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.
Thank you for your question. I am sorry you are having a problem with the tractor. The retainer fits into the slot around the axle. Once you have the retainer started, use a pair of pliers to get it to slip the rest of the way on. I have found a video that shows how to remove and install a wheel. Click.