Great video. I had a query regrading a case planned for hybrid denture. I have a patient who is planned for a hybrid denture on Nobel implants. Five implants have been placed. For a hybrid denture, can I use the gold adapt non-engaging abutments or do I have to go for multi-unit abutments only?
Yes, you can use gold adapt non-engaging abutments for a hybrid but these days many labs would prefer to do a CAD titanium substructure instead of a cast metal substructure for hybrid dentures.
Can you have a custom abutment for screw-retained crown? Sounds like we only use Ti-base abutment (which is a stock abutment) nowadays and custom abutments are not used for screw-retained crown.. please clarify
Yes, it is possible to use either a custom abutment or a titanium base when making screw retained crowns. We generally prefer to use custom abutments for our screw retained crowns as they give us more control over sub-gingival contours, abutment height, and material thickness.
For a UCLA abutment to be used to make a traditional screw retained crown, metal must be cast directly to the UCLA abutment. It is not possible to cast zirconia or lithium disilicate (emax). You may find this video helpful: ruclips.net/video/GN26lncu2ZY/видео.html
The Ti bases have a fixed emergence profile, so there's just less control. In some situations you may find that the diameter of the Ti base is too large, especially when the implant is significantly subcrestal. As far as the gingival height, it depends on the company. Some systems only come with one height and others come with multiple heights.
Terrific video. Thank you. When using Tibase (variobase from Straumann), I always ask the lab to return the crown uncemented so I can check the fit. The crown always returns with slight rocking or twisting. Any solution you can think of please?
There are a few things that can contribute to that, with the main one being the design of the variobase. It's just a short cylinder with four small antirotation nodes. Those nodes do not extend the entire vertical length of the abutment so they have undercuts to them. Those undercuts have to be blocked out, either by software or with wax by hand. Depending on how well the block out is done; the pressed, milled, or cast restoration may not immediately fit. The technician must then adjust the inside of the crown so that it will seat on the abutment. This can make it so that the crown have some movement. There are also some parameters within dental design software that can affect how loose or tight the fit is. You will typically get a much more intimate fit when using a well designed custom abutment as opposed to a variobase.
In your experience, how well do titanium abutments hold up to full cast gold crowns. My dental treatments are done at the Palo Alto VA hospital dental office. Thank you
@@OBrienDentalLab I was called and asked to change my zirconia implant premolar # 29 from zirconia to full cast noble gold because it to and risk of fracture # 30 will remain full cast gold as I requested. What questions can I ask my Dentist about screw retained implants that may help prevent fractures.
![TI Base Implant Crown Design With Exocad [ Model Creator Bonus Implant Ti-Base Design Tutorial ]](http://i.ytimg.com/vi/0MVNtL3pGww/mqdefault.jpg)
You give us information that I couldn't find anywhere thanks a million
You're welcome!
0:18 Castable abutment (UCLA)
0:43 Titanium base (Ti base)
1:01 Comparison
Your videos are amazingly helpful...thank you
Great video. I had a query regrading a case planned for hybrid denture. I have a patient who is planned for a hybrid denture on Nobel implants. Five implants have been placed. For a hybrid denture, can I use the gold adapt non-engaging abutments or do I have to go for multi-unit abutments only?
Yes, you can use gold adapt non-engaging abutments for a hybrid but these days many labs would prefer to do a CAD titanium substructure instead of a cast metal substructure for hybrid dentures.
Can you have a custom abutment for screw-retained crown? Sounds like we only use Ti-base abutment (which is a stock abutment) nowadays and custom abutments are not used for screw-retained crown.. please clarify
Yes, it is possible to use either a custom abutment or a titanium base when making screw retained crowns. We generally prefer to use custom abutments for our screw retained crowns as they give us more control over sub-gingival contours, abutment height, and material thickness.
you have the best dental lab videos on youtube
Thank you so much!
Alex, why can't you use zirconia or emax with the UCLA abutment? thanks!
For a UCLA abutment to be used to make a traditional screw retained crown, metal must be cast directly to the UCLA abutment. It is not possible to cast zirconia or lithium disilicate (emax). You may find this video helpful: ruclips.net/video/GN26lncu2ZY/видео.html
Great video Alex, many thanks. Can you do a video on custom abutments, in terms of their materials and method of fabrication ? 👍🏽
Great suggestion!
Thank you for explaining
Glad it was helpful!
Hello Sir.
Does Tibase gives us a better emergence profile and do they come in different gingival height?
The Ti bases have a fixed emergence profile, so there's just less control. In some situations you may find that the diameter of the Ti base is too large, especially when the implant is significantly subcrestal. As far as the gingival height, it depends on the company. Some systems only come with one height and others come with multiple heights.
I wish to understand the difference between regular abutments vs ti- base
Terrific video. Thank you. When using Tibase (variobase from Straumann), I always ask the lab to return the crown uncemented so I can check the fit. The crown always returns with slight rocking or twisting. Any solution you can think of please?
There are a few things that can contribute to that, with the main one being the design of the variobase. It's just a short cylinder with four small antirotation nodes. Those nodes do not extend the entire vertical length of the abutment so they have undercuts to them. Those undercuts have to be blocked out, either by software or with wax by hand. Depending on how well the block out is done; the pressed, milled, or cast restoration may not immediately fit. The technician must then adjust the inside of the crown so that it will seat on the abutment. This can make it so that the crown have some movement. There are also some parameters within dental design software that can affect how loose or tight the fit is. You will typically get a much more intimate fit when using a well designed custom abutment as opposed to a variobase.
@@OBrienDentalLab thank you very much for the prompt response
In your experience, how well do titanium abutments hold up to full cast gold crowns. My dental treatments are done at the Palo Alto VA hospital dental office.
Thank you
We find that they work great!
@@OBrienDentalLab
I was called and asked to change my zirconia implant premolar # 29 from zirconia to full cast noble gold because it to and risk of fracture # 30 will remain full cast gold as I requested. What questions can I ask my Dentist about screw retained implants that may help prevent fractures.
Great sir,more information is needed on full arch implant prosthodontics
Thank you, we'll look in to making some of those!
Hey Alex! Awesome content! Question though: any major considerations or differences between these two as far as impression techniques?
Other than some very specific situations, the impression technique wouldn't typically be a determining factor when choosing the type of abutment.
Superb
Thank you so much!
good work, great content, thank you.
Thank you!
great content,learned a lot for sure!
Glad it was helpful!
Great breakdown! IMO, Atlantis Custom Abutments are the best option in most cases.
Atlantis makes quality abutments for sure, and we agree that a custom abutments is almost always superior to stock.
Thanks a lot for the info
You're welcome!
Very helpful video. Thank you!
Glad it was helpful!
Excellent
Thank you so much 😀
Ti base has to be upside down
Grrrr
😂😂😂😂
Dr.waldemarson DMD PhD