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Table 6 Mean ± SD of percentage initial and percentage post load RTL2 and percentage difference between initial and post load RTL2 for GIIA and GIIB

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 2 Narrow diameter T-test
Retightening New screw t P value
Initial Range 41.33 47.67 21 23.67 18.601 < 0.001*
Mean ± SD 44.666 ± 2.418 22.600 ± 1.091
Post load Range 43.33 50 53.67 61 − 5.491 0.001*
Mean ± SD 47.598 ± 2.734 57.734 ± 3.092
Paired test P value 0.036* < 0.001*  
% Difference Range 3.65 15.38 143.94 165.08 − 32.431 < 0.001*
Mean ± SD 6.636 ± 4.913 155.532 ± 9.014
  1. *Statistical significant