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Background: Periodontitis worsens the hyperglycaemia in patients with type 2 diabetes mellitus (T2DM). Subgingival instrumentation, with or without surgical access, is the gold‐standard treatment for periodontitis. The aim was to summarize the evidence on the effect of subgingival instrumentation (with or without open flap) on the reduction of glycosylated haemoglobin (HbA1c). Methods: Nine electronic databases were searched up to 15 February 2023. Twelve randomized controlled trials with at least 6 months of follow‐up were included. Studies using systemic or local‐delivery antimicrobial therapies were excluded. Meta‐analyses were performed using the random‐effects model. The sources of heterogeneity were assessed by applying linear meta‐regression. Risk of bias was assessed by RoB 2, and certainty of evidence by GRADE. Results: Eleven studies were included in the quantitative analyses (1374 patients). Subgingival instrumentation resulted in 0.29% lower HbA1c (95% confidence interval: 0.10–0.47; p =.03) compared with non‐active treatment. Discussion: None of the 12 studies were assessed as having low risk of bias. The percentage of females and the time of diabetes diagnosis significantly explained the high level of heterogeneity. Subgingival periodontal therapy results in a significant and clinically relevant improvement in glycaemic control over 6 months in patients with T2DM and periodontitis. The grade of evidence was moderate. [ABSTRACT FROM AUTHOR]

Aim: To examine the association between a pro‐inflammatory diet, estimated using the energy‐adjusted dietary inflammatory index (E‐DII), and the risk of periodontitis. Materials and Methods: Study subjects from the Korean Genome and Epidemiology Study Health Examinee (KoGES_HEXA) cohort were included for cross‐sectional analysis (n = 168,378) using multivariate logistic regression and prospective analysis (n = 160,397) using Cox proportional hazard models respectively. DII and E‐DII scores were calculated based on the intake reported on a validated semi‐quantitative food frequency questionnaire (SQ‐FFQ). Results: Cox proportional hazard models revealed a significantly increased risk of incident periodontitis in individuals consuming high E‐DII (more pro‐inflammatory) diets in the total population (HRquartile4vs1 = 1.29; 95% CI: 1.13–1.48; ptrend <.001) and in both men (HRquartile4vs1 = 1.36; 95% CI: 1.07–1.73; ptrend = 0.02) and women (HRquartile4vs1 = 1.27; 95% CI: 1.08–1.50; ptrend =.002). The association remained significant even after excluding cases diagnosed early in the follow‐up. In the cross‐sectional analysis, a significant association was observed between the E‐DII score and the prevalence of periodontitis among all study subjects (ORquartile4vs1 = 1.17; 95% CI: 1.03–1.34; ptrend = 0.01) and men (ORquartile4vs1 = 1.28; 95%CI: 1.01–1.63; ptrend <.001); however, the association did not reach statistical significance in women (ORquartile4vs1 = 1.13; 95% CI: 0.96–1.33; ptrend <.001). Conclusions: Findings from the current study support the hypothesis that diets with high pro‐inflammatory potential increase the risk of periodontitis. [ABSTRACT FROM AUTHOR]

Aim: To answer the following PICO question: In systemically healthy humans with peri‐implant mucositis, what is the efficacy of patient‐performed or administered (by prescription) measures used adjunctively to submarginal instrumentation, as compared to submarginal instrumentation alone or combined with a negative control, in terms of reducing bleeding on probing (BOP), in randomized controlled clinical trials (RCTs) with at least 3 months of follow‐up? Materials and Methods: Three databases were searched until April 2022. Weighted mean differences (WMDs) with 95% confidence intervals (CIs) and predictive intervals were calculated. Results: Sixteen parallel RCTs corresponding to 14 studies with low/moderate risk of bias were included. Test groups showed greater reductions in BOP (%) than control groups (nstudies = 16; npatients = 650; WMD = 14.25%; 95% CI [9.06–19.45]; p <.001; I2 = 98.7%). The greatest WMD in BOP reductions (%) were obtained by antiseptics (ns = 5; np = 229; WMD = 22.72%; 95% CI [19.40–26.04]; p < 0.001; I2 = 94.8%), followed by probiotics (ns = 6; np = 260; WMD = 12.11%; 95% CI [3.20–21.03]; p =.008; I2 = 93.3%) and systemic antibiotics (ns = 3; np = 101; WMD = 5.97%; 95% CI [1.34–10.59]; p =.012; I2 = 58.1%). Disease resolution was scarcely reported (n = 6). Conclusions: Significant clinical improvements can be obtained when professional submarginal instrumentation is combined with patient‐performed or administered (by prescription) adjunctive measures, although a complete disease resolution may not be achieved. [ABSTRACT FROM AUTHOR]

