Help I am really worried that my dd is going through hell with twin blocks and that it's maybe not necessary. Are twin blocks used purely as a cosmetic treatment to improve profile? My dentist referred us to nhs as she has overbite of 10mm but her profile looked ok before the twin blocks were in place. I'm just worried that we've put her through an ordeal purely for a minor cosmetic improvement. My main concern is that she will loose confidence as her speech is so impaired - it is only day 3 so I am hoping it gets better. Is there a medical reason for jaw to be aligned. Her overbite up til now has not caused her any problems. Any advice please. Also how long will she need to wear the twin block? Dentist has been very vague on this point. My dd is coping with her brace quite well considering she can't eat, sleep or talk well but I don't think either of us will cope if it goes on for too long!