Assessing the Effectiveness of Laser Therapy in Managing Chronic Periodontitis

Thesis Abstract

Chronic periodontitis is a prevalent inflammatory oral disease characterized by progressive destruction of the periodontal ligament and alveolar bone, often leading to tooth loss and diminished oral health-related quality of life. Despite conventional periodontal therapies such as scaling and root planing (SRP), persistent pockets and ongoing inflammation remain significant challenges, prompting exploration of adjunctive treatments. Laser therapy has gained attention for its potential to enhance periodontal healing due to its antimicrobial, biostimulatory, and tissue-regenerative properties. However, the clinical efficacy of laser therapy compared to traditional modalities remains inconclusively established, necessitating rigorous empirical evaluation. This study aims to assess the effectiveness of laser therapy as an adjunct to standard periodontal treatment in managing chronic periodontitis. Specific objectives include evaluating clinical periodontal parameters—probing pocket depth (PPD), clinical attachment level (CAL), bleeding on probing (BOP), and plaque index (PI)—before and after treatment, assessing microbial profile changes, and determining patient-reported outcomes such as pain and discomfort. The overarching purpose is to provide empirical evidence to inform periodontal treatment protocols and optimize patient care. A quasi-experimental, controlled clinical trial design was employed, adhering to the Declaration of Helsinki and approved by an institutional ethics committee. The study population comprised 120 adult patients aged 30 to 60 years diagnosed with moderate to severe chronic periodontitis, recruited from periodontal clinics within a metropolitan dental hospital. Participants were randomly assigned to two groups an experimental group receiving SRP combined with low-level diode laser therapy (wavelength 810 nm, power 0.5 W, continuous wave, applied for 30 seconds per pocket) and a control group receiving SRP alone. Inclusion criteria mandated systemically healthy status, absence of recent periodontal therapy, and baseline periodontal measurements within specified ranges. Exclusion criteria included smoking, pregnancy, and systemic conditions affecting periodontal health. Data collection instruments encompassed standardized periodontal probes for clinical measurements, microbial sampling kits for microbiological analysis, and validated questionnaires for patient-reported outcomes. Clinical parameters (PPD, CAL, BOP, PI) were recorded at baseline, one month, and three months post-treatment. Microbial samples underwent quantitative polymerase chain reaction (qPCR) to quantify key periodontal pathogens, including Porphyromonas gingivalis and Tannerella forsythia. Patient-reported pain and discomfort were assessed using a Visual Analog Scale (VAS). Data analysis involved descriptive statistics to summarize baseline characteristics, paired t-tests and repeated measures ANOVA to compare clinical outcomes within and between groups over time, and multivariate regression analysis to identify predictors of clinical improvement. Microbiological data were analyzed using non-parametric tests such as the Mann-Whitney U test to compare pathogen loads. Thematic analysis was applied to qualitative patient feedback on treatment experience. The theoretical framework integrated the Biochemical Mediator Theory of periodontal disease and the Health Belief Model to interpret behavioral responses and treatment adherence. It is anticipated that findings will demonstrate a statistically significant greater reduction in PPD, CAL, and BOP, along with decreased pathogenic bacteria loads in the laser therapy group compared to controls, supporting the adjunctive role of laser therapy. Additionally, improved patient comfort and satisfaction are expected outcomes. These results will contribute to filling existing knowledge gaps regarding the clinical and microbiological benefits of laser adjuncts in periodontal therapy. The study concludes that laser therapy, when integrated with conventional SRP, offers a promising avenue for enhancing periodontal healing and long-term disease management. Main recommendations include incorporating laser therapy into periodontal treatment protocols for suitable patients and advocating for further long-term studies with larger sample sizes to validate these findings. Future research should explore varied laser parameters and modalities, as well as cost-effectiveness analyses, to optimize clinical guidelines for managing chronic periodontitis using laser technologies.