Common problems and maintenance methods of dental handpieces

First: Come on. Maybe you all understand, because there may be doctors, graduate students, and even department directors among you. Maybe you have high dental skills, but you may not understand dental handpiece very well.

First, refuel the handpiece before disinfecting the dental handpiece. In particular, high temperature disinfection can damage the handpiece and you must choose 3 times of pre-vacuum mode for disinfection. After disinfection, it must be dried to prevent the handpiece from rusting. Even though the handpiece manufacturer claims its own handpiece How good. Now everyone may use the four-hole dental handpiece. When refueling, add it to the second large hole. Don’t add too much. 2-3 drops are enough. After refueling, use the air alignment of the three-way spray gun. Blow the oiling hole, don’t get too close. The pressure of the three-purpose gun is high. Let the oil enter to better lubricate the bearing. Remember to add the oil before each disinfection. It is best to add all the dental handpiece once at the end of work. Oil. Let the oil lubricate the bearings better when the handpiece is resting. Don’t be afraid of wasting oil. You know the profit of dentistry better than me. Let’s talk about the oil. I don’t know how you usually add it. I remembered that I repaired the handpiece before. At that time, a doctor asked me, still refueling on my dental handpiece? Where can I refuel?

Second: the use of dental handpiece cleaning lubricant. Don’t confuse it. Dental handpiece oil and cleaning agent are not the same thing. Maybe you all look oily. But the effect is different. The oil is used to lubricate the bearing. Cleaning. Lubricant is used to clean the bearing of the dental handpiece. Every time the teeth are drilled or prepared, a large amount of dentistry will get into the collet of the dental handpiece and even around the bearing. If the dentistry is not cleaned, when the dental handpiece is at high speed These tiny tooth chips will be a fatal wound to the dental handpiece when it is running. When the air pressure of the dental handpiece is 0.2, the speed of the dental handpiece is about 200,000 to 300,000 revolutions per minute. Therefore, the dental handpiece cleaning lubricant is used every time the teeth are drilled. It will be used in the future or after preparing the teeth. Because it is a patient who has to change a dental handpiece. As for the ultrasonic dental handpiece cleaning machine, I do not recommend that you use it. That thing can clean all the lubricating oil in the bearing in your hand. Use as little as possible .

Third: Don’t use inferior burs. Inferior burs can cause great damage to the dental handpiece sandwich. Because they are irregular. The thickness is uneven. The international standard for the outer diameter of the bur is 1.60mm~1.59mm. There may be many doctors who say that the dental handpiece is not clipped. Hold the bur. Can you hold the bur with irregular burs? Or the sandwich has been damaged due to the use of inferior burs. dental handpieces are also considered as precision objects. Matsukaze’s burs are good, and may be a bit more expensive. You have to change the bur frequently. The wear of the bur is definitely not good for the dental handpiece. Because you can’t move your teeth, you will have to unconsciously add force to the dental handpiece. However, the dental handpiece cannot be used. The consequences of the use of force are The needle is deformed. The bearing is easy to break. The cell handpiece collet is scrapped. There is also the problem of loading and unloading the needle of the dental handpiece. When the screw is unloaded, turn the needle to the left, put the needle on the needle, and then turn right, but don’t over turn It’s fine to clamp the bur. As long as the bur does not slip during use. Avoid tightening it too tightly. Too tight the three-lobe spring is easy to break. There are many problems with the pressing type. The bur requires high requirements, so you must use it. International standard burs, otherwise you know the consequences. When loading the burs, try to be a little stronger, and then put the burs until they can’t be put in. The same is true when unloading. The thimble type is relatively rare. I won’t talk about it… However, no matter how good the dental handpiece is, refueling is the key.

Fourth: The dental handpiece is afraid of falling and tripping. I know this. When the dental handpiece is not in use, try to put the original empty needle in. When you buy the dental handpiece, you bring your own. You will not throw away all of them, right? There is also the dental handpiece drilling teeth Or in the process of preparing teeth, do not consciously apply force to the dental handpiece because the drill can’t move. That will cause great damage to the dental handpiece. Especially the ball of the dental handpiece bearing, and secondly, it can cause the bur to deform. If the drill does not move, consider the bur. Should I change it? Don’t work on the handpiece.

Fifth: It is about the driving force of dental handpieces-air. Now there may be more centralized air supply. I won’t say much about the air source. It needs to be drained regularly. About 1-2 times a week. The air coming out of the compressor must be strictly filtered. Otherwise, I won’t say how the impurities in the air damage the ball of the dental handpiece bearing. dental handpieces must run at high speed. Tiny impurities are fatal to the dental handpiece. Damage. The other is the air pressure that the dental handpiece needs during normal use. When high-speed dental handpieces are in normal use, adjust the pressure to about 0.20-0.22. Don’t be too high. If it is too high, it will damage the bearing of the handpiece. Such pressure It is enough to penetrate all the teeth. Don’t increase the pressure by yourself because the drill can’t move. That’s wrong. If you can’t drill, it depends on whether the pressure of the pressure gauge is normal. Most of the reason is because your bur is aging. Change the car. Needle, don’t be reluctant. If you don’t believe it, I can say something alarmist, you adjust the pressure to 0.6. Maybe you step on the switch and the bearing of the handpiece is broken. Maybe you can say Use, but that’s just your opinion, I don’t think.! ~ 0.2 pressure dental handpiece can reach 200-300,000 revolutions. At 0.6, the heat generated by high-speed operation is enough to deform the ball. You might say the handpiece again The spray can cool down. Please. That is to cool the bur. I am afraid that the bur will cause heat to burn the pulp or other tissues. Also, it will also atomize the ground tooth dust. Don’t fly around like dust. Let’s get down to the truth. The pressure of other high-speed dental handpieces is about the same, and the high is a little higher.. .25 is the most. Then let’s talk about the low-speed. The pressure of the low-speed dental handpiece is generally adjusted to about 0.3. If you don’t understand the teeth, think about the bur first. Then consider other issues..

However, what is also added is that for the dental handpiece sandwich, more oil should be put into the hole of the bur, so that a certain amount of lubrication and protection will be provided for the spiral pin-unloading type and the pressing type dental handpiece sandwich. Regarding the intake pressure, for domestic and Japanese dental handpieces, the intake pressure should be kept at about 0.20-0.22, and should not exceed 0.25 as much as possible, otherwise it will cause great damage to the bearing. For dental handpieces of European and American standards (KaVo, W&H, Sirona…), the air inlet pressure should be kept below 0.28 and it should be easy to use, and should not exceed 0.32 as much as possible, otherwise it will cause great damage to the bearing. The compressor needs to be cleaned, filtered and drained frequently, because there will always be water vapor in the air. Too much water vapor means that the compressor needs to be drained, otherwise the air will contain water, which will damage the bearings!

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