Table 5 Closed pockets (%) with PD ≤ 4 mm and no BOP at 3 and 6 months in the test (SRP plus FO) and control (SRP alone) groups. Data are mean ± SD

Stage III grade B

62.6 ± 18.22

66.7 ± 19.20

41.7 ± 14.37

43.6 ± 15.25

0.0003

0.0001

Stage III grade C

60.7 ± 16.78

61.4 ± 17.04

40.1 ± 11.29

46.4 ± 16.17

0.0001

0.0032

Stage IV grade B

39.0 ± 12.24

51.4 ± 15.38^#

30.0 ± 11.01

45.0 ± 13.88^#

0.0886

0.1956

Stage IV grade C

53.5 ± 18.37

61.2 ± 17.71^#

55.2 ± 15.41

68.8 ± 19.77^#

0.3768

0.0966

Single-rooted

56.6 ± 16.24

70.9 ± 19.10^#

41.2 ± 10.89

51.1 ± 16.76^#

0.0001

 < 0.00001

Multi-rooted

53.5 ± 19.51

57.9 ± 15.63

50.2 ± 12.21

55.2 ± 15.29

0.1827

0.2469

F1

52.0 ± 13.45

56.0 ± 16.42

45.2 ± 13.18

61.3 ± 18.04

0.3022

0.3535

F2

61.0 ± 17.01

58.5 ± 18.54

48.9 ± 16.24

51.1 ± 16.43

0.1313

0.2563

F3

14.3 ± 6.88

28.6 ± 9.23

16.7 ± 5.69

16.7 ± 6.94

0.4420

0.31040

VBL ≥ 3 mm

41.7 ± 17.42

47.2 ± 16.13

34.8 ± 10.99

52.2 ± 14.15

0.2967

0.35460