Fig. 3

a. Forest plot comparing CAL at 3-months with manual subgingival scaling versus ultrasonic subgingival scaling of initial PPD > 4 mm in terms of the following: 2.1.1 initial PPD4-6 mm; 2.1.2 initial PPD ≥ 6 mm. b. Forest plot comparing CAL at 6-months with manual subgingival scaling l versus ultrasonic subgingival scaling of initial PPD were shallow in terms of the following: 2.2.1 initial PPD ≤ 4 mm;2.2.2 initial PPD4-6 mm; 2.2.3 initial PPD ≥ 6 mm