Table 1.

Comparison between zirconia, lithium disilicate, and PEEK hybrid-abutment-restorations regarding tightening torque (Ncm), loosening torque (Ncm), torque loss (Ncm), and percentage of torque loss (%)

	Zirconia	Lithium disilicate	PEEK	p value
Tightening torque	25.08 ± 0.13	25.12 ± 0.15	25.14 ± 0.19	0.70
Loosening torque	22.38 ± 0.68	22.49 ± 0.47	22.61 ± 0.59	0.68
Torque loss	2.70 ± 0.59	2.63 ± 0.46	2.55 ± 0.50	0.80
Percentage of torque loss	10.74 ± 2.39	10.45 ± 1.83	10.11 ± 1.99	0.79