Rhases gives similar directions. He forbids emetics, and recommends
attention to keeping the teeth clean. He praises the following
dentifrice: Of hartshorn, of the seeds of tamarisk, of cyperus, of
spikenard, of each ℥j, of the salt of gem ʒij, to be pulverised, and the
teeth rubbed with it. (Ad Mansor. iv, 21.)