Effectiveness of nanocrystalline cerium dioxide for secondary prevention of inflammatory periodontal diseases in young individuals with obesity

Abstract

Obesity is a non-infectious pandemic, largely associated with oral diseases development. Oxidative stress is one of the crucial mechanisms in the development of inflammatory periodontal diseases in obesity. Nanomedicine is a highly promising to alleviate pbesity and associated conditions. The aim was to study the influence of cerium dioxide nanoparticles on periodontal tissues of patients with diverse values of BMI and assess changes of periodontal tissues. We included 125 young Ukrainian individuals of both sexes (18-22 years old), divided into four groups according to Body mass index (BMI). Initial oral status was detected with index assessment that include the determination of caries intensity by DMFT index, oral hygiene determination (Green-Vermillion index), periodontal tissues (Rateitchak index), PMA (Parma), CPI (Leus), PBI (Saxer and Muhlemann). The periodontograma was completed for all patients. After the initial checkup all examined patients with generalized catarrhal gingivitis were randomly divided into two groups: treated with «Cerera» (the active substance is nanoparticles of cerium dioxide 2-7 nm in concentration of 140 mcg/ml that were stabilized with sodium citrate) per os for 10 drops every day in the morning diluted in 50 ml of water for 10 days and controls. Patients with 1st and 2nd degree obesity have a significantly higher grade of periodontal alteration compared with normal BMI and overweight (values of CPI 1.7±0.9 and 1.66±0.12 vs 1.33±0.11 and 1.42±0.11 respectively). The intensity and the prevalence of gingiva inflammation assessed by PMA and PBI index were significantly higher in obese individuals. In all overweight patients the level of catalase activity was significantly lower than in patients with normal values of BMI. The administration of «Cerera» significantly increased the activity of catalase regardless of BMI, significantly changed the values of gingival inflammation indexes; the severity of inflammatory process became less intensive vs baseline (determined by PBI values before 17.6%±2.1 and 7.8%±2.1 after treatment; in the 4th group the values of PBI had declined significantly by 1.6 times). After the 10 days administration of «Cerera» the content of GAG and fucose in oral liquid of all obese individuals significantly decreased; lipid oxidation parameters decreased in excessive obesity: TBA-active products levels in patients with BMI 35.00-39.99 kg/сm2 dropped down from 53.9±2.11 μmol/L to 47.43±2.29 μmol/L. Cerium dioxide nanoparticles demonstrate high effectiveness against inflammatory changes in periodontal tissues in obese patients. The mechanisms of action of cerium dioxide nanoparticles in the periodontal structures are needed to be precisely determined in further studies.