<Table> Fluoride therapy <Tr> <Td_colspan="2"> Fluoride is sold in tablets for cavity prevention . </Td> </Tr> <Tr> <Th_colspan="2"> Clinical data </Th> </Tr> <Tr> <Th> Trade names </Th> <Td> OrthoWash, PerioMed, others </Td> </Tr> <Tr> <Th> AHFS / Drugs.com </Th> <Td> Monograph </Td> </Tr> <Tr> <Th> Routes of administration </Th> <Td> by mouth </Td> </Tr> <Tr> <Th> ATC code </Th> <Td> <Ul> <Li> A12CD (WHO) </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Legal status </Th> </Tr> <Tr> <Th> Legal status </Th> <Td> <Ul> <Li> US: OTC </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr> <Tr> <Th> CAS Number </Th> <Td> <Ul> <Li> 7681 - 49 - 4 </Li> </Ul> </Td> </Tr> <Tr> <Th> ChemSpider </Th> <Td> <Ul> <Li> none </Li> </Ul> </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Fluoride is sold in tablets for cavity prevention . </Td> </Tr>

Name and discuss three methods of administering fluoride therapy