Fixing IKEA Stolmen into concrete ceiling
This is one of the few applications where the nature of the anchor doesn't matter much.

All of the forces to move the piece are lateral, and the main factor is the shear strength of the screws. There is no tension pulling down since the piece is fully supported at the base.

Tapcons have their advocates, but I find them difficult to get them just right. I might use other masonry anchors, such as lead anchors, less flexible than plastic.

As long as the screws are strong and the fit is pretty tight, any system should work.