Figure 2. Conventional and Cumulative Meta-analyses of 5 Trials of Systemic Antimicrobials as an Adjunct to Scaling and Root Planing for Deep Periodontal Pockets (> = 6 mm at baseline): Difference in Mean Gain in Clinical Attachment Level and 95% CI (SRP + antimicrobial vs. SRP alone) in mm (key as for Fig. 1).