Published online by Cambridge University Press: 24 September 2009
The siwāk or miswāk (pi. masāwīk) is often mentioned as a symbol for the emphasis given in medieval Islam to dental health. Although not mentioned in the Qur'ān—the prime source of legitimacy in Islam—the siwāk gained popularity through being attributed to the daily practice of the Prophet Muhammad whose advanced understanding of preventive dentistry is lauded as being only part of his general concern with preventive medicine. Even on his death bed the Prophet is said not to have given up the use of the siwāk, since he always ordered Muslims to “purify your mouths for they are the channels through which utterances of praise to God (subḥāna Allāh) travel”. The word siwāk derives from the Arabic root swk, which indicates rubbing for the purpose of cleaning. Hence siwāk or miswāk are the names of the wooden instrument which has been used as a “tooth-stick” (Zahnstocher), or as an early form of the toothbrush, to clean the teeth and deodorize the mouth. The siwak is a wooden stick about 8 inches long and as wide as a finger. The edge is usually chewed so that the fibres separate to become like a brush. In contemporary Islamic ethics, of which the fatāwā literature (legal responsa) is only one example, the siwāk has regained recognition and is often praised as the preferred means for dental care.
I am grateful to Prof. J. Sadan of the Department of Arabic at Tel Aviv University for his valuable references.