There's more to it than that. When the pressure comes off the nerves, there's no way to predict how they're going to respond. They might feel better, they rarely become more painful. You can get an arthosis that shifts or moves, the hardware positioning can change. You can get bone growth that puts pressure on nerves.
It's common to need a revision.
I think Luigi might have opted for a minimally invasive surgery with a higher risk of failure.
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There's no spacer or graft.