Hello africannose,
Thanks for your question. I was trained in rhinoplasty at MEETH in NYC, a city with a large number of all ethnic groups. Your question was pondered alot. What I was taught is that African-American nose could be thought of in three basic varieties: 1) subSaharan-African, 2) European-African, and 3) Native American-African. The subSaharan-African nose tends to be broader and flatter at the tip and bridge. There is a similarity to East Asian noses. It is more difficult to make a defined, sharp nose without aggressive cartilage grafting, defatting techniques, and use of artificial implants. The European-African nose tends to look more like a nose of someone of European descent but just transplanted onto the face of someone who is African-American. These noses tend to be smaller, often with more angular features, and a mild hump on the dorsum. One thought is that it comes from the mixing of different ethnicities. Improving this type of nose requires smaller adjustments to blend in the features while maintaining the angularity. Finally, the Native American-African nose tends to be almost hooked appearing with a fairly pronounced bony hump. Again the thought is that it comes from the mixing of different ethnicities. Hump reduction and exact bony work are the focus in this type of nose.
I'm not really sure if any of the above is really the case, but it makes sense. When I am improving an African American nose, I try to take in multiple factors to decide how to make the improvements happen. It is important to know where you are starting from and what you are working with. Realistic expectations are key in successful rhinoplasty.
Good luck,
Dr. Shah