When selecting an electric toothbrush, the quality of the brush head is crucial, as it is the part that comes into direct contact with the teeth and gums and is subject to the most frequent wear and tear. One of the key criteria for assessing the quality of an electric toothbrush brush head is the rounding rate. According to the national standard GB 39669-2020 "General Technical Requirements for the Safety of Toothbrushes and Oral Care Devices" ... There are specific regulations regarding the rounding rate of toothbrush bristles: for adult electric toothbrushes, the rounding rate must not be less than 50%, while the standard for children’s electric toothbrushes is even higher, requiring a rounding rate of at least 70%.
What is the rounding rate?
The rounding rate refers to the degree of roundness at the tips of an electric toothbrush’s bristles. During the manufacturing process, the sharp edges of the bristles are ground down to create a smooth finish, thereby reducing potential damage to teeth and gums. Although difficult to distinguish with the naked eye, under a microscope, the edges of bristles that have not undergone rounding treatment appear irregular and sharp, making them prone to scratching the soft tissues of the mouth. In contrast, bristles that have undergone rounding treatment appear smooth and rounded, providing significant protection for the teeth.
Why is the rounding rate important?
The roundness of an electric toothbrush head directly affects oral health. The sharper the bristles, the more likely they are to damage the tooth surface and gums; frequent friction during daily brushing can have a negative impact on oral health. In contrast, bristles with a high rounding rate are gentler, do not irritate the gums, and distribute cleaning force evenly, preventing uneven pressure on the tooth surfaces and thereby helping to prevent long-term damage.
Choose an electric toothbrush with a high roundness ratio
According to the national standard GB 39669-2020, it is crucial to choose an electric toothbrush that meets the rounding rate requirements. Electric toothbrushes with a rounding rate of 50% or higher can effectively reduce tooth wear. It is especially important to replace the brush head promptly after three months of use, when wear becomes noticeable. Choosing a brush head with bristles of uniform length that are rounded and soft provides better protection for the tooth surface and reduces damage caused by excessive brushing.
The Relationship Between Brush Head Rounding and Tooth Protection
Rounded bristles not only protect your teeth but also ensure even cleaning pressure. If the bristles are too sharp, prolonged use may cause uneven pressure on the tooth surface, which can lead to thinning of certain teeth or even pitting. Therefore, choosing an electric toothbrush with soft, rounded bristles is especially important for maintaining dental health. Just as with car maintenance—where using high-quality tools to care for the paint job helps preserve the body’s shine and integrity—the higher the quality of an electric toothbrush’s brush head, the better it safeguards your dental health.
Summary
Comply with the national standard for roundnessChoosing an Electric ToothbrushNot only does it protect the soft tissues of the mouth, but it also reduces the risk of tooth wear; for people with sensitive gums in particular, an electric toothbrush with a high roundness ratio can provide a more comfortable experience.
Aiwejay's Electric Toothbrush Bristles: Guaranteed High Circularity
Aiwejay TechnologyUnder the umbrella ofGoldfish Electric ToothbrushManufactured in strict accordance with national standards, we place special emphasis on the design and manufacturing process of the brush heads. We use bristles with a high rounding rate, ensuring that each bristle achieves a rounding rate of over 80%—far exceeding national standards. Whether for adults or children, Aiwejay strives to provide users with a gentler oral care experience. Bristles with a high rounding rate effectively reduce damage to teeth and gums, ensuring that teeth and gums remain healthy even after prolonged use. Choosing an Aiwejay electric toothbrush means choosing meticulous care for your oral health.
