controlling of a handpieces of dentistry

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#1
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hi....
please share your ideas about this:
if i have a handpieces of dentistry like this picture....
i want it to work on teeth (and Tooth decay) regularly, but if it reach the gingival, it has to stop.
please help to find the best way to implementation of this idea....what r u thinking?...what sensor do i need?..and what should i do?

.................
Regards

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:shock: :? :roll: :?:

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You could use a microphone.

When the patient screams loudly enough it stops the drill.

David.

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LMAO.

Best topic ever.

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Maybe, controlling the different forces that made the piece.
When the piece works on the tooth, use a specified force
When it reaches the gingival, the force is another (less force)
This can be done by controlling the current.
But if the piece is pneumatic, it must control the air pressure
Even can also be controlled by measuring the RMPS.
But this is even more complex.
Complicated project...

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FuYiVapE wrote:
Maybe, controlling the different forces that made the piece.
When the piece works on the tooth, use a specified force
When it reaches the gingival, the force is another (less force)
This can be done by controlling the current.
But if the piece is pneumatic, it must control the air pressure
Even can also be controlled by measuring the RMPS.
But this is even more complex.
Complicated project...

Perhaps you should volunteer to test his drill? :roll:

I hope that my dentist went to school and learned the physiology of human teeth.

David.

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I'm curious about your post:
https://www.avrfreaks.net/index.p...

Can you tell why your images got replaced by spam?

Smiley

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Joe,

Oh well done. When I saw this my first thought was "how is this spam?" but as the OP had 16 posts and the text seemed mildly technical in nature I made the mistake of not checking his other posts. What I was going to say on first seeing this thread was that this was some of the most inventive spam we'd ever seen but then I wasn't sure it was spam.

It's a clever technique our friend has developed here - that other post about timers looks VERY convincing (until the graphics were replaced!) so he's gone to some length on this one.

Sadly for him it ends here but for the sake of interest what I'm going to do is take a copy of his picture above, host it myself, then replace his link. If he replaces it I'll just put it back....

I'll edit any spam out of all his other posts.

Cliff

Last Edited: Tue. Mar 2, 2010 - 04:45 PM
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you also need the special connector for it.
Usually, you need air for cooling, and air or electricity for rotation depends on model.

If it's air forget it.

regards.

Last Edited: Tue. Mar 2, 2010 - 05:13 PM
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Just to note that having now reviewed all of "mahyarelc" previous posts I think it's clear he IS an AVR engineer, not a spammer and all that's happened is that image hosting sites he's used previously replace uploaded images with spam for their own service after a while.

But at least he now gets his drill image above permanently hosted at www.wrightflyer.co.uk ;-)

Cliff (moderator)

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it`s intresting that i see some peoples think i`m a spammer...
with 16 posts and not with ridicule the others to raise my posts like somebody!
i don`t know what happend to that image(or that host),but if anybody wants,i can show my conclussion of that topic!
if you know everything and think this question is not true or it`s not possible,please tell me the reasons. but if you don`t know about something ,please shut you mouth and let the other pepole discuss.
----
actually i want to know is this project possible? and what information i`ve to know.(i have six months if i want to start it)...
thanks FuYiVapE and leptronik for your ideas.
is it possible to do this project with sensors?(which sensor?is it possible with color sensor?or biosensor?or i`ve to know about current and voltage of device when it use...and many other questions!)
......
Regards

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Quote:

please shut you mouth

Continue like that and I will shut yours by locking this thread.

You must realise that spam is a major concern here and if something looks suspicious (as this frankly ludicrous thread does along with your previous post that DID contain spam images until I removed them) then action will be taken.

I thought I made it clear in my most recent post that I now believe such suspicions were unfounded and you were exonerated - so what's the problem? Why the abuse? Are you in favour of spam being allowed here?

Cliff (moderator)

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Quote:

I think it's clear he IS an AVR engineer
My bet is on a student, not an engineer, getting his final year project.

I get tooth pain from seeing the drill, but I get serious headaches thinking about all the paperwork and studies needed to get the final thing sanctioned by medical product regulatory agencies around the world. A sane professional engineer not versed in building medical equipment would drop such a project like a hot potato.

Stealing Proteus doesn't make you an engineer.

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i`m here to get answer of my questions and not to laugh.
maybe i was wrong where i was writting "please shut you mouth " ... but it`s for someone who ridicule the others.
for your note:befor you say i`m not a spammer,you wrote 2 posts.what was the first?what did that means?...then look at the David and hugoboss posts.you think those are scientific answers?!!!(even somebody redicule the other answers!)...after that you and Smiley think i`m a spammer because of an image!(and you don`t read the whole topic).finally you read that!thank god!
yea,you can ban me...but if you think,you warn the other people.
by these posts ,this topic is wasted...i hope somebody answer my questions.
---------
Regards

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http://www.youtube.com/watch?v=E3mzhvMgrLE
Something like this any good?

Quebracho seems to be the hardest wood.

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You must think like an engineer:

1. what's the difference between the states?
2. how the difference can be sensed?
3. how can it be converted into an electrical signal?

These steps must be done on every sensing task.

Since your tast was very special, I fear nobody of us can do the first two steps for you.
Only if you can provide an electrical signal, we may help further.

Peter

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I guess I COULD have made a more scientific answer if the problem given was a realistic one. Realistically, I see no reason why someone not qualified to determine where tooth ends and gum begins would even use such a tool. Do you plan to have a robot fix your teeth in the near future? Or is this an attempt to reduce your country's national need for dentists?

I also might add that you might get more serious attention if you spent some time spell-checking your posts. English not being your primary language is no excuse. My native language is French.

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John_A_Brown wrote:
http://www.youtube.com/watch?v=E3mzhvMgrLE
Something like this any good?

thanx.it`s very good
Quote:
I see no reason why someone not qualified to determine where tooth ends and gum begins would even use such a tool

it`s human works and mistake can happen.see youtube link.

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I am sorry if I appeared flippant. Personally I cannot see how you could automatically sense the layers of a tooth.

It is something that is a human skill from education and experience.

I can think only of the parallel task of investigating or trimming a cow's hoof. If you cut too deep in a healthy hoof, you get to very sensitive sole. From experience you can judge the normal depth of hoof of a 'typical' animal. You can apply pressure to assess softer tissue but the ultimate feedback is the patient herself. She will react sooner than you can feel, and I suspect that the same will apply to dentistry.

Any sensor that can detect softer material has already damaged the softer material.

David.

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mahyarelc wrote:
... you and Smiley think i`m a spammer because of an image!

What I said was:

Quote:
I'm curious about your post:
https://www.avrfreaks.net/index.p... ... highlight=

Can you tell why your images got replaced by spam?

Smiley

I'll repeat: I'm curious. I never said I thought you were responsible for the spam, I just wondered how it happened.

Cliff looked at your prior posts and said he thinks you are legit. I assumed you got caught in some kind of image hosting scam THROUGH NO FAULT OF YOUR OWN.

Now I don't know what to think.

Smiley

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This might be a well known scam technique - after a free "evaluation" file hosting period is expired, the hoster deactivates the account for further ex-owner's uploads and substitutes the images and/or a whole contents of the account with a hoster's own ad/spam.

Warning: Grumpy Old Chuff. Reading this post may severely damage your mental health.

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I think if I had the answer to the OP's question I would patent / produce the device myself and retire...

JC