At the moment, there is no compelling evidence that orthodontic treatment should be pursued as a cure for bruxism.
In some patients with a narrow airway, arch expansion which happens naturally with most forms of orthodontic treatment may improve bruxism related to airway resistance syndrome. However, you will need a sleep test to confirm if this is the condition you are facing.
Some patients are just programmed for bruxism, no matter what treatment is pursued. Preventing damage to the teeth by wearing a bite guard or retainers at night is still the most common and effective way to manage chronic bruxism.
