Table 1 Demographics and clinical characteristics of test and control groups

Age (years)

 Median (range)

52.0 (43–61)

54.5 (25–59)

52.5 (45–62)

47.0 (32–60)

0.583^a

Gender

 Male

3

8

2

6

 Female

5

4

2

1

0.452^b

Number of teeth

8

12

4

7

Tooth position

 Maxillary first molar

5

7

4

6

 Maxillary second molar

3

5

0

1

0.106^b

Probing depth (mm)

 Mean ± SD

5.5 ± 1.6

6.2 ± 1.3

6.6 ± 1.0

5.3 ± 1.6

0.595^c

Clinical attachment loss (mm)

 Mean ± SD

7.6 ± 1.5

8.2 ± 1.7

8.7 ± 2.1

7.9 ± 1.9

0.512^c

Gingival recession (mm)

 Mean ± SD

2.3 ± 1.1

2.3 ± 2.1

3.1 ± 2.5

2.8 ± 2.2

0.444^c

Bleeding index

 Mean ± SD

3.2 ± 1.0

3.7 ± 0.4

3.8 ± 0.3

3.2 ± 0.7

0.498^c

Alveolar bone loss (%)

 Median (range)

70.4

(62.0–100)

83.7

(70.4–100)

77.2

(65.4–100)

85.1

(68.9–100)

0.683^a

minRABH (mm)

 Median (range)

1.26

(0.22–5.25)

0.59

(0.10–2.28)

1.06

(0.53–5.73)

0.65

(0.13–2.67)

0.729^a

Healing time (months)

 Median (range)

6.0 (5–10)

6.0 (5–8)

7.0 (5–10)

6.0 (4–11)

0.555^a