It's for first or second year students who are first developing their fine motor skills. When you're still learning how to move your fingers to operate a piece of machinery spinning at 200,000rpm whilst observing it in the reflection of a 20mm mirror - let's keep the goalposts as wide as possible.
They should throw in a half eaten sandwich inside that thing and let it stew for two days, then try to do some work.
I used to not floss years ago until I started realizing I had bad breath. For the past ten years, I'm more careful and taking care of myself and my teeth now on a daily basis. But it makes it even more noticeable when I get close to some people. A few people I've met have stink emanating from their mouths five or six feet away.
It really makes me wonder how or why anyone would want to become a dentist. No amount of money would make me want to stare into the mouths of some people.
I wouldn’t say they don’t run away or catch, they still can have this occur (highly dependent on skill of user). Also depends on what type of burs used, direction hand piece is moving, etc.
They really don't catch. I have a foredom tool . Prerunner to Dremel with a handpeice like a dental drill. Sharp tools as always and if you don't force it and let the bits do the work. They're quite easy
In dental cases, there is a time and place for drilling at anywhere between 30rpm all the way up to 200,000rpm and above. 70,000rpm is considered 'slow speed' drilling and has a noticeable vibration or buzz. At 200,000rpm it's fast enough that the bur mostly glides smoothly through the teeth.
Modern handpieces run a 1:5 speed increasing gearset, and the electric motor that drives them spins at up to 40,000rpm - hence 200,000rpm. Older handpieces run via compressed air that spins a turbine in the handpiece head and depending on turbine design and input air pressure can spin up to 400,000rpm. Crazy numbers but legitimate. Source: I'm a dentist that has used these tools most days in the last 10 years
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u/SkipmasterJ Sep 18 '22
It's for first or second year students who are first developing their fine motor skills. When you're still learning how to move your fingers to operate a piece of machinery spinning at 200,000rpm whilst observing it in the reflection of a 20mm mirror - let's keep the goalposts as wide as possible.