What are my chances of fully recovering from paresthesia after wisdom teeth extraction given my particular case? (photo)

Hi, I got my four wisdom teeth extracted 17 days ago. One of them was really close to the nerve. He made a coronectomy trying not to damage the nerve. Unfortunately he cut an aberrant artery and had to apply lots of pressure and coagulate. In this process my nerve was probably bruised, or damaged, so the first week I had no sensation at all on the left part of my chin and lip. It gradually got a bit better, but last week no notable improvement. What are my chances on improving? Recommendations?

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