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Table 1 Mean ± SD of percentage initial and percentage post load RTL1 and percentage difference between initial and post load RTL1 for GI and GII (regarding the screw loosening)

From: Effect of dynamic cyclic loading on screw loosening of retightened versus new abutment screw in both narrow and standard implants (in-vitro study)

% RTL 1

Groups

T-test

Standard diameter

Narrow diameter

t

P value

Initial

Range

31.33

−

33.4

20

−

30

8.179

< 0.001*

Mean ± SD

32.491

±

0.821

24.501

±

2.978

Post load

Range

36.67

−

42.5

40.33

−

47.67

− 4.488

< 0.001*

Mean ± SD

39.282

±

2.255

43.766

±

2.213

Paired test

P value

< 0.001*

< 0.001*

 

% Difference

Range

10.01

−

35.57

37.78

−

118.33

− 7.398

< 0.001*

Mean ± SD

21.039

±

8.758

81.110

±

24.139

  1. *Statistical significant