IPR sometimes is necessary to make space for the crowded teeth and to improve the bite. From your photos, I do not see that you have space issues. The gaps are large. IPR will not make the teeth to move faster. The trays should not feel loose at all during treatment. Should fit like a glove...
N. Summer Lerch, DDS, FAGD - Account Suspended says:
HI There! Thank you for the photos! They really help. I can tell that your orthodontist has an approach that is holistic, in other words he/she is just not treating a crooked lower tooth. You have other orthodontic concerns in your smile/occlusal design. Why don't you...