The Miswaak is a natural tool for brushing the teeth. It is taken from the roots and branches of particular desert trees. It differs from one region to another, but in Arabia and Asia it is taken from the Arak tree. This is the most famous variety, and is the kind that was used by the Prophet Muhammad (peace be upon him).

Its scientific name is Salvadora Persica. It is a tree that grows in hot equatorial countries, especially in desert valleys. It is widespread in the South of Saudi Arabia, Yemen, Sudan, Egypt, and elsewhere. 

Salvador Persica is an upright evergreen small tree or shrub, seldom more than one foot in diameter, reaching a maximum height of three meters. The leaves are small, oval, thick and succulent with a strong smell of cress or mustard.
The Miswaak is also obtained from other trees. In Africa, for example, it is cut from Lime and Orange trees, and in America some are cut from the Senna tree.

As the Arak tree is so well-known, and as it was the kind that the Prophet (pbuh) used, it has been scientifically studied. The following summarize the various discoveries regarding Miswaak.

Health effects of Miswaak:
Physically, the Miswaak is a natural toothbrush. It is composed of a compact group of minute natural fibers that perform exactly the same function as a normal toothbrush except that it is made of natural rather than plastic fibers. For this reason it may be more gentle on the gums.

Miswaak's natural toothpaste is made up of many substances that are important for cleaning teeth. Many researchers have studied the Miswaak in depth, and have proven that Miswaak contains over ten different natural chemical compounds considered essential for good oral and dental hygiene.

They are: fluoride, silica, tannic acid, resins, alkaloids (salvadorine), volatile oils (sinigrin), sulfur vitamin C, sodium bicarbonate, chlorides, calcium, benzylisothiocyanate (BIT), and others including salicylic acids, sterols, trimethylamine, saponins, flavenoids.

Some of these components are stain removers and teeth whiteners, some protect teeth against caries, some are bactericidal and antiseptic, some help in healing and to repair tissues, some promote remineralization (building) of tooth enamel, and some give the pleasant taste and smell. 
    
Cytotoxicity:
Results of cytotoxictests showed no cytotoxic (cell damaging) effects from using freshly cut Miswaak. However, the same plant used 24 hours after cutting did contain harmful components. Based on these findings, researchers recommend cutting the used portion of the Miswaak after it has been used for a day and preparing a fresh part.

Scientific comparison between Miswaak and toothbrushes:
A clinical trial study on Ethiopian schoolchildren, comparing Miswaak with the conventional toothbrush, found Miswaak to be as effective as the toothbrush in removing oral deposits. The study also found instruction and supervision to be important since the children in the sample were not familiar with techniques for using Miswaak.

How to use Miswaak:
The method of preparing a Miswaak for use is to cut a branch or root of the Arak tree into pieces between 10 cm and 20cm in length, and between 4mm and 14mm in diameter. Occasionally some are thicker than this.

Fresh Miswaak is brown in color, with a hot, pleasant taste. People usually strip off some of the Miswaak's thin bark from one end, then chew that end a little to separate the fibers so that they become like the fibers of a normal toothbrush. They then use it to brush their teeth.

Brushing technique:
The techniques employed for removing plaque mechanically are similar to that for the toothbrush and the chewing stick; i.e., vertical and horizontal brushing. The cleaning movement should always be directed away from the gingival margin of the teeth (away from the gums) on both the buccal (outer cheek) and lingual (inner cheek) surfaces.

The Prophet Muhammad (pbuh) recommended Muslims to clean their teeth using a Miswaak every day 

Article compiled from www.islamweb.net