You will never know if the changes you've observed are related to trauma or just the normal physical changes that occur as we mature. Regardless of the etiology an experienced rhinoplasty surgeon can correct the excess nasal width you describe.
Most likely it is a natural hump that has happened over time unrelated to the injury.It can be reduced using normal rhinoplasty techniques.
A rhinoplasty can be done to straighten your nose as well as remove the nasal hump and refine the tip. This will give you a more functional nose as well as a more attractive nose. See a very experienced rhinoplasty surgeon for the best results.
A rhinoplasty procedure can accomplish shaving down the dorsal hump, straightening the nasal bones after previous trauma, and narrowing the bridge line. For more information and many examples, please see the link and the video below
You would need to be seen in person to be properly evaluated. The two photos are not the same view so it is hard to say.