Miswak, also known as siwak, is a natural teeth cleaning stick made from the Salvadora persica tree, commonly referred to as the "toothbrush tree." Traditionally used for oral hygiene in many parts of the world, especially in the Middle East, Africa, and South Asia, the miswak has gained recognition for its medicinal properties and effectiveness in promoting dental health.

The miswak stick contains natural antiseptic, antibacterial, and astringent properties, which help in reducing plaque, combating oral bacteria, and preventing gum diseases. Its fibrous nature provides a mechanical cleansing effect similar to modern toothbrush bristles, effectively removing food particles and plaque from teeth surfaces. The miswak also contains natural fluoride, which strengthens tooth enamel and prevents cavities.

To use the miswak, a small portion of the stick is chewed until it forms bristles, which are then used to brush the teeth. It is often moistened with water or rosewater for added freshness. Unlike conventional toothbrushes, the miswak is biodegradable and does not require toothpaste, making it an eco-friendly and convenient option for maintaining oral hygiene.

The miswak is valued for its portability, simplicity, and effectiveness, making it a sustainable alternative to synthetic oral care products. Its longstanding use and endorsement by various health organizations underscore its benefits in maintaining oral health naturally.