I would have to agree with Dr Virk's assessment. A lateral cephalometric x-ray is the standared of the industry to assess whether or not teeth should be extracted. Measurements are made from the x-ray to determine the biological limits as to how much incisors can be moved anteriorly or posteriorly within the confines of the boney ridge (the alveolar process) in which they sit. Simply increasing intercuspal width can lead to recession on the cuspids and/or be a reason for orthodontic relapse.
I would certainly see a dental professional that can assess your individual situation with the tools that would necessitate making the correct decision. That professional would be a board certified or board eligible orthodontist.
Invisalign can correct the problem with or without extraction in the right situation.
