Is It Possible to Restore Nasal Bone?

For individuals who have had their nasal bones too narrowed creating an hourglass effect or just too narrowed at the dorsum, there are several options.
Dorsal onlay grafts can be used or the bones can also be outfractured in conjunction with some grafting in the middle and upper third of the nose with cartilage to widen the nose. Implants can also be used but they are less desirable, in my opinion, due to hardness and risk of mgiration, extrusion and asymmetry. I hope this information helps.

This is an unusual and difficult situation. If I understand you properly, It is my impression that your best long term solution may be to undergo "out fracture" of your existing nasal bones, if possible. Other than that, there are a whole host of options that we use for reconstructive rhinoplasty that relies on the use of autogenous graft materials.

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.

The answer begins with why are the nasal bones gone in the first place? If they are gone due to rhinoplasty then restoring them can be performed with several techniques.
Depending on the desired outcome, cartilage can substitute for the nasal bones, calvarial (skull) cone can be used, as can some other materials.

The best way to restore the width is with cartilage but other material such as fascia or Alloderm or bone may also be used.  Implants can also be used such as Gortex PTFE or other material but they can shift or become infected.

Depending on how narrow your nose is, there would be two ways to try to restore some of the width. If the upper third of the nose is too narrow, this is very difficult to fix. Sometimes you can do a controlled break of the bone to move it outward, but this does not always work.
Thick nasal bones would tolerate this better then thin nasal bones. An alternative is to do what you suggest and use your own cartilage or an implant to restore width. If a subtle amount of width is required, acellular dermis could be used or even hyaluronic acid fillers.

Nasal reconstruction and augmentation can be accomplished with the use of cartilage grafts from the nasal septum, the ear, or the ribs. Bone grafts harvested from the skull are another alternative. It is best to use the patient's own tissue, rather than artificial material.