Electric toothbrushes are divided into two types: plug-in power supply and battery-driven. Compared with the traditional manual toothbrush, the electric toothbrush is driven by electric power, and the brush head moves at a speed of several thousand times or even tens of thousands of times per minute. The efficiency is much higher than that of the manual toothbrush, but it also has higher requirements on the bristles. Damage to the gums during brushing
Electric toothbrushes are divided into many types according to the improvement of technology. Generally, the teeth are cleaned by vibration rotation, and some high-grade ultrasonic instruments are used to clean teeth by pulse and water spray. Nowadays, the ordinary electric toothbrush that sells dozens of yuan on the market is simply vibration and rotation. Its frequency and strength are very large and fixed. Ultrasonic toothbrushes generally do not cause damage to teeth and gums, and can clean teeth very clean, but expensive
Six advantages
1. Cleaning ability---It is difficult to completely remove plaque from traditional toothbrushes, and the method of brushing teeth is not appropriate, so the cleaning effect of brushing teeth is greatly reduced. Experiments have shown that electric toothbrushes remove 38% more plaque than manual toothbrushes, and its cleaning ability has been unanimously recognized by dental experts.
2, comfortable feeling - incorrect brushing method makes our gums often suffer. The slight vibration generated by the high-speed rotation of the electric toothbrush not only promotes the blood circulation of the oral cavity, but also has an unexpected massage effect on the gum tissue, and this comfortable feeling can only be known after personal experience.
3, fun feelings - this is not only suitable for many children who do not like to brush their teeth, but also for adults. Since the electric toothbrush is much larger in volume than the conventional toothbrush, there is a lot of effort in appearance. Watching a "sports car" move back and forth in front of his mouth, brushing his teeth naturally becomes a pleasure.
4, reduce damage - when using ordinary toothbrushes to brush your teeth, the strength of the use of the user's own control, sometimes inevitably too much brushing force, or the use of incorrect saw-type cross-brushing method, these will cause damage to the teeth and gums. Experiments have shown that electric toothbrush can reduce the brushing force by about 60%, which reduces the frequency of gingivitis and gum bleeding by 62%, making the brushing process safer and more effective.
5, whitening and beautiful - electric toothbrush can effectively reduce tooth stains caused by drinking tea, coffee and bad oral conditions, restore the original color of the teeth. Moreover, this adjustment is not immediately effective, but is gradually carried out with daily brushing, and does not cause any damage to the teeth themselves.
6, easy to use - everyone before the break or get up in the morning, there will be not much spirit and strength, so can not guarantee the time of brushing and brushing movement specifications, the health care effect on the teeth will naturally be greatly reduced. The electric toothbrush can solve this problem well. The automatic rotating brush head is ergonomically designed to ensure the efficiency and convenience of brushing. It's so convenient to use, it's easy to brush your teeth, and it's easy to cultivate our good habits.
Disadvantage
The bristles of the electric toothbrush are rotated, so it is necessary to stay on each tooth surface for a period of time, and it is necessary to take care of three tooth surfaces to achieve the purpose of cleaning the teeth, which is time consuming. Therefore, the use of an electric toothbrush requires sufficient patience to really clean the teeth. If you just put the toothbrush into your mouth and move it up and down without synchronization, you can't completely clean the bacteria in the special parts such as the pits, gingival sulcus and interdental joints of the teeth, which can also cause dental disease. Proper use of electric toothbrush does have the effect of removing plaque, preventing caries and periodontitis, but these effects are no different from ordinary toothbrushes. Electric toothbrushes only change the way people brush their teeth, and they can't completely replace the role of cleaning teeth. However, many people brush their teeth manually, due to improper methods, brushing force is too large, easy to cause unnecessary damage to teeth and gums, and electric toothbrush can reduce this damage, massage the gums. However, if the electric toothbrush is used in the wrong way, it will cause damage to the teeth. Usually, ordinary toothbrushes are actively brushed up and down, that is, vertical brushes. The vibration frequency and strength of the electric toothbrush are relatively fixed. When rotating, the surface of the tooth is similar to the horizontal brush, which may cause certain wear on the teeth, which may cause periodontitis. If the teeth themselves are not very good, such as gingivitis and periodontitis, it is best not to choose an electric toothbrush.
The frequency and strength of the electric toothbrush are fixed. Because the child can not grasp the proper use method at one time, it is easy to damage the young gums, causing redness and swelling of the gums, and also causing severe wear and tear of the teeth. Zhou Yan, causing the teeth to fall off. Children using electric toothbrushes have many drawbacks and should be used with caution!
Cable Roller
Features
1. In the cable laying process, it can support the cable and change the sliding friction into rolling friction between cable and support, which means it can reduce pulling force.
2. Straight pulling roller is used in the straight line segment of cable laying. Generally put one roller every 2-3 meter.
3, Corner pulling roller is used in the turning point of cable laying. The amount of corner pulling roller in the turning point is determined by the side pressure and cable bending radius.
Usually used in laying path of cable tray, well head, upper and down slope and control cable.
Notes: When operating, the roller should be fixed in ground or other supports.
Cable Roller,Corner Roller,Hoop Rollers,Cable Guide Rollers
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