ABSTRACT
Objectives: The current in vitro study aimed to assess the effects of ascorbic acid augmented albumin platelet-rich fibrin (AA Alb-PRF) on the wound healing activity of human gingival fibroblasts (HGFs) purported to be a regenerative biomaterial in surgical procedures. Materials and Methods: All assays were performed on three HGF groups, group I: complete media; group II: Alb-PRF, and group III: AA Alb- PRF. Alb-PRF was prepared following the protocol by Fujioka-Kobayashi et al. (2021). For preparation of AA Alb-PRF, 2,500 µg AA was added to the blood pre-centrifugation. All groups were subjected to 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay to estimate cell viability and proliferation, scratch assay for migration (0, 4, 12, and 24 hours) and transwell migration assay for chemotactic migration assessment (24 hours). Outcome variables were optical density (OD) for MTT assay, percentage of wound closure in scratch assay, and number of migrated cells in transwell migration assay. One-way ANOVA for MTT and transwell migration assays and two-way ANOVA for scratch assay with Bonferroni correction were performed with significance set at P<0.05. Results: Cell viability and proliferation (OD: 0.684±0.003 and proliferation: 28%) and wound closure (49.92%±1.62% at 4 hours and 61.39%±0.88% at 12 hours) were significantly higher in group III, while group II demonstrated the maximum number of HGFs migrating across the transwell membrane (9.25±2.49) with P<0.05. Conclusion: HGFs demonstrated a significant increase in viability and proliferation along with rapid wound closure in the presence AA Alb-PRF compared to Alb-PRF alone, indicating additional beneficial effects of AA. Thus, AA Alb-PRF potentiates the wound healing activity of HGFs and could be employed in oral, maxillofacial, and periodontal surgeries as a regenerative biomaterial.
ABSTRACT
BACKGROUND: To evaluate and compare the efficacy of antimicrobial Photodynamic therapy (aPDT), Local Drug Delivery (LDD) of 1.2 % Simvastatin gel as an adjunct to scaling and root planning (SRP) and SRP alone in the treatment of Periodontitis using clinical, microbiological and biochemical parameters. MATERIALS AND METHODS: A total of 33 test sites in 11 Grade A Stage II periodontitis patients were randomly divided into three groups: GROUP I: Treated by SRP alone (SRP group); GROUP II: Treated by SRP followed by aPDT (aPDT group); GROUP III: Treated by SRP followed by single subgingival application of 1.2 % simvastatin gel (SMV group). Clinical parameters including API, PBI, PPD and RAL were assessed. Quantification of Porphyromonas gingivalis was evaluated by RT -PCR technique and estimation of RANKL levels was checked by ELISA. All assessments were done at baseline and 3 months RESULTS: All three groups showed significant reduction in the scores of clinical parameters, P. gingivalis DNA copy numbers and GCF RANKL levels at 3 months post therapy compared to baseline (p < 0.05). On comparison between the three groups, the results were non significant for all parameters both at baseline and at 3 months post therapy (p > 0.05). However slightly greater reduction was seen in the mean scores of PPD and RAL in the SMV Group and in P. gingivalis DNA copy numbers and GCF RANKL levels in aPDT group compared to the other groups although statistically non significant. A significant positive correlation(p < 0.05) was observed between P. gingivalis DNA copy numbers and PPD scores in SMV group and a significant negative correlation(p < 0.05) was observed between P. gingivalis DNA copy numbers and API & PBI scores in SRP group at 3 months follow up. CONCLUSIONS: aPDT, 1.2 % SMV local drug delivery as adjunct to SRP and SRP alone are effective in improving clinical parameters, reducing P. gingivalis DNA copy numbers and GCF RANKL levels. The superiority of one over another modality of treatment could not be established in this short term study.