FRIDAY, March 18 (HealthDay News) -- Orthodontic retainers, removable devices used to keep teeth straight, can develop a build-up of potentially harmful microbes if they aren’t properly cleaned, finds a new study. Researchers at the UCL Eastman Dental Institute checked the retainers of a group of study participants and found that about 67 percent had a type of yeast called Candida that can cause fungal infections, while 50 percent had Staphylococcus bacteria, including methicillin-resistant Staphylococcus aureus (MRSA).
