How does dental drill works?

Answer 1

Well, there is a motor inside that pumps out high- pressure air to a gear. thus, the gear moves at around 40,000 rpm!!! Imagine how much air-pressure is acting upon the gear!!! Then when the gear moves , the drill bit also moves. the fast rotations let the dentist clean the teeth.

Hope this helps!!

Answer #2- The ideas are in the right direction, but the details are wrong. The turbine in a high speed drill is driven by high pressure water. The water is cooled to provide a slight anesthetic effect.

The drill bits are usually tungsten carbide.

The dentist will still use the older belt-driven drill on occasions when he wishes to provide a good bedding in the excavation for the cement and amalgam to adhere.

Hope this satisfies your question!

Number 1 you are on the correct track, number 2 you are WAY OFF BASE!!!

I am a 19yr veteran repair guy and have been trained by ALL of the HP manuf. around the world. First there are 2 types of drills... high speed and slow speed. Answer #1 was referring to the slow speed type. Air runs through a valve body and pushes a series of carbon blades/vanes to drive the assy. These air "motors" rotate approximately 20,000 rpm. Some have transmission type assy's built into them to reduce the speed if required. A high speed drill runs between 300,000 and 550,000 rpm. These are NOT driven by water. They have a miniature air driven turbine assy in the head/top of the drill and are driven by directing air at the impeller/blade assy on the turbine. Water is used externally only to cool the surface being drilled upon. Water never is run through the drive/turbine assy. Also, the so called drill bits(actually called burs) are not all carbide. All have a stainless shank and come with a variety of tips to accommodate different procedures.

Answer 2

Tooth enamel is pretty hard, but there are a couple of ways to get through it. A rotating bit made of hardened steel or an exotic alloy (and possibly coated with diamond) will work. It could be driven by a high speed air turbine built into a handle (and you know what that sounds like), or by the old motor and belt system on the articulated arm with the drill on the end (really old school). The bit and air turbine are the most common. There is also a technique that uses something like "sand blasting" where a fine abrasive material is "blown" with compressed air against the "spot" through a tiny ceramic nozzle on the end of a hose (after a lot of "prep work" to isolate that spot so the "blasting" won't damage the enamel on other teeth). Look below for a link.

Answer 3

There are mainly two types of dental drills (or high speed hand pieces). The most common one is the air driven drill. Compressed air is driven into the hand piece which...for a lack of a better term...spins a fan which in turn, spins the dental bur. Drills spin at over 300,000+ rpm. The second type are the electric drill where power is generated by electrical current. That too, spins over 300,000+.

Answer 4

it does by moving very fast

sorry, about the grammer and info.... I'm only in 1st grade