Occasionally we will get an aligner that is sharper than it should be. It is simple to fix. Just bring it back to your dentist and ask them to polish off the sharp are. If this happens in futrue aligners make sure you tell your dentist and he can smooth them all out. If you can not get back to your dentist then very gently smooth the area with a fine nail file being careful not to crack or split the aligner.
In my opinion, if you are wearing your aligner at least 22 hr per day than you shoul dbe able to change your aligners every 2wks. In fact, that is my protocol with all my patients. If I have a patient that is not wearing the aligners as often as they should then I may require them to wear them for 2.5 to 3 wks at a time. Even though you wear your aligner for 2.5 wks does not mean that you will not need refinement. It just all depends on how well your teeeth respond to treatment.
It looks like you would be a great case for Invisalign! Although you have a lot of crowding the aligners will be able to slowly fix your crowding. Before you know it you will have that smile you've always wanted.
I always tell my patients that there will most likely be a few more aligners after the first phase (which is refinement) This is Normal. I find that most people are relieved to hear that because they have somewhat of a guarantee that their teeth will straighten to their satisfaction (assumming they are compliant). I would say about 80% of my cases do requitre at least one phase of refinement.
You are definitely a good candidate for Invisalign. Your crowded lower teeth can definitly be straightened with Invisalgn and your overbite will greatly improve.
