Most patients with primary coccidioidomycosis are asymptomatic, but nonspecific respiratory symptoms resembling those of influenza, acute bronchitis, or, less often, acute pneumonia or pleural effusion sometimes occur.
By using retainers to hold the teeth in their new position for a length of time, the surrounding periodontal fibres are allowed to adapt to changes in the bone which can help minimize any changes to the final tooth position after the completion of orthodontic treatment.
After the braces come off however, there is no such control. The forces of occlusion, wear, and the tongue come back into play. Even if the teeth are held in place with a bonded retainer after appliance removal, the position of the teeth will still change with time. Retainers are the key to preventing tooth movement.