The mouth is long, which has the following conditions: overgrowth of maxilla, overgrowth of maxilla, overgrowth of mandible and overgrowth of maxillary front teeth. Your situation is unclear. Simple anterior overbite can be corrected by orthodontics. But what is certain is that orthodontics can't completely improve your mouth length in the case of jaw overgrowth. In the case of orthognathic surgery, it may be necessary to improve the appearance of maxillofacial region.

In the case of nasolabial groove, it is also necessary to consider the comprehensive situation of teeth, maxilla and lip muscles. In the case of the latter two reasons, simple orthodontics may not achieve the effect you want, and oral plastic surgery is needed.

I hope my answer can help you solve your doubts!