Anyone casting to TI interface?

[2thm8kr]

Good luck.

 

[charles hallam cdt]

Thanks 2thm8kr. The oxide layer that forms easily blast off with al oxide. If I didn't blast it off would not fit the tri lobe.

 

[STJDENT]

just cast the mesio structure separately and then cement it to the ti base.

Or Laserweld

 

[CatamountRob]

May I ask what the good reason is.i would then ask why they make engaging and non engaging. Mechanical retention maybe.

Engaging/Non-Engaging has nothing to do with the connection between your alloy and the base. You may want to look into taking some implant courses, it's never a bad thing to increase your knowledge base.

 

[2thm8kr]

Thanks 2thm8kr. The oxide layer that forms easily blast off with al oxide. If I didn't blast it off would not fit the tri lobe.

 

[aqdental]

E

every time we put a tourch to our alloys we change the physical and mechanical properties of that alloy which is why we add fresh alloy to every cast. The only complaint I see here is that I'm casting instead of bonding to the interface. So if a bond failure occurs it's ok because we followed directions. If someone has evidence that by heating Ti now turns into a cancer causing metal this discussion would be over

Charles, not sure how you read posts but is the TITANIUM that at 882 Celsius changes ( I think is called beta phase). It's ( the Titanium) proprieties change ( physical and mechanical). As far as I remember becomes brittle. Please check any Ti porcelain on the market and see the firing temp ( they all are around 800 max : I wonder why?).

 

[aqdental]

Or Laserweld

Ti can only be welded to Ti, he is casting semiprecious so not possible in his case.

 

[charles hallam cdt]

Charles, not sure how you read posts but is the TITANIUM that at 882 Celsius changes ( I think is called beta phase). It's ( the Titanium) proprieties change ( physical and mechanical). As far as I remember becomes brittle. Ple ase check any Ti porcelain on the market and see the firing temp ( they all are around 800 max : I wonder why?).

 

[charles hallam cdt]

What other concerns do you have besides bond issues

 

[charles hallam cdt]

Engaging/Non-Engaging has nothing to do with the connection between your alloy and the base. You may want to look into taking some implant courses, it's never a bad thing to increase your knowledge base.

I'm sure we could all benefit from a few course. I do understand the difference between mechanical and chemical bond. I know that u get a chemical bond with gold adapts. But isn't the waxing sleeve held in place by mechanical in which would also cast. I understand that it's the chemical bond that ultimately gives u the best bond

 

[2thm8kr]

There are at least 7 technicians with various skill and experience levels advising you against this, I suspect on Monday you will have more. Besides 'How Stuff Works', do you have any peer reviewed scientific literature that backs this technique? If you do I would love to see it, especially if you have information on the benefits of implant longevity by sandblasting the abutment interface with al02.

 

[charles hallam cdt]

Blasting at less than 1 bar don't think will hurt interface. But no I do not have any documentation to back up any of this. Just wandering has anyone tried this first hand or just don't try it cause everyone says not to. I have to admit I am hard headed and usually have to learn firsthand

 

[2thm8kr]

I have to admit I am hard headed and usually have to learn firsthand

Obviously and I respect that. Do some research on this.

 

[charles hallam cdt]

That's why I started this post. Up Most respect to all here. One of the tech sites out there

 

[charles hallam cdt]

That's why I started this post. Up Most respect to all here. One of the tech sites out there

Best tech sites out there

 

[aqdental]

Phillips' Science of Dental Materials - Page 384 - Google Books Result
https://books.google.com.au/books?isbn=0323242057
Kenneth J. Anusavice, ‎Chiayi Shen, ‎H. Ralph Rawls - 2014 - ‎Medical
TITANIUM-BASED ALLOYS Commercially pure titanium undergoes a phase ... Therefore, the recommended type of low-fusing ceramic should be used.
This may change your mind.

 

[STJDENT]

Ti can only be welded to Ti, he is casting semiprecious so not possible in his case.

Mixing different materials is not so good, I thougth he ment TI to TI

 

[Tom Moore]

One problem is the heavy oxide between the Ti and noble alloy will cause micro movement between them in time and could cause crown failure and even implant failure.

I never want to spend time explaining what I did when I can give them a copy of the material manufacture protocols and show that is part of our GMP's as the FDA says every lab must have in place.

No playing scientist with live patients ever, ever, ever.

 

[KentPWalton]

The whole reason trying this is I'm tired of paying $250 for ucla abuts from noble.

Just pass the charge on to the Dr. and charge extra to account for your time.

Not that big of a deal, that's the cost of doing implant cases. It's much more

than a traditional bridge case. Components cost money as well as labor.

 

[KentPWalton]

....and people are worried about sending stuff to China because they don't know what they are getting....

This is why the FDA or some other Federal agency will eventually be more involved in dental labs.

It's already started this year with 3Shape.