Of course. Many elbow fractures are non displace and need no treatment. There are several different types of fractures of the elbow in children and if they are displaced or angulated, then surgery is necessary. Some of the surgery can be just pushing the bone into the correct alignment and then putting on a cast and sometimes a pin to hold it in place while it heals. Others require surgery to fix the bone.
Several. Depends n the specific nature, location and degree i'd displacement of the fracture. Some require surgical fixation while others need time and a splnt. Get an expert opinion quickly so all your options are available.