My DD had her wisdom teeth out in August. All four were impacted and her lower right side was a difficult tooth extraction. She experienced continuous numbness on her lower left cheek and lip for weeks afterwards. It slowly resolved itself after a month or two and she has had no further problems. If your DD is already feeling a tingling sensation, then it sounds like the nerve is already starting to heal. I'm sure she will be just fine. It will just take alittle more time.
To take the first step in faith, you don't have to see the whole staircase: just take the first step. - Dr. Martin Luther King