Can I Sue Over My Dentist Severing My Lingual Nerve

About 6 months ago I 21 (F) had my wisdom teeth removed by my dentist. During the operation he accidentally severed my lingual nerve (although he did not inform me of this at the time) and caused me to lose feeling in the lower half of my jaw and tongue (left side). Due to this I have experienced a speech impediment, difficulty eating and swallowing pills, discomfort and pain, and just overall annoyance at the numbness. He recently referred me to a specialist but this is expensive. Is there any way I could be compensated by the dentists office? Or did I sign off on this when I got them removed
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