of the potential association between periodontal disease and inflammation, the purpose of the present study is to examine the level of Toll-like receptor 4 (TLR-4), interleukin-18 (IL-18), and uric acid as markers of the inflammatory host response in the plasma and saliva of healthy individuals and patients with periodontitis. In addition, routine biochemical parameters such as fasting glucose, insulin, total cholesterol, high-density lipoprotein (HDL) cholesterol, low-density lipoprotein (LDL) cholesterol, triglycerides, alanine transaminase (ALT), and aspartate transaminase (AST) were measured. The authors also wanted to check whether patients with chronic periodontitis (CP) exhibit different modulations in salivary and/or plasma concentrations of these parameters compared with clinically healthy individuals. METHODS: Saliva and plasma samples were collected from 40 patients with CP and 20 healthy individuals. TLR-4 and IL-18 measurements were done using commercially available enzyme-linked immunosorbent assay kits. Total, HDL, and LDL cholesterol; triglycerides; fasting glucose; AST; and ALT levels were analyzed on a biochemistry analysis system using specific kits. Non-parametric tests were used for certain parameters in the statistical analyses because the data did not follow Gaussian distribution. RESULTS: Significant differences were observed in plasma and salivary TLR-4 and IL-18 levels, along with clinical measurements such as plaque index and probing depth, in patients with CP (P < 0.001). The plasma level of TLR-4 was found to be increased from 0.99 to 3.28 ng/mL in patients with CP. Salivary TLR-4 levels also showed a slightly higher increase in the diseased state (12.44 to 29.97 ng/mL). A significant increase of ≈ 46% was recorded in the plasma IL-18 level. However, salivary IL-18 levels rose up to > 5-fold in the patients with CP compared with healthy individuals. The level of plasma uric acid was found to be highly significantly increased compared with control individuals. HDL cholesterol and triglyceride also showed significant differences (P < 0.02 and P < 0.03, respectively). Plasma glucose, total cholesterol, LDL cholesterol, and insulin levels did not show any significant difference. There was only a slight increase in plasma AST and ALT levels between diseased and healthy states (22.55 versus 25.50 IU/L and 12.35 versus 15.95 IU/L, respectively). However, salivary AST and ALT levels showed a ≈ 6-fold rise in the patients with CP compared with the healthy individuals. Cross-correlation analysis in the periodontitis disease group showed a significant association of plasma AST, salivary AST, and salivary ALT with uric acid level. CONCLUSIONS: Based on this study, the authors believe that TLR-4, IL-18, and uric acid could have a role in the inflammatory pathology of periodontitis. These parameters are suggested to be useful in the prognosis and diagnosis of CP. However, the mechanistic association of these parameters with inflammatory pathology of patients with periodontitis needs to be further elucidated in a higher number of samples.

Comparative evaluation of serum superoxide dismutase and glutathione levels in periodontally diseased patients: an interventional study.

BACKGROUND: Periodontal disease is an immune-inflammatory disease characterized by connective tissue breakdown, loss of attachment, and alveolar bone resorption. Under normal physiological conditions, a dynamic equilibrium is maintained between the reactive oxygen species (ROS) and antioxidant defense capacity. Oxidative stress occurs when this equilibrium shifts in favor of ROS. Oxidative stress is thought to play a causative role in the pathogenesis of periodontal diseases. AIM: The present study was designed to estimate and compare the superoxide dismutase (SOD) and glutathione (GSH) levels in the serum of periodontitis, gingivitis, and healthy individuals before and after nonsurgical periodontal therapy. MATERIALS AND METHODS: The present study was conducted in the Department of Periodontics, A. B. Shetty Memorial Institute of Dental Sciences, Deralakatte, Mangalore. The study was designed as a single blinded interventional study comprising 75 subjects, inclusive of both sexes and divided into three groups of 25 patients each. Patients were categorized into chronic periodontitis, gingivitis, and healthy. The severity of inflammation was assessed using gingival index and pocket probing depth. Biochemical analysis was done to estimate the SOD and GSH levels before and after nonsurgical periodontal therapy. RESULTS obtained were then statistically analyzed using ANOVA test and paired t-test. RESULTS: The results showed a higher level of serum SOD and GSH in the healthy group compared to the other groups. The difference was found to be statistically significant (P < 0.0001). The post-treatment levels of SOD were statistically higher than the pre-treatment levels in periodontitis and gingivitis group.

