Filing Vs Tooth Extraction For Invisalign

IPR (interproximal reduction or slenderizing teeth) is very common in orthodontics, not just Invisalign.  Normally, only a little is done, around .5 mm, so the integrity of the teeth is not affected.  IPR is usually all that is needed for the majority of cases, but extractions still happen from time to time.

The filing of the enamel is safe and effective way to gain space for tooth movements. I dont think removing a wisdom tooth will help you that much...maybe after Invisalign you can have them removed for jaw stability if you like but helping with invisalign is minimal..

I would that filing (IPR - Interproximal Reduction) would be more of an option that I would lean towards.  You can take up to a 1/2 mm inbetween the teeth to gain some space overall for reduction of the protrusion.  I would make sure that this technique is done properly in order to protect the integrity of the tooth structure.  Without seeing the panoramic x-ray it is very difficult to make any assumptions about the 3rd molars, but in my experience extracting 3rd molars has not proven to be beneficial to complete our orthodontic treatment goals.  Having said that, 3rd molars are usually extracted anyway since they really don't help with occlusion and they tend to cause other dental problems (perio defects, cavity possibilities, root canal issues).