My brother has MS and uses two crutches for locomotion. We use a Disney wheelchair and he was able to go on almost everything, since most rides can be stopped for loading.
My recommendation is that you pay close attention to the disability information on the park guide map for each attraction (and is repeated on the ride signs) as to whether the ride can be stopped for loading and / or if the rider will need to take steps from wheelchair to ride car. Based on this information, your daughter can decide what she can handle.
Note: I've seen many casted / bandaged people hop on rides without any problem, without the ride being stopped for loading. If you think you want the ride stopped for loading, don't assume the cast member will automatically know this. Ask.
Note: Last summer, I went to Disney for 3 weeks 2 weeks after an abdominal hysterectomy. I used the wheelchair and went on everything that didn't have G-forces associated with it. I was surprised how many people were recuperating from surgery / injuries there. I think it is becoming more common, as some surguries are becoming less invasive, but people still need time off to recover / rest. I had more than one person ask me how well it was going because someone they knew was thinking about going to Disney for post-op hysterectomy recovery. It's probably not for everyone, but, for me, it beat hanging around the house!!!