Comparative Sensitivity Of GI And BI In Assessing Gingivitis

To evaluate the sensitivity differences between Gingival Index (GI) and Bleeding Index (BI) in dynamic monitoring of gingival inflammation and clarify their clinical applications. This study utilized a randomized, double-blind, controlled, single-center design, approved by the ethics committee. Eighty chronic gingivitis patients were enrolled and randomly assigned to Group A or B, using Toothpaste A or B, respectively. Both groups received standardized supragingival scaling. GI and BI were assessed by the same examiner at baseline and at 1/2/3 months of toothpaste use. Data were analyzed using nonparametric tests and t-tests. In Group A, GI decreased by 11.08% and 13.41% at 2 and 3 months, respectively (p<0.05), and BI decreased by 14.89% and 19.81% (p<0.05). In Group B, GI decreased by 2.72% and 0.94%, and BI decreased by 2.79% and 0.85%. At 2/3 months, Group A showed significantly greater reductions in GI (17.34%/22.42%) and BI (22.23%/29.37%) compared to Group B (p<0.05). The BI demonstrates higher sensitivity in detecting early-stage gingival inflammation and minor changes, making it suitable for short-term efficacy evaluation and early inflammation detection. GI provides a comprehensive assessment of gingival color, swelling degree, and bleeding status, offering more stable evaluation of structural changes in moderate to severe inflammation and is suitable for long-term monitoring of overall gingival health trends.