Brush Biopsy
Throughout the medical field, a biopsy is simply the removal of a tissue sample to determine if it is diseased. In dentistry, teeth and gums are sent for biopsy under certain, necessary circumstances. The role of a biopsy in the dental industry is to diagnose oral cancer (obviously something that we all care a lot about). In these instances, a brush biopsy is used to identify oral lesions that warrant further attention. There is no pain, no shots involved, and the results are available in about two weeks.
If you have unexplained lesions or discolored (including white) spots in your mouth, they need to be examined by a dentist. They may or may not be cancerous, but they need medical attention nonetheless.