Can invisalign be used for retreatment of protruding lower jaw. the 1st lower premolar needs to be extracted and the space filled. class 3 bite. ?

Evaluation: You need to be evaluated by an orthodontist & oral surgeon, specialists who can actually examine you and review your radiographs and amount of skeletal discrepancy. Invisalign treatment moves teeth, not bones. Correcting your bite may somewhat help but it is no substitute for surgery.

Absolutely not: You need the services of a qualified Orthodontic Specialist and probably a qualified Oral Surgical Specialist. Invisalign won't do it. If you had a broken leg would wrapping it in Saran Wrap work?

No: By the way your question is worded, you are being assessed by a general dentist who is attempting to treat a skeletal malocclusion with inappropriate treatment. See a BOARD CERTIFIED orthodontist for a work up. He/she will likely ask for an oral surgery consultation.

No: Invisalign is a great product, but no way it can address a class 3 effectively. If you are lucky, an orthodontist may be able to address without surgery, but there's a decent chance you may need both braces and oral surgery-- sorry, know its not what you were hoping for!