Aspects Of Periodontitis Research Articles

Histopathological and macroscopical considerations of induced experimental periodontitis in rats

Ten Wistar males rats were used to induce experimental periodontitis by placing a 5-0 cotton thread ligature at the base of the first superior molar on the left side. Before this phase, the molar went through the process of scaling, rooting and planning. Soft movements of the molar were realized for creating an accumulation of plaque by flattening and by resulting the displacement of the gingival tissue, thus provoking an inflammatory response. After 7 days the ligatures were removed in all ten rats. After 14 days, results obtained showed gross aspects of periodontitis and microscopical lesions as well, installed in the periodontium. Microscopically, an inflammatory response with bone necrosis and alveolar bone loss was observed. The aim of this study is to test an experimental protocol of periodontitis confirming the presence of this pathology by gross aspects and also histopathological aspects. In conclusion, the tested procedure is able to provide all the key biological elements present in periodontal disease, whereas representing the adequate features for biomaterial testing domain.

Molecular aspects of periodontitis in obese patients – review of literature

Molecular aspects of periodontitis in obese patients – review of literature

Salivary biomarkers of existing periodontal disease: A cross-sectional study

The authors conducted a study to determine if salivary biomarkers specific for three aspects of periodontitis--inflammation, collagen degradation and bone turnover--correlate with clinica features of periodontal disease. The relationship between periodontal disease and the levels of interleukin-1 beta (IL-1beta), matrix metalloproteinase (MMP)-8, and osteoprotegerin (OPG) in whole saliva of 57 adults (28 "case" subjects with moderate-to-severe periodontal disease and 29 healthy control subjects) was examined in a case-control trial. Mean levels of IL-1beta and MMP-8 in saliva were significantly higher in case subjects than in controls. Both analytes correlated with periodontal indexes, whereas, after adjustment for confounders, OPG did not. Elevated salivary levels of MMP-8 or IL-1beta (more than two standard deviations above the mean of the controls) significantly increased the risk of periodontal disease (odds ratios in the 11.3-15.4 range). Combined elevated salivary levels of MMP-8 and IL-1beta increased the risk of experiencing periodontal disease 45-fold, and elevations in all three biomarkers correlated with individual clinical parameters indicative of periodontal disease. Salivary levels of MMP-8 and IL-1beta appear to serve as biomarkers of periodontitis. Qualitative changes in the composition of salivary biomarkers could have significance in the diagnosis and treatment of periodontal disease.