Please tell me how long it takes for to fix a crossbite with braces?

Crossbites: That depends upon the degree of crossbite, your age and stage of development, the rest of your occlusion (bite), the methods used, etc. If you go to an orthodontist for a consultation, he\she can give you an approximate time frame for treatment.

Dental or skeletal: Dental crossbones can usually be addressed in a short period of time. Skeletal crossbones may take longer and, as a non- growing adult, require surgery to assist the expansion. Please, as dr. Sandler said, see an orthodontic specialist for a qualified opinion. Once you have all the facts you can make an informed decision.

Depends: There is no exact time associated with correcting a cross bite-- there are just too many other variables involved. You should ask your orthodontist directly as they know your case.