Circulating endothelial progenitor cells in periodontitis.

BACKGROUND: Several biologically plausible mechanisms have been proposed to mediate the association between periodontitis and atherosclerotic vascular disease (AVD), including adverse effects on vascular endothelial function. Circulating endothelial progenitor cells (cEPCs) are known to contribute to vascular repair, but limited data are available regarding the relationship between cEPC levels and periodontitis. The aims of this cross-sectional study are to investigate the levels of hemangioblastic and monocytic cEPCs in patients with periodontitis and periodontally healthy controls and to associate cEPC levels with the extent and severity of periodontitis. METHODS: A total of 112 individuals (56 patients with periodontitis and 56 periodontally healthy controls, aged 26 to 65 years; mean age: 43 years) were enrolled. All participants underwent a full-mouth periodontal examination and provided a blood sample. Hemangioblastic cEPCs were assessed using flow cytometry, and monocytic cEPCs were identified using immunohistochemistry in cultured peripheral blood mononuclear cells. cEPC levels were analyzed in the entire sample, as well as in a subset of 50 pairs of patients with periodontitis/periodontally healthy controls, matched with respect to age, sex, and menstrual cycle. RESULTS: Levels of hemangioblastic cEPCs were approximately 2.3-fold higher in patients with periodontitis than periodontally healthy controls, after adjustments for age, sex, physical activity, systolic blood pressure, and body mass index (P = 0.001). A non-significant trend for higher levels of monocytic cEPCs in periodontitis was also observed. The levels of hemangioblastic cEPCs were positively associated with the extent of bleeding on probing, probing depth, and clinical attachment loss. Hemangioblastic and monocytic cEPC levels were not correlated (Spearman correlation coefficient 0.03, P = 0.77), suggesting that they represent independent populations of progenitor cells. CONCLUSION: These findings further support the notion that oral infections have extraoral effects and document that periodontitis is associated with a mobilization of EPCs from the bone marrow, apparently in response to systemic inflammation and endothelial injury.

Periodontal status and serum biomarkers levels in haemodialysis patients.

AIM: To investigate the association between periodontal status and serum biomarkers levels in haemodialysis patients. METHODS: This cross-sectional study included 96 haemodialysis patients. The periodontal evaluation was realized using clinical attachment level (CAL), probing depth (PD), gingival bleeding index (GBI), visible plaque index (VPI) and gingival index (GI). Biochemical and haematological data - serum albumin, phosphorus, creatinine, transferrin, ferritin, iron, alkaline phosphatase, calcium, potassium and haemoglobin - were collected from the medical records. The subject was diagnosed with periodontitis if he/she had at least two inter-proximal sites in different teeth with CAL ≥4 mm and/or at least two inter-proximal sites in separate teeth with PD ≥5 mm. RESULTS: The study population consisted of 45 men and 51 women, with mean time under haemodialysis of 45.6 ± 33.1 months. Periodontitis was observed in 59.4% of the subjects. The periodontitis group had albumin (p = 0.021) and phosphorus (p = 0.024) serum levels lower than the no periodontitis group. Thus, there was a positive association of periodontitis with hypoalbuminaemia (OR = 9.10, p = 0.006) and a negative association with hyperphosphataemia (OR = 0.21, p = 0.010). CONCLUSIONS: These findings suggest that periodontitis is associated with albumin and phosphorus serum levels in haemodialysis patients.