I just started my Invisalign treatment 2 days ago so am still on Tray 1. My dentist told me that eventually I will need IPR to introduce more space into my mouth for the teeth to straighten properly. However, I have been reading online and a few people have said that the IPR led to increased cavities and other issues once they completed their Invisalign treatment. How was IPR for anyone else? Thanks in advance for your input! I am getting very nervous about IPR and wondering if possible to complete Invisalign without it!