Yes in most cases orthodontic treatment using Invisalign® can be completed more quickly Some patients may not be suitable for Invisalign® treatment; your orthodontist will advise you during your initial appointment Yes we usually advise patients to wear a retainer for about a year following completion of treatment. This helps to ensure the teeth do not drift back into their original position Occasionally you may experience a slightly uncomfortable sensation when you change one set of aligners for the next in the series. This feeling disappears, usually after a day or so as your teeth become accustomed to the new aligner.