With Invisalign®, the trays are smooth and clear appearing almost invisible when being worn. They're also very comfortable, with no sharp edges or wires. The Invisalign® trays can also be removed, making it much easier to keep teeth and gums clean during treatment and also eliminating food restrictions. For the best results, the aligners should only be removed when they are being changed, during brushing and flossing, or when certain foods are eaten. Because there are no wires to be continually readjusted, patients typically require fewer office visits - usually, just one every six weeks or so - and treatment with Invisalign® is usually much faster compared to traditional orthodontic treatments.