Research Articles Archive - Page 15 of 18

Salivary antioxidants in patients with type 1 or 2 diabetes and inflammatory periodontal disease: a case-control study

The purpose of this study was to evaluate and compare salivary concentrations of reduced, oxidized glutathione, uric acid, ascorbic acid, and total antioxidant capacity in subjects with diabetes and systemically healthy subjects with inflammatory periodontal disease. This study concludes that the decrease in salivary reduced-glutathione levels in patients with type 1 diabetes may have a ... Read more

Increased salivary lipid peroxidation in human subjects with oral lichen planus.

Oral lichen planus (OLP) is a chronic inflammatory mucosal disease of unknown aetiology. Recently, increased oxidative stress has been implicated in the pathogenesis of various diseases. The aim of this study was to evaluate the total antioxidant capacity (TAC) and lipid peroxidation level, in the saliva of patients with OLP. We conclude that OLP patients ... Read more

Genotoxicity of urethane dimethacrylate, a tooth restoration component.

Urethane dimethacrylate (UDMA) is used in dental restorative materials in its polymeric form. However, the process of polymerization is usually incomplete and the monomers of UDMA can diffuse into the oral cavity and the pulp, reaching millimolar concentrations. In the present work we showed that UDMA at 0.1 and 1.0 mM decreased the viability of ... Read more

Salivary and gingival crevicular fluid melatonin in periodontal health and disease

Melatonin, with its antioxidant properties, plays a pertinent role in influencing the pathogenesis of periodontal disease. This study aims to detect the presence of melatonin in gingival crevicular fluid (GCF) and to assess the levels of salivary and GCF melatonin in periodontal disease and show the correlation between salivary and GCF melatonin.

Tea catechins reduce inflammatory reactions via mitogen-activated protein kinase pathways in toll-like receptor 2 ligand-stimulated dental pulp cells

In this study, we evaluated whether catechins could inhibit the expression of pro-inflammatory mediators induced by dental caries-related bacteria, Streptococci, or pathogen-associated molecular patterns (PAMPs) stimulation in human dental pulp fibroblasts (HDPF). We further determined the mechanisms of the anti-inflammatory activity of catechins.

Healthy properties of proanthocyanidins

Proanthocyanidins have a putative role as antioxidants, and are able to produce antiadhesive actions against bacteria in urinary and dental infections, including Escherichia coli and Streptococcus mutans. Hence, proanthocyanidins are considered as beneficial molecules in preventing or treating many diseases and pathological conditions. Therefore, finding out more about condensed tannins bioavailability, and understanding the regulatory ... Read more

Oxidative stress and antioxidant defense in oral lichen planus and oral lichenoid reaction

Oral Lichen Planus (OLP) is an inflammatory disease of unknown etiology while Oral Lichenoid Reaction (OLR) is a condition mimicking OLP. As these conditions are exposed to oxidative stress, they could release reactive oxygen species (ROS) which are implicated in the pathogenesis of a plethora of inflammatory conditions to lethal diseases. We evaluated and compared ... Read more

Lipid peroxidation levels, total oxidant status and superoxide dismutase in serum, saliva and gingival crevicular fluid in chronic periodontitis patients before and after periodontal therapy.

Recent data have demonstrated increased lipid peroxidation (LPO) levels and oxidative stress in periodontitis.

Nitrogen dioxide-dependent oxidation of uric acid in the human oral cavity under acidic conditions: implications for its occurrence in acidic dental plaque.

Important to keep oral cavity pH at higher levels to prevent periodontal diseases. The results of this study seem to contribute to the understanding of the induction of periodontal diseases in the context of nitrite-dependent production of nitrogen oxides in acidic dental plaque.

Protective effect of proanthocyanidins on endotoxin induced experimental periodontitis in rats.

The pathogenesis of periodontitis involves anaerobic oral bacteria as well as the host response to infection and several drugs have been developed which can curtail these deleterious effects. Proanthocyanidin, a novel flavanoid extracted from grape seeds, has been shown to provide a significant therapeutic effect on endotoxin (Escherichia coli) induced experimental periodontitis in rats.