I have had braces a long time ago, however my top teeth still slightly protrude out. I was told previously that I would need extractions if I wanted my teeth perfect. Would it be possible to straighten this angle protrusion through IPR and Invisalign? Really would like to avoid a 4 tooth extraction. Also, how long would treatment time normally look like for this type of case? My teeth are and bite feel good but the angling of my teeth have always bothered me. Thanks