Hi! i am 21 years old nd i have dental problem. the problem is that imy lower jaw is smaller then upper jaw and my dr recomended me that it will need?

Unclear: Your questions are unclear. Jaw size discrepancy problems need to be addressed by an Orthodontist. They may also work in conjunction with an Oral Surgeon if the problem is severe. At your age, surgery may be indicated.

Correction: As a non-growing Adult you will need both tooth and jaw alignment. See an Orthodontic Specialist who will team with an Oral Surgeon to help resolve your problem.