If jaw bone grew around the healing abutment you are one of the lucky ones. More often then we like we loose a little bone during healing. If the bone is over the healing abutment then that means the implant is fully covered by strong bone. The bone around the abutment can be easily trimmed away.
This is absolutely normal when the bone grows slightly around implant. Usually it happens when the healing abutment was loose or lost. It can be easily corrected before restoring the implant.