Hi Mr. lybrate-user. First of all we should see whether it is dental class 3 malocclusion or skeletal class 3 malocclusion or both. After that only we can decide the treatment. And if surgery is nedded go for that also. Maximum the duration will be around 18 to 24 months.
depending on space requirement, it is decided which teeth to extract. and to maintain symmetry and balance two or four teeth are extracted if needed. yes orthodontic treatment can be done by extraction of two premolars also