Negative Camber

[Snell]

I skid my front right wheel into a roundabout. It punctured the tyre and left a little dint in the alloy. The wheel now sits with a fair bit of negative camber but after taking the wheel off the wishbone and tracking rods don't appear to be bent at all. (Even if they were bent surely that would mean I'd have positive camber anyway)

My dads friend reckons I should get a new strut, then work from there. Which sounds right?

But thinking about it how did the contact between the bottom of the wheel and the curb cause the top of the wheel to go in or the bottom to come out? What else should I look at that could of caused this?

Thanks for any info