Is It Possible to Restore Nasal Bone?

I assume you had a rhinoplasty before and that is why you are posing the question.
In rhinoplasty we remove the hump and that is composed of mostly cartilage and a little bone, that will affect the width of the dorsum.
Then the nasal bones are fractured and moved to close the open roof resulting from removing the hump.
If the nasal bones were brought in too much that will narrow the width of the nasal bones, then you need to have a repeat fracture of the bones and place the in a wider base.

What you are describing is a rather unusual problem. I would first and foremost suggest talking with your surgeon about your concerns and if possible, getting a second opinion from a facial plastic surgeon who specializes in revision rhinoplasty surgery.
In general, if you have a narrow nose, you can try to outfracture the bones or there are some more complicated reconstructive options that are available but these are more extreme and I would only use them as a last result in cosmetic work. Bottom line - there are options but talking with a surgeon in person would be your best bet.