Chew sticks are small twigs or roots used to clean teeth by fraying one end into soft bristles and rubbing them against the teeth and gums. They are one of the oldest oral hygiene tools in human history, still used daily by hundreds of millions of people across Africa, the Middle East, and South Asia. The term “chew stick” can also refer to wooden chews made for dogs or silicone oral motor tools designed for sensory therapy, but the traditional dental chew stick is by far the most common meaning.
How Traditional Chew Sticks Work
A traditional chew stick is a pencil-sized piece of twig or root, typically 15 to 20 centimeters long. To use one, you peel back about a centimeter of bark from one end, then chew on the exposed wood until the fibers separate into a small brush-like tuft. This frayed end becomes your bristle head. You hold the stick like a pencil and use the bristles to scrub along the surfaces of your teeth and gumline, much like a manual toothbrush.
The cleaning action is partly mechanical, the bristles physically sweeping away plaque, and partly chemical. The plants used for chew sticks release compounds as you chew them. Salvadora persica, the most widely studied species (commonly called arak or miswak), contains natural fluoride, vitamin C, sulfur compounds, and several substances with antimicrobial properties. Chewing the stick also triggers changes in saliva: calcium and chloride levels increase immediately after use, which may help remineralize tooth enamel.
Common Plant Species
The species used depends on the region. In the Middle East, the miswak from the Salvadora persica tree dominates. Its roots have a mild, slightly peppery flavor and contain the richest studied mix of dental compounds. In South Asia, neem (Azadirachta indica) twigs are widely used and have demonstrated antimicrobial effects against plaque-forming bacteria. Across sub-Saharan Africa, dozens of local tree species serve the same purpose, selected over generations for their fibrous texture, taste, and medicinal properties.
What these plants share is a fibrous wood that frays cleanly rather than splintering, plus naturally occurring chemicals that fight the bacteria responsible for cavities and gum disease. Research on communities in Uganda has confirmed that many traditionally chosen chewing-stick plants do contain substances with measurable activity against streptococcal bacteria, the primary culprits in plaque formation.
How They Compare to a Toothbrush
Clinical testing has directly compared miswak sticks to standard manual toothbrushes for plaque removal. In a controlled study published in the Saudi Dental Journal, researchers measured the percentage of plaque remaining on tooth surfaces after 30, 60, and 120 seconds of cleaning. After two minutes, miswak users had about 6.5 to 6.9 percent plaque remaining on front and back teeth, while toothbrush users had 6.6 to 8.6 percent. The differences were not statistically significant at any time interval.
A separate clinical comparison of habitual miswak users versus habitual toothbrush users found similar plaque levels in both groups (31.2% versus 27.4% on front tooth surfaces, a gap that was also not statistically significant). Some research from Sudan has even suggested that miswak users had slightly better periodontal health than toothbrush users, and that using miswak five times daily significantly reduced both plaque and gingivitis compared to conventional brushing.
The World Health Organization recommends and encourages miswak use as an inexpensive and effective oral hygiene tool in areas where it is customary.
Risks of Improper Use
Chew sticks are not risk-free. Studies have found that frequent users, particularly those using miswak five times a day or more, show higher levels of gum recession and tooth wear. The likely explanation is technique: using too much pressure, brushing too aggressively, or using a stick with an overly stiff or worn bristle end can damage both enamel and gum tissue over time. These problems tend to appear in people who were never taught proper technique, reinforcing that how you use the stick matters as much as the stick itself.
To minimize damage, replace the frayed tip regularly by cutting it off and re-chewing a fresh section. Avoid scrubbing horizontally with heavy pressure, especially near the gumline. Gentle, short strokes along each tooth surface, similar to the technique recommended for a manual toothbrush, reduce the risk of recession.
Dog Chew Sticks
The term “chew stick” also applies to wooden or compressed treats designed for dogs. These serve a different purpose: satisfying a dog’s natural urge to gnaw while helping scrape plaque and tartar from their teeth. The key concern with dog chew sticks is splintering. Softer woods can fracture into sharp shards that pose a choking or intestinal injury risk.
Olive wood chew sticks have gained popularity because the dense grain doesn’t splinter in the same way. Instead of breaking into dangerous fragments, olive wood gradually sheds tiny soft fibers that are safe to swallow. The wood also has mild natural antibacterial properties. Other marketed options include coffee wood and yak milk chews, though olive wood is the most commonly recommended for dogs that are aggressive chewers. Regardless of material, you should always supervise your dog and discard any chew stick once it’s worn small enough to swallow whole.
Sensory Chew Tools
A third type of “chew stick” is the silicone oral motor chew tool used in occupational therapy, particularly for children and adults with sensory processing differences, autism, ADHD, or anxiety. These are not made from wood. They are food-grade silicone devices designed to provide safe, controlled chewing input to the jaw muscles.
Sensory chew tools come in a range of shapes and textures: smooth, bumped, ribbed, or hollow. Some are shaped like letters or animals to make them engaging for children. The therapeutic idea is that rhythmic chewing provides proprioceptive input (deep pressure feedback to the jaw) that can help with self-regulation, focus, and calming. Therapists also use them to build jaw strength, endurance, and coordination in people with oral motor delays. They are sized so the chewing surface reaches the back molars, where the jaw generates the most force and where sensory input is most effective.