Table 1 The mean of retention forces of the studied groups at the specified artificial aging periods, along with the results of the one-way ANOVA test, are presented.

From: In vitro study of retention forces in traditional and PEEK milled ball attachments with two retentive caps

Period (Cycles)

Group

N

Mean

Minimum

Maximum

Std. deviation

Std. error

F value

P value

T0

MBA-NC

10

18.44

17.5

19.5

0.75

0.33

23.356

0.000*

MBA-PC

10

37.32

31

45.7

5.55

2.48

PBA-NC

10

17.00

16

18.7

1.05

0.47

PBA-PC

10

34.30

26.3

45

7.90

3.53

T1

MBA-NC

10

16.44

15

19.1

1.62

0.72

28.918

0.000*

MBA-PC

10

33.06

27.8

36

3.36

1.50

PBA-NC

10

14.32

12.9

15.1

0.90

0.40

PBA-PC

10

31.68

25.5

43.2

7.24

3.24

T2

MBA-NC

10

13.02

11.4

15.6

1.71

0.76

14.897

0.000*

MBA-PC

10

25.38

19.8

30

4.65

2.08

PBA-NC

10

13.16

11.9

14.5

1.15

0.51

PBA-PC

10

27.62

21

37.9

7.46

3.33

T3

MBA-NC

10

10.42

9.8

11.9

0.85

0.38

14.610

0.000*

MBA-PC

10

20.10

13.8

26.4

4.89

2.19

PBA-NC

10

10.62

10

11.3

0.62

0.28

PBA-PC

10

24.38

18.8

34

6.46

2.88

T4

MBA-NC

10

8.94

7.8

9.9

0.92

0.41

9.860

0.001*

MBA-PC

10

14.76

10.8

19

4.02

1.79

PBA-NC

10

8.40

7

9.5

1.02

0.45

PBA-PC

10

19.36

14

29

6.06

2.71

  1. MBA-NC Metal Ball Attachments with Nylon Caps; MBA-PC Metal Ball Attachments with PEEK retentive Caps; PBA-NC PEEK Ball Attachments with Nylon; PBA-PC PEEK Ball Attachments with PEEK retentive Caps.
  2. *Statistically significant.
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