One of the main forms of dental injury to occur from negligent treatment is nerve damage. Nerve damage can be particularly harmful and can even cause permanent damage in some circumstances.
The main nerve that is commonly damaged as a result of treatment is the trigeminal nerve, as it sits in close proximity to your mouth and jaw. The trigeminal nerve is responsible for sensation in your face and can cause issues with swallowing and chewing, which could lead to further psychological harm over time.
If the trigeminal nerve has been damaged, you may feel numbness or intense facial pain and should seek medical advice.