The "equipment" that is implanted isn't just an abutment. It's a titanium rod, which (to my knowledge) doesn't screw into the skull - it's sunken into the skull and depends on the bone of the skull to calcify and hold it in. Which is why poor bone density leads to a loose rod. On top of the titanium rod is the abutment, which is screwed into the rod. The processor is then attached to the abutment. Abutments are easily changed with a screw driver; rods, since they are sunken into the skull, are harder to get out. If the bone calcifies it is very difficult to remove the titanium rod - I read somewhere that they'd actually have to remove the area of the skull that it's sunken into. But rods that aren't calcified aren't that difficult to remove; basically they are "loose".
90 days used to be the norm for calcification, but Cochlear changed their equipment in the not so distance past - the material it's made of now is similar to what is used for dental implants - and supposedly the waiting period is only 60 days. However, not all docs are going with the 60 days, some (like mine who is very conservative) are still sticking to the 90 days.
When I had my first post implant appt. with my doc, he never mentioned whether or not it was calcifying so I can't tell you where my implant was "at" 10 days after my surgery.
As Liz said, 10 days out of 90 is a pretty short time frame and a lot can happen in the interim, plus we all heal differently and at different rates. Maybe what takes one person 10 days to accomplish takes another 20.
In the meantime, I'm keeping my fingers crossed
Jan
