市场上的牙刷品种、牌号很多,究竟选择怎样的牙刷才比较适宜呢? (1)牙刷头大小:根据美国牙科协会的规定,牙刷头的长度应为2.5—3厘米,宽度为0.8—1厘米,有2—4排刷毛,每排5—12束刷毛,牙刷头前端应为圆钝形。 (2)刷毛硬度:一般可分为软性、中性、硬性三种,使用中性硬度刷毛的牙刷比较适合。购买时可用手指压一下刷毛,如有刺痛感表示太硬,不宜选用。目前市售牙刷的刷毛多为尼龙刷毛,其弹性、均匀性及硬度都 Toothbrush varieties on the market, many brands, what kind of toothbrush to choose exactly what is more appropriate? (1) Toothbrush head size: According to the provisions of the American Dental Association, the toothbrush head length should be 2.5-3 cm, a width of 0.8-1 cm , There are 2-4 rows of bristles, each row of 5-12 bristles, toothbrush head should be blunt-ended front. (2) bristle hardness: Generally can be divided into soft, neutral, hard three, the use of toothbrush neutral hardness bristles more suitable. Buy finger pressure when buying bristles, tingling that if too hard, should not be used. Toothbrush currently available on the market mostly nylon bristles, its flexibility, uniformity and hardness are