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Table 2 Mean ± SD of percentage initial and percentage post load RTL2 and percentage difference between initial and post load RTL2 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 2 Groups T-test
Standard diameter Narrow diameter t P value
Initial Range 17.67 46.67 21 47.67 − 0.063 0.951
Mean ± SD 33.301 ± 11.894 33.633 ± 11.763
Post load Range 46.67 57.33 43.33 61 − 0.327 0.747
Mean ± SD 51.966 ± 3.120 52.666 ± 6.009
Paired test P value 0.002* 0.007*  
% Difference Range 9.37 190.57 3.65 165.08 − 0.056 0.956
Mean ± SD 79.177 ± 72.697 81.084 ± 78.773
  1. *Statistical significant