What is the best way to treat crossbites?

Maxillary expansion: Use a hyrax or hass expander.

See an orthodontist: Depending upon the type and degree of your crossbite my best advice is to consult an orthodontist.

What type?: Dental, skeletal, or both? Anterior or posterior? Single tooth or segmental? Due to tipped teeth or boney aberrations? Is there crowding, spacing, rotations? When there is one anomaly there are often multiple anomalies. Please see a qualified Orthodontic Specialist for examination (often free) and discussion as to your individual needs. You'll be glad you did.

Braces: An orthodontist can answer this question for you after evaluating your mouth and your radiographs (x-rays). Some cross bites can be corrected using braces; other cross bites need to be corrected with both orthodontics and jaw surgery.

X Bites: With Invisalign or Standard orthodontics depending upon severity of the cross bite. Time to have a consultation with your orthodontist :)

Few ways: Braces and invisalign will work for minor crossbites, but oral surgery may need to be used in cases of severe crossbites, particularly if the malocclusion has gotten worse with age.

Age Dependent: There are many different ways to treat a crossbite. It depends on the age of the patient, the severity, and where it is located. Best bet is to consult with a local orthodontist.