The Accuracy of New and Aged Mechanical Torque Devices Employed in Five Dental Implant Systems

Table 2

Accuracies of new and aged wrenches.

Implant; system	Target; value	t	95% confidence interval of the difference		Mean; difference	p value
			Lower	Upper
Biohorizons (used)	30	−11.363	−7.4400	−5.1527	−6.29642	p < 0.05
Biohorizons (new)	30	−17.090	−7.2347	−5.6755	−6.4551	p < 0.05
Bredent (used)	30	0.358	−2.5709	3.6493	0.5391	p < 0.05
Bredent (new)	30	−0.369	−2.3513	1.6386	−0.3563	p < 0.05
Implant KA (used)	25	−3.885	−2.8184	−0.8626	−1.8405	p < 0.05
Implant KA (new)	25	−8.605	−3.2377	−1.985	−2.6114	p < 0.05
Straumann (used)	35	−8.754	−6.3950	−3.9549	−5.1749	p < 0.05
Straumann (new)	35	−7.132	−6.2778	−3.4599	−4.8689	p < 0.05
Zimmer (used)	30	−5.906	−5.1007	−2.4588	−3.7798	p < 0.05
Zimmer (new)	30	−2.784	−3.7592	−0.5582	−2.1587	p < 0.05