SECT. XXIX.—PRESERVATIVES OF THE TEETH.
The teeth will not decay if the following things be attended to: in the first place, to avoid indigestion, and frequent repetitions of emetics. Guard against such food as is hurtful to the teeth, as dried figs, honey boiled, so as to become very hard, dates which are difficult to rub down, and all glutinous substances; likewise such things as are difficult to break, and may thereby loosen the teeth; in like manner also, such substances as set the teeth on edge, and everything which is cold and putrid. The teeth also ought to be cleaned after supper.
Commentary. This Section is mostly taken from Oribasius. (Synops. v, 25.)
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.)