Table 3.

The operating time (s) of three different tightening methods in each system.

Tightening method	System
	Nobel	Straumann	WEGO
A	626.65 ± 1.68a	623.94 ± 1.43a	616.86 ± 0.97a
B	29.46 ± 1.47b	28.47 ± 1.42b	18.79 ± 1.15b
C	21.34 ± 1.63c	19.04 ± 1.12c	11.66 ± 0.78c

Within the same column, mean values followed by the same letter are statistically similar (P > 0.05), mean values followed by different letters are statistically different (P < 0.05) in each implant system using different tightening methods.