International Journal of Implant Dentistry

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
% RTL 2		Standard diameter			Narrow diameter			t	P value
Initial	Range	17.67	−	46.67	21	−	47.67	− 0.063	0.951
Initial	Mean ± SD	33.301	±	11.894	33.633	±	11.763	− 0.063	0.951
Post load	Range	46.67	−	57.33	43.33	−	61	− 0.327	0.747
Post load	Mean ± SD	51.966	±	3.120	52.666	±	6.009	− 0.327	0.747
Paired test	P value	0.002*			0.007*
% Difference	Range	9.37	−	190.57	3.65	−	165.08	− 0.056	0.956
% Difference	Mean ± SD	79.177	±	72.697	81.084	±	78.773	− 0.056	0.956

*Statistical significant

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