Table 2 Percentages of various tissues in the antrostomy area after 4 months of healing. Mean values ± standard deviations (P values) and median (25%; 75% percentiles)

Bone

Soft tissue

Pure graft

Interpenetrated graft

Composite bone

Replaced window

Center

61.5 ± 46.9

82.5 (22.2; 96.9)

21.7 ± 22.6*

17.5 (3.1; 34.4)

2.3 ± 4.3*

0.0 (0.0; 2.3)

7.9 ± 19.3

0.0 (0.0; 0.0)

69.3 ± 38.5

82.5 (57.6; 96.9)

Edge

37.2 ± 37.0

21.6 (16.8; 55.8)

41.0 ± 39.8

33.6 (9.2; 64.9)

5.3 ± 7.3

1.6 (0.0; 9.1)

13.8 ± 19.0*

6.7 (0.0; 19.7)

54.8 ± 34.1

62.9 (37.5; 69.7)

Membrane

Center

5.8 ± 2.1 (P = 0.116)

5.0 (4.2; 7.1)

52.0 ± 11.8* (P = 0.028)

51.5 (42.5; 60.5)

12.7 ± 10.7* (P = 0.043)

13.8 (4.6; 17.2)

29.4 ± 8.3 (P = 0.075)

30.3 (26.4; 33.5)

35.3 ± 10.0 (P = 0.075)

35.3 (30.6; 41.8)

Edge

9.2 ± 9.6 (P = 0.116)

6.5 (5.0; 9.0)

40.7 ± 18.3 (P = 0.917)

36.5 (29.6; 53.9)

16.2 ± 12.8 (P = 0.116)

15.9 (10.1; 17.9)

34.0 ± 16.3* (P = 0.046)

31.7 (20.0; 45.8)

43.2 ± 16.8 (P = 0.600)

44.3 (30.2; 53.0)