Aim: To investigate the relationship between plant‐based diet indices (PDIs) and periodontitis and serum IgG antibodies against periodontopathogens in the U.S. population. Materials and Methods: We analysed cross‐sectional data on 5651 participants ≥40 years of age from the Third National Health and Nutrition Examination Survey. Food frequency questionnaire data were used to calculate the overall PDI, healthy plant‐based diet index (hPDI), and unhealthy plant‐based diet index (uPDI). Periodontitis was defined using a half‐reduced Centers for Disease Control and Prevention and American Academy of Periodontology case definition. Serum antibodies against 19 periodontopathogens were used to classify the population into two subgroups using hierarchical clustering. Survey‐weighted multivariable logistic regressions were applied to assess the associations of PDI/hPDI/uPDI z‐scores with periodontitis and hierarchical clusters after adjusting for potential confounders. Results: A total of 2841 (50.3%) participants were defined as having moderate/severe periodontitis. The overall PDI z‐score was not significantly associated with the clinical and bacterial markers of periodontitis. By considering the healthiness of plant foods, we observed an inverse association between hPDI z‐score and periodontitis (odds ratio [OR] = 0.925, 95% confidence interval [CI]: 0.860–0.995). In contrast, higher uPDI z‐score (adherence to unhealthful plant foods) might increase the risk of periodontitis (OR = 1.100; 95% CI: 1.043–1.161). Regarding antibodies against periodontopathogens, the participants in cluster 2 had higher periodontal antibodies than those in cluster 1. The hPDI z‐score was positively associated with cluster 2 (OR = 1.192; 95% CI: 1.112–1.278). In contrast, an inverse association between uPDI z‐score and cluster 2 was found (OR = 0.834; 95% CI: 0.775–0.896). Conclusions: Plant‐based diets were associated with periodontitis, depending on their quality. A healthy plant‐based diet was inversely related to an increased risk of periodontitis but positively related to elevated antibody levels against periodontopathogens. For an unhealthy plant‐based diet, the opposite trends were observed. [ABSTRACT FROM AUTHOR]

Aim: To investigate the association of the number of natural teeth with overall dietary diversity and nutritional status in a nationally representative study among older adults in China. Materials and Methods: A cross‐sectional analysis was conducted among community‐dwelling adults aged 65 years or older from the Chinese Longitudinal Healthy Longevity Study. According to the self‐reported number of natural teeth, participants were categorized into ≥20, 10–19, 1–9 natural teeth, and edentulous. Dietary diversity score (DDS) was constructed based on intake frequencies of 10 food groups assessed by a simplified food frequency questionnaire. The geriatric nutritional risk index was used to measure the malnutrition status (i.e., normal, mild malnutrition, and moderate‐to‐severe malnutrition) among a subgroup of participants. Linear and multinomial logistic regression models were used to examine the corresponding associations. Results: Among 54,796 study participants, the mean (SD) age was 87.86 (11.45) years, 82.7% had poor dentition (<20 natural teeth), and 27.3% wore dentures. After multivariable adjustment, participants with poor dentition had lower DDSs (βedentulous = −0.39, 95% confidence interval [CI], −0.48, −0.30; β1‐9 teeth = −0.46, 95% CI, −0.55, −0.37; β10‐19 teeth = −0.36, 95% CI, −0.46, −0.26) than those with 20 natural teeth or more. For individual food items, edentulous, 1–9 and 10–19 natural teeth were associated with lower odds of regular intake of fresh fruits, fresh vegetables, meat, fish and aquatic products, eggs, legumes, preserved vegetables, tea, and garlic, but higher odds of regular intake of sugar and sweets. Among participants with poor dentition, individuals without dentures had lower intake frequencies of most food groups than those wearing dentures. In addition, poor dentition was related to lower odds of normal nutritional status (odds ratio = 0.49, 95% CI, 0.27, 0.89). Conclusions: Older adults with poor dentition had significantly lower dietary diversity and worse nutritional status. Future studies are warranted to identify effective interventions to improve the dietary quality and nutrition status among partially and fully edentulous individuals, including those with Stage IV periodontitis. [ABSTRACT FROM AUTHOR]