EFFICACY OF PHOTODYNAMIC THERAPY AS AN ADJUNCT TO NON – SURGICAL PERIODONTAL THERAPY IN TYPE-2 DIABETES MELLITUS PATIENT

Background: To Evaluate the additional benefit of Antimicrobial Photodynamic therapy, if any in the glycemic control of type 2 diabetes mellitus chronic periodontitis patients . Methods: Fifty diabetic patients with chronic periodontitis were taken for the study who met the inclusion criteria of clinical attachment loss ?3 to 5 mm at ? 30% of sites and bleeding on probing present in two different quadrants . After SRP ( Scaling and root planing ) , one quadrant was selected for aPDT while other served as a control group. Clinical parameters i.e. Plaque index, Probing depth ,Relative attachment level and HBA1c were measured at baseline, 1 week , 1month and 3 months. Results: Statistically significant differences in the mean probing depth, Relative attachment level, plaque deposit, and HBA1c were found between baseline and 12 weeks post-treatment for both groups. No significant differences in glucose levels were detected among the two groups in 1 week . Reduction in the mean HbA1c level after treatment was observed in both groups in 1 month and 3 months . Conclusion: Antimicrobial Photodynamic Therapy when used in addition to scaling and root planing yields significant improvement of mean probing depth , Plaque deposit ,Relative attachment levels, periodontal status and reduction of HbA1c levels in treatment of diabetic patients with periodontitis when comparing the test group to the control group. Keywords: photodynamic therapy , scaling and root planing, glycated haemoglobin ,Randomized controlled trial

Microbiota in Gingival Crevicular Fluid Before and After Mechanical Debridement With Antimicrobial Photodynamic Therapy in Peri-Implantitis

ObjectivesThis study aims to compare the microbiota of gingival crevicular fluid (GCF) before and after mechanical debridement (MD) with antimicrobial photodynamic therapy (aPDT) and determine the core efficient microbiota in peri-implantitis after treatment.MethodsWe recruited 9 patients (14 implants) treated with MD+aPDT for peri-implantitis at our center from February 1, 2018, to February 1, 2019. GCF was collected using filter paper strip before and after the treatment. The bacterial 16S rRNA was amplified and sequenced using an Illumina MiSeq platform to characterize the GCF. Bioinformatics and statistical analyses were performed using QIIME2 and R.ResultsA total of 4,110,861 high-quality sequences were obtained from GCF samples. Based on the reference database, 1,120 amplicon sequence variants (ASVs) were finally harvested. Principal coordinates analysis indicated significant differences in the bacterial community structure between the 180 days after-treatment group and pre-treatment group. Difference analysis and least discriminant analysis showed that the differences were mainly reflected in non-dominant bacteria between these two groups. The non-dominant genera with significantly different distribution between the 180 days after-treatment group and the pre-treatment group included Lactobacillus, Pedobacter, Bulleidia, Centipeda, Desulfovibrio, Ochrobactrum, Staphylococcus, Microbacterium, Brevundimonas, Desulfobulbus, and Parvimonas. Moreover, a total of 29 predictive functional categories at KEGG level 2 were identified. The significant difference pathways at KEGG level 2 between after-treatment and pre-treatment were concentrated in infectious disease-related pathways.ConclusionsPatients with peri-implantitis have significant changes in the low-abundance bacteria of the GCF before and after MD+aPDT. MD+aPDT may change the composition of GCF microbiota by increasing the abundance of cluster 1 (beneficial) and decreasing that of cluster 4 (harmful), which may decrease metabolic response to infection and thus improve peri-implantitis.

Gold Nanoclusters Based Nanocomposites for Combinatorial Antibacterial Therapy on Biofilm Forming Pathogens

Nanomaterial-based antimicrobial photodynamic therapy (aPDT) is a promising approach for the eradication of drug-resistant bacterial biofilm. However, the intrinsic cytotoxicity of the commonly used nanomaterials together with their limited capacity...