If you have not been wearing your retainers for any reason, your teeth may have moved. There may be a chance of recovering the situation by forcing the retainers onto your teeth, wearing them full time for 48h+ to try to move the teeth back into alignment. The teeth may become painful as they move, take your normal painkillers regularly to help during this difficult period. Make sure you check your progress with us as soon as you can. If your teeth are moving despite wearing retainers as advised, please wear them full time and call us as soon as possible. Growth of the wisdom teeth can cause sudden changes and make it difficult to wear your retainers. If they don't fit at all, it may be too late to retrieve the situation easily.