My daughter is almost 4 years old in 2 weeks. Monday she went to a dental appointment and she has no cavities her teeth look good. But they had 1 concern on her xray. They diagnosed a periapical lesion on the right lower 1st molar distal root. They sent me the xray an the right root looks to be dissolved. They want her to see a oral surgeon for follow up. My question how concerned should I be ? I'm very worried. She does have a bad habit of grinding her teeth every night when she is sleeping. Other than that I'm not sure what could cause this. Can someone give me advice. She has pain off and on on that tooth when she eats crunchy foods. But not all the time.