Help Repair Nerve Damage After Mentalis Re-suspension?

Already had re-suspension-was during this that nerve branch severed. Desperate trying to find ways to repair nerve. Very depressed with numbness. I was told it was a tiny branch - think he said about 1mm or 1.50mm cut and would try to go back in at 3 mths if really bothered me. Could I not have the nerve end grafted if end cannot be found? Can anyone point me in right direction for best authority in the world on this subject? Prepared to travel anywhere.

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