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  #1  
Old 11-02-2019, 08:26 PM
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Steve Lindsay Steve Lindsay is offline
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Default background removing

I like a dental rotary for background, inlays and undercutting rather than a flat graver. Combines several steps in one. With rotary you can remove background and stipple in the same step. After lowering an area I'm just bouncing on the bottom to resemble stippling. It will look matted after blackened. In the early 80s I was using a dental handpiece that was made by Buffalo Dental. The bearings required oil drip into the line and it would blow oil on the back of your hand. Now days they have ceramic bearings and no oil is required. The one I use now is a NSK Presto.

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  #2  
Old 11-03-2019, 07:26 AM
SEngraver SEngraver is offline
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Default Re: background removing

Hi
Thank for the clip Steve.
SE
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  #3  
Old 11-03-2019, 02:11 PM
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JJ Roberts JJ Roberts is offline
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Default Re: background removing

I use a single point 90 degree graver to remove the background,one slip with a rotary tool and you'll have a big problem. J.J.
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  #4  
Old 11-03-2019, 07:03 PM
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Default Re: background removing

Hi JJ, Yes, you need to be careful or you can wipe something out quick.
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Old 11-03-2019, 08:14 PM
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Default Re: background removing

Steve,Thanks I'm not in a rush plus I don't trust myself with a rotary tool and will stay with single point graver. J.J.
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  #6  
Old 11-03-2019, 09:35 PM
flintdoubles flintdoubles is offline
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Default Re: background removing

Steve, where is the best place to buy a NSK ?
Thanks,Leland
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  #7  
Old 11-03-2019, 09:43 PM
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Hi Leland, In 2001 or so I was a dealer for them. Decided I don't want to support them though. Check ebay. They show up there sometimes at a good price. The front end with the bearnings comes unscrewed and there are dental equipment repair people that carry replacement front ends. They are on ebay too. https://www.ebay.com/sch/i.html?_fro...resto&_sacat=0

Lookout because there is also one called "Presto Aqua". It is different than the Presto. The Aqua has another line to it that sprays water.

I have the dental disc pedals for them though. $89 I've been sending them out with a splitter to tie it in with the AirGraver regulator. The pedal is at the very the 2nd item from the bottom on this page: https://airgraver.com/Lindsay-AirGra...OOT%20CONTROLS
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Old 11-03-2019, 09:51 PM
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Default Re: background removing

Also watch out there is a knockoff NSK Presto tools from China on ebay. A year or so ago I spoke to a dental parts company and he said China not only made a cheap copy of the tool they are copying the name "NSK Presto" too. In that link in my last post I see some of those China ones there.
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Old 11-05-2019, 01:44 AM
-Daniel- -Daniel- is offline
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Default Re: background removing

Hi Steve,

thank you for the video!

What kind of tip hast the burr you are using? In the video it looks like a fine but round tip, is that right? I cant see sharp edges or teeth, how could this remove metal then?
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  #10  
Old 11-05-2019, 02:24 AM
Elmer Elmer is offline
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Default Re: background removing

Steve,
I have the same rotary tool, i know some dentists here in my small Alaskan town and scored a bunch of carbide burs of various shapes and i am well pleased with the delicate control that it delivers...
I am curious though ... what bur was that you were using? the convex tip shape seems handy.
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  #11  
Old 11-05-2019, 08:54 AM
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Default Re: background removing

It is a worn carbide bur that I'm regrinding. Hold it against a diamond bench stone while it is spinning to grind to point. Then put your finger on the point so it can't spin and grind random facets on it. You'll see during the video I stop several times and ground another flat. Once at around frame 3:37 For that area it was a little small and not cutting very fast. I'm just reaching to the bench while holding it from spinning and grind another flat on it. It is on a 2000 diamond bench stone. You can adjust the size of it this way too. When too fat for the area grind it while it is spinning again. After placing a flat on see how it is cutting and if not well, put another on until it does and is the size needed.

Also at around 0:47 I reached over and ground another facet.
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Old 11-05-2019, 01:18 PM
-Daniel- -Daniel- is offline
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Default Re: background removing

Thank you for your answer, Steve!

So it is like a diamond shape then? I will try this.

Do you have plans to add some further videos? It would be nice to see a inlay or sculpting video
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  #13  
Old 11-05-2019, 01:22 PM
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Default Re: background removing

Hi Daniel, It is all shapes. In other words it is a little different shape each grind with random facets. If it doesn't cut put another on until it does.
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Old 11-05-2019, 02:42 PM
papart1 papart1 is offline
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Default Re: background removing

try UtahHandpeicerepair.com and see if they have something worth looking at. I bought mine from there and I love it. They are really nice..........but sometimes they hit the road for shows, check please. paps
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  #15  
Old 11-24-2019, 10:19 PM
schoggi schoggi is offline
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Default Re: background removing

Any chance to have a close up pick or drawing of that point??
sorry for my bad english, an image would make things much clear
thanks in advance
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  #16  
Old 11-25-2019, 03:42 PM
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Dave London Dave London is offline
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Default Re: background removing

MTC
As Steve stated really no particular point, however a shape like a common screw driver or a 4 corner point like the fixture Tim Wells sells work fine. You can find Timís fixture a the bottom of the template page,I think maybe Steve can give you a link
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  #17  
Old 11-25-2019, 08:27 PM
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Default Re: background removing

Quote:
Originally Posted by schoggi View Post
Any chance to have a close up pick or drawing of that point??
sorry for my bad english, an image would make things much clear
thanks in advance
Hi, The shape changes each time. I don't even look at it to see the current shape. From one random grind to the next time I grind another facet it is different.
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  #18  
Old 11-28-2019, 01:19 PM
takedeadaim takedeadaim is offline
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Default Re: background removing

I also got mine at Utah Handpiece repair. I have a brother in law that is a dental lab tech and he sent me to them. I had a good experience and enjoy my tool. I have found that keeping the RPM up actually helps control the tool. I prefer to cut the edges of background a background graver but the rotary is nice for larger areas. Here is a link to the tool https://utahhandpiecerepair.com/prod...sto-handpiece/
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