To Etch or Not to Etch

[Gru]

If I ever meet the inventor of veneers.....

Really beautiful restorations under the right indications.

Clarification of "the right indications":

1) They never go into the mouth.
2) You notify the doctor in advance that they will fail
3) If they violate #1, there is no warranty of any kind.

But hey, they preserve tooth structure until they fail, and they look great!

Seriously, has anyone any real data on the various zr etch products out there?

 

[eyeloveteeth]

we've do quite a few MD bridges a year and almost always insist on e.max -

the few we've done in zirconia always were posterior units and the wings were more like rest seats.

Any bit of "etching" helps.

 

[PDC]

Seriously, has anyone any real data on the various zr etch products out there?

I found this article which gives me hope. I am experimenting with some Tri-Dynamics gel (9.5% HF). I am going to leave it on for 24 hrs and see if I can tell a difference in the surface.

https://www.ncbi.nlm.nih.gov/pubmed/24492116

 

[sidesh0wb0b]

I found this article which gives me hope. I am experimenting with some Tri-Dynamics gel (9.5% HF). I am going to leave it on for 24 hrs and see if I can tell a difference in the surface.

https://www.ncbi.nlm.nih.gov/pubmed/24492116

i have the TriDynamics etch gel. i let it sit on a zirc test crown for a weekend. noticed no change. sandblasting with light pressure shows more "etching" on the surface than the acid does.

 

[Gru]

A while back- maybe a year someone posted about a zr etch gel, but I never heard anything more.

 

[PDC]

i have the TriDynamics etch gel. i let it sit on a zirc test crown for a weekend. noticed no change. sandblasting with light pressure shows more "etching" on the surface than the acid does.

Maybe I'll try a jackhammer!

 

[2000markpeters]

We have been using the Zircose E etching liquid for about 6 months now. All our zirconia gets etched before porcelain is applied or full contour before stain and glaze. Studies show 25% better bonding strength for bonding, porcelain adhesion and glaze adhesion. It is somewhat expensive but we charge $9 per unit for the process. You must take extreme precautions using it, it is highly dangerous to handle and you must use their fume hood with extraction. Follow the protocal correctly and you get great results. I buy it from Nordenta here in Canada

 

[PDC]

Here are some interesting studies on bond strength using various resins on sandblasted surfaces of pre and post sintered zirconia.

 

[PDC]

Ok I had to post the URL...couldn't get the specific page to post. Anyway it's on page 6 or listed as 656.


http://bjmlabs.com/images/scientifi...ear bond strength of dental resin cements.pdf

 

[sidesh0wb0b]

Ok I had to post the URL...couldn't get the specific page to post. Anyway it's on page 6 or listed as 656.


http://bjmlabs.com/images/scientific_papers/Zirconite/2 zirconia polycrystal and the shear bond strength of dental resin cements.pdf

back from 2010 though, wonder what the new studies show.

 

[Juko]

I am.congenitally missing my laterals. I have inlay prepped Emax md bridges. They've been bonded in place for almost 9 years now.

I also made a no prep one wing md bridge for a guy. The wing eventually broke however It stays in by itself and the guy eats with it. Omega?