What is the best toothbrush to buy? This is a question that plagues many people who care about their oral health. A small toothbrush is related to the oral health of yourself and even your whole family (some housewives may help the whole family choose a toothbrush), so something like buying a toothbrush may seem like a small thing, but it is not simple. Everyone may have a different perspective on toothbrushes and brushing, and there are some mainstream questions that have developed in communities and forums. Below, we will give more scientific answers to a few of the more common questions. Is a soft-bristled toothbrush better than a hard-bristled toothbrush? A toothbrush with too soft bristles tends not to get clean, and it tends not to clean teeth effectively with residual bacteria. If the bristles are too hard, it is easy to hurt the teeth and gums, resulting in bleeding gums and damaged teeth. Brush bristles should be moderately hard or soft, or slightly soft (not too soft). The current bristles are mostly made of nylon filaments. Specifically, there are two types – ordinary silk and Dupont silk. Dupont wire is more elastic and does not fall easily. Is a curved toothbrush head better for cleaning teeth? With the development of society, there are more and more types and shapes of toothbrushes. There are square and diamond-shaped and oval-shaped brush heads, and wavy, flat and V-shaped upper edges of bristles. Some people think that curved toothbrushes are more effective in cleaning teeth, but in fact, no matter the shape of the brush head and bristles or even the shape of the brush handle, it actually has no major effect on the effectiveness of brushing teeth. Is it more effective to brush teeth with a larger head area? Some people feel that a larger brush head will reduce the number of brushing strokes and allow them to reach all corners of the teeth. Some people feel that a smaller brush head ensures a more flexible rotation of the toothbrush in the mouth and therefore more effective cleaning. In fact, the size of the brush head depends on each person’s situation, taking into account the size of the mouth, the degree of mouth opening and personal habits. There is no uniform standard. Adult toothbrushes should be: brush head length of about 2.54-3.18 cm, width of about 0.79-0.95 cm; bristles 2-4 rows, each row of 5-12 bundles. However, adults can also choose a children’s toothbrush with a brush head 2.3 cm long and 0.8 cm wide.