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I have treated many single arch cases (only lowers or Only uppers). The bite needs to be ideal to allow for single arch invisalign therapy. In addition, the opposite arch should have decent alignment to begin with. An Invislaign Consult exam is all that is needed to see if you are a candidate.
While it is technically possible to treat only the lower arch with Invisalign, generally it's not recommended except in specific cases. For example, if a patient has a fixed retainer on one arch, but a removable retainer on the other arch, but did not wear it, those teeth would shift. In that case, you may want to just treat the arch that has relapsed to that it fits back with the other arch that is still retained. Our upper and lower teeth fit together like a puzzle so that our bite is even on all teeth. So, if you treat only one arch, it could end up that that arch no longer fits the bite of the opposite arch. A good majority of cases will need both arches to be treated.
Donna, thank you for a wonderful question. I wish you would provide a picture of the crowding.If it is a slight crowding, yes you can. In case it is a moderate to severe crowding I would not advise doing only lower teeth. Doctor, who will be doing your treatment, will have the same overhead cost and will need to spend the same amount of time whether he will treat one arch or both. Besides, the best results can be achieved treating both arches at the same time.
Invisalign just for bottom teeth is possible but not recommended. Teeth, both upper and lower should be in harmony with each other so they are stable and don't relapse and cause an imbalance. Since overcrowded teeth also affect the bite its important that you get the treatment for both upper and lower teeth.Theres also no difference in the cost if you only get the lower teeth so may as well get both arches. The cost for Invisalign at our practice is $4000.Hope this answers your question. All the best. Warm Regards.
We usually do not isolate treatment to onearch only. The bite will change periodically throughout treatment and if boththe upper and lower aligners are not being worn, it is possible that the bitewill be affected in an adverse way.