1 Plasma donors may donate as often as every 28 days. 2  Platelets donors may donate as frequently as every eight days, and up to 24 times in a 12-month period. 3  Double Red Cell donors maybe donate as often as every 168 days.
In some cases, perfectly straight teeth can become crooked with age, as the structure of your mouth changes, or due to tooth loss and movement of the remaining teeth. Teeth straightening can be achieved by a variety of different cosmetic dental techniques.
Time-lapse video shows the incredible impact an orthodontic device has on crooked teeth over 18 months. Video reveals how an 11-year-old's crooked teeth were fixed in 18-months. Shows how teeth are moved due to the pressure exerted by braces.