What can i do to fix my "class ll" lower jaw?

See an Orthodontist: Ask your dentist to refer you to an orthodontist. The class ii jaw relationship may be solved with just braces, or you may need to have an oral surgeon working with the orthodontist to perform orthognathic surgery. Depends on how severe the class ii relationship is.

Molars only=class II: Class ii refers to the old orthodontic classification which refers to only the molars; normal is i, upper molar ahead = ii, upper molars behind= iii. A very incomplete diagnosis. Many factors lead to the relationships. Facial profile, occlusal stability and functionality all go into the proper diagnosis and treatment plan. Orthodontics alone is usually sufficient, ortho and surgery on occasion.

See an orthodontist: A class ii jaw may require orthognathic surgery. It your class ii relationship is only a molar class ii then surgery may not be necessary. Only a qualified dental professional will be able to tell you for sure.