Broken Nasal Bone Remodelling?

All fractures will heal with some degree of callus formation.  Bumps after nasal fracture repair can be seen post procedure early on and resolve over time.  If the bumps persist, the edges can be reshaped to improve the appearance of the nose.

If after a few more months it is not going down, you will probably need another surgery. The bones don't remodel in the same way as other bones. What you see is either swelling, which will go away, or the bone edges. Time will tell.

The most important part of the previous rhinoplasty surgery is that the nasal bones are straight. The corners of the nasal bones, if prominent, can cause the top of the nose to have a square appearance. Bones do develop a callous to fix the bones together, and then the bone remodels itself to its original shape over time. This is true for nasal bones. Small irregularities and bumps do occur across the bridge, and they are only filed down if they can be seen, not felt.

Yes, you are correct. The nasal bones can heal with callus that can cause small irregularities or bumps. When I treat nasal trauma patients, they usually have to undergo revisions by shaving down the small bony protrusions. At 4 months, the nose may still be swollen so you probably want to wait a bit longer.

Part of the normal healing process from any fracture is callus formation and bony remodelling, and this is also true of nasal fractures. This can cause a sense of a bump to form along a fracture line that happened either from trauma or one that was created during surgery.
I'm glad to hear that your nose is straight. I would sit tight on this concern for a little longer and talk to your surgeon. If the bumps are subtle, there is a good chance they will disappear or diminish to the extent that you are no longer concerned. If they are significant, they may occasionally require a little smoothening, but this is not a very involved procedure. Consider waiting another 4-6 months and then reevaluate how things are settling.
Best,
Jason Litner, MD