5 Steps to Choose the Perfect Toothbrush

1. Small and Narrow Brush Head
   A small and narrow brush head allows for flexible movement inside the mouth, reaching all areas of the teeth (especially the molars near the cheeks), leaving no dead corners.

2. Moderately Soft Bristles
   Using a toothbrush with soft bristles can make it difficult to control the pressure while brushing. Brushing too gently may fail to remove food residue and bacteria effectively, while applying too much force could damage the gums and shorten the toothbrush's lifespan.
   On the other hand, toothbrushes with hard bristles offer better cleaning efficiency but can cause greater wear and tear on the teeth. Therefore, it is recommended to choose a toothbrush with medium bristle hardness.

3. Polished Bristle Tips
   If the bristle tips are not smoothed after being cut, their sharp edges may cause injuries. Toothbrushes with rounded bristle tips are less likely to cause harm and provide better gum protection.

4. Well-Arranged Bristles
   An ideal bristle arrangement should include 2 to 4 rows, with each row containing 5 to 12 tufts of bristles. There should be proper spacing between each tuft. This design not only helps effectively remove dental plaque but also makes it easier to clean the toothbrush itself.

5. Non-Slip Handle Design
   A good toothbrush should have a handle that is comfortable to hold and equipped with a non-slip design. Additionally, the toothbrush handle should match the shape of the hand. Currently, there are straight-handle and angled-handle designs available on the market.
   Clinical studies show that straight handles make it harder to control the pressure during brushing, whereas angled handles are better at reaching areas where plaque accumulates. Generally, the ideal angle between the handle and the brush head is between 17 to 20 degrees.

    Resources：https://zhuanlan.zhihu.com/p/412279529