Question : When removing a hump, how do you know if this requires an osteotomy or if it can be filed down with a rasp?
Answer : The first thing is to determine whether or not the hump is bony or cartilaginous. If the hump is cartilaginous, it has to be cut using a scalpel or an osteotomy. If the hump is bony, it can be removed using either a rasp or an osteotomy. A rasp is an instrument with a rough surface. It cuts by using a back and forward motion. An osteotomy is a sharp blade that cuts using the sharp edge. Depending on the type of bony deformity, either a rasp or an osteotomy can be used. If just a slight filing is needed, then the rasp is very good. If a larger cut is needed, an osteotomy can be very useful. One drawback with an osteotomy is if you take off a large piece, and you may have to put some of it back afterwards. With a rasp, you can gradually lower the dorsum.