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.
A missed crack in the root of your tooth is one of the root canal complications that can lead to bacterial growth and the possibility of further treatment. If your dentist doesn't notice a small crack in the root of your tooth, it leaves the area exposed to the reintroduction of bacteria in the area.