Video vs. Model-Based Oral Hygiene Instruction in Gingivitis Patients

This randomized, single-blind clinical trial aims to evaluate the short-term effectiveness of two different oral hygiene instruction (OHI) methods-video-assisted instruction versus traditional 3D model demonstration-on periodontal clinical parameters in patients diagnosed with gingivitis. A critical secondary objective of this study is to investigate the predictive role of patients' baseline Oral Hygiene-Related Self-Efficacy (OHSE) on the extent of clinical healing, and to assess changes in patient-reported subjective gingival health using a Visual Analogue Scale (VAS). A total of 80 patients undergoing standard Phase 1 periodontal therapy (scaling and root planing) are randomly assigned in a 1:1 ratio to either the video instruction group or the model instruction group. Periodontal clinical indices, including Plaque Index (PI), Gingival Index (GI), Probing Depth (PD), and Bleeding on Probing (BOP), alongside patient-reported outcomes, are recorded at baseline and at a one-month follow-up by a blinded examiner. The primary hypothesis is that video-based instruction is non-inferior to conventional model-based instruction in improving clinical parameters. Furthermore, the study hypothesizes that a patient's baseline self-efficacy level-independent of the educational method received-significantly predicts the reduction in periodontal inflammation and bleeding scores.

Inclusion Criteria: Patients officially diagnosed with plaque-induced gingivitis. Patients having an average whole-mouth Gingival Index (GI) score strictly above 2.0 at baseline. Patients aged between 18 and 65 years. Patients who have provided written informed consent to participate in the study. \- Exclusion Criteria: Individuals with an average whole-mouth Gingival Index (GI) score of 2.0 or below. Individuals presenting with periodontal pockets deeper than 4 mm in any single area of the mouth. Individuals who possess fixed prosthetic restorations on any tooth. Individuals who have received any form of professional periodontal treatment within the last 6 months. Individuals who currently smoke or use similar tobacco products. Individuals who have used systemic antibiotics for any medical or dental reason within the last 3 months. Individuals who are physically or cognitively unable to perform adequate daily oral hygiene practices. Individuals who have lost 5 or more natural teeth (excluding third molars/wisdom teeth). \-