Is It Required That Teeth Are Shaved to Correct Crowding with Invisalign? Can Teeth Not Be Shaved with Invisalign?

Whether or not slenderizing or narrowing of the teeth is necessary depends on the severity of the crowding.  Any time there is crowding, space needs to be somehow created.  There are 3 ways to do this either singly or in combination: widen (expand) the arch, take out a tooth (or teeth), or make some of the teeth slightly skinnier.  Most crowded cases are due to narrow dental arches so it's better to expand, however this takes time and is best done with traditional braces.  For a 15-year old with crowding, it's most likely due to narrow arches, so I would have several orthodontic opinions before allowing someone "shave" the teeth.  Hope this helps!

Cuz he was disqualified from doing it? If this is the case then he didnt know that much about doing it in the beginning. Teeth narrowing is common practice amongst dentists and orthodontists alike and is better than extracting teeth to gain space..It does not damage teeth when done by a trained professional and works great. Your 15 yr old son qualifies for Invisalign teen and teens love not having the ugly old braces on their teeth...

Invisalign is always progressing and doing more and more things that traditional braces can do.  We can expand the arch and uncrowd without IPR but sometimes we will need to do some very minimal IPR to get the perfect result.  When we do slenderize the teeth we take such a small amount off that it is rarely noticeable to someone looking at the teeth.  You can try it w/o IPR and always come back when doing a revision with some minor IPR if needed