Table 1 Patient and tooth characteristics at clinical crown lengthening procedures (T0)

Patient characteristics at T0

Experimental

Control

Total

p value

Age (mean ± SD)

55.8 ± 22.0

45.5 ± 16.6

50.6 ± 19.7

0.25 ^*

Gender (the number of subjects)

0.33 ^†

male

4

2

6

female

6

8

14

Postoperative analgesics (the number of subjects)

0.03 ^†

0 tablet

1 tablet

8 (80%)

2 (20%)

3 (30%)

7 (70%)

11 (55%)

9 (45%)

At home analgesics in total (the number of subjects)

0.21 ^†

0 tablet

7 (70%)

4 (40%)

11 (55%)

1 tablet

1 (10%)

5 (50%)

6 (30%)

2 tablets

1 (10%)

0

1 (5%)

3 tablets

1 (10%)

1(10%)

2 (10%)

Tooth characteristics at T0

At deep caries site

(mean ± SD; mm)

Experimental

(n1 = 10)

Control

(n2 = 11)

Total

(N = 21)

p value

Gingival recession

-1.1 ± 0.7

-1.1 ± 0.5

-1.1 ± 0.6

0.97 ^*

Pocket depth

2.8 ± 0.9

2.5 ± 0.9

2.7 ± 0.9

0.54 ^*

Crestal bone level

1.78 ± 0.8

1.41 ± 0.7

1.6 ± 0.7

0.24 ^*