Table 1 Patient demographics

Gender, n

37

20

17

0.74

Males

15

9

6

Females

22

11

 17

Age, n

1.00

 20–35 years

5

3

2

 36–50 years

15

8

7

 51–65 years

14

7

7

 66–81 years

3

2

1

Smoking habits, n

1.00

 Non-smokers

36

19

17

 Smokers

1

1

0

Mean residual bone height (mm, range)

6.3 mm (5.5–7.0)

6.3 mm (5.5–7.0)

6.3 mm (5.5–7.0)

0.91

Implant position, n

0.63

 First premolar

6

3

3

 Second premolar

15

9

6

 First molar

22

10

12

 Second molar

2

2

0

History of periodontal disease, n

1.00

 No history

32

17

15

 History

5

3

2

Distribution of implants, n

1.00

 Single implant

30

16

14

 Multiple

7

4

3

Presence of posterior tooth/teeth

0.61

 None

4

3

1

 Presence

33

17

16

 First premolar

1.39 (0.90–1.92)

1.87 (1.83–1.92)

0.90 (0.90–0.92)

0.0495

 Second premolar

1.48 (0.86–2.00)

1.88 (1.70–2.00)

0.88 (0.86–0.88)

0.00

 First molar

1.29 (0.83–1.91)

1.81 (1.70–1.91)

0.86 (0.83–0.90)

0.00

 Second molar

1.80 (1.77–1.83)

1.81 (1.70–1.91)

- (.-.)