You need the comments of an expert who can actually examine him and who understands his difficulties at school. I don't think you can get an answer online.
Whether a vertebra fracture qualifies a person for disability depends on to what degree if affects their ability to work and to earn a living. If the person can still work after they recover, they may not get disability. Disability is not determined by the injury, it is determined by how much it affects you.
Most definately
The person had a multi-fracture due to the accident. It is a sentence containing the word multi-fracture.
In the acute phase, while it is healing, the person most likely has a temporary disability. Whether the person has a permanent impairment depends on how well the fracture heals and whether there are any residual neurological impairments. The person's treating doctor would be in the best position to answer this.
Closed spiral fracture
A fracture that shatters the bone is called a comminuted fracture. A direct impact can shatter bone into several fragments or pieces. This type of fracture is likely to occur in a road traffic accident.
open fracture
Compound Fracture
open fracture
A family member has done this. Symptoms were. Extreme pain and unable to stand initially. Then severe difficulty in walking for the first 24 hours. Continued difficulty in walking without support for the first few weeks (ie needed a stick). Difficulty in sitting and getting up from sitting. Pain between legs. feeling fine from stomach up. Pain in bottom, around cheeks of bum. Fracture discovered on x ray
open fracture
Open Fracture