Hello, the "buck teeth" you said is the medical maxillary protrusion. Maxillary protrusion can be divided into two types: dental and bony. Dental correction is relatively easy, but bone correction is more difficult. Correction can generally be done at any age, but the best age is 12- 15 years old. The time of correction is generally 2-3 years, and the cost varies from place to place, ranging from 5000- 10000. If it is bony protrusion, it may be divided into two steps: 1. Correct it. 2. Maxillofacial surgery. This is the ideal way to do it.