It looks like those little what they call many implants that some doctors place during the temporization. Period x-ray. They look like they’re actually located type of attachments and are removable and if that’s the case, then they would be able to remove them back-and-forth to keep them clean if that’s not the case and their screw retains and they’re not removable, then the prosthetic would have to clearly have a convex surface on the intaglio surface. Otherwise it would be a giant food wrap and there would be no way to clean it. It’s hard to tell from the x-ray because maybe there is wrap acrylic where it’s properly shaped and contour or there’s no undercuts, but those would be the two options. Hopefully this helps.