Table 2.

Fatigue resistance of the connectors subjected to the rotating-bending test

	F50	SD	Upper	Lower
External hex interface	53.5	7.80	49.5	57.5
Cone-in-cone interface	44.0	2.49	42.3	45.7
Internal hex interface	45.0	3.40	43.1	46.9

F₅₀=mean failure level (force level at which 50% of the samples survive and 50% fail before 10⁶ cycles). When the interfaces with overlapping CIs were combined, 1 group was identified: group A - external hex interface. SD= standard deviation