12 months post op. Why do I have the dent?? (photos)

I had open rhinoplasty 12 month ago - dorsal hump removal + some work to my tip. What's happened? Why is there a dent? Is it too much rasping? what can be done to fix it? I have thin skin, my surgeon says that's the reason. Please help and suggest the way to make it look good and not like a broken nose :(((( is rasping the still sticking out bridge an answer or putting cartilage in the place of dent? I would appreciate your opinions. Thank you

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