Possible Failing/Failed Dental Implant

I had a dental implant procedure performed on tooth #7 over the course of about a year (non-immediate loading) in 2007-2008.

There was some concern regarding the amount of bone I had in the area since the implant was placed in a location where I had never had an adult tooth.  I was informed that I might need a bone graft, and I remember paying for the bone graft prior to the operation.

Presently, the implant has never bothered me or been a source of pain.  One day, I happened to notice that the implant felt a little loose.  When I say "a little", I mean the movement is almost imperceptible.  If I delicately wiggle the crown of the implant with my thumb and place my pointer finger between my upper lip and the front of my gums, I can just barely notice the slightest bit of motion of what I assume must be the end of the rod of the implant.

The crown itself does not feel loose at all.  There is no pain associated with the looseness.

Unfortunately, I can't recall if this looseness has always been there, or if it's a new development.  All I know for sure is that I hadn't noticed it until recently.

I do remember always being able to feel a slight bump in the front of my gums where the implant is located, which I assumed was the end of the rod of the implant.

As a precautionary measure, I made an appointment to check on the condition of the implant at the offices of the oral surgeon who had performed the surgery.  Unfortunately, the original surgeon was no longer working at the office, so a different surgeon performed the checkup.

He was able to detect the looseness, said there was nothing to be concerned about, and ordered a set of dental CT scans to determine if a new bone graft would be required to add stability to the implant.

He stated that any required procedures would not be covered under a warranty or guarantee of the implant.  Is this normal?  Shouldn't there be some kind of warranty period covering the implant in case it fails by no fault of the patient?

[Jerome Tsang, DDS]

Warranties are determined by the dentist or oral surgeon who treats the patients.  Each office has its own policies on what is or isn't covered by a warranty.

Have you checked to see if maybe the crown is loose but not the implant itself?  Who was the dentist that placed the crown on?