Replacing Implant Abutment Screws
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- เผยแพร่เมื่อ 2 ก.ค. 2023
- When you need a replacement screw for an implant abutment, it's important to get the correct one. But that's not always as easy as it sounds.
That's because for most implant systems, there are multiple screws available.
Those design differences include:
-the overall length of the screw
-the length of the head portion of the screw
-the diameter of the head
-the angle of the underside of the head
-distance from the bottom of the head to the implant platform
-distance from the bottom of the head to where the threads start
-the overall threadform, which includes the shape, angle, diameters, and pitch of those threads
That threadform is actually the only constant when looking at different screws for the same platform. That's because the thread design is built into the implant itself. So, any screw that's made to be compatible with a specific implant must have the same threadform as that implant's internal threads. The good news about this is that even if you end up with the wrong screw - as long as it was made for that implant platform, you won't damage the internal threads of the implant by using it.
Every other aspect of the screw design is dependent on the design of the abutment. And this is exactly why there can be so many different screws for the same implant platform.
A big part of this is due to there being multiple manufacturers that make compatible abutments for common implant systems. Atlantis Abutments, for example, makes abutments for all of the major systems including BioHorizons, Dentsply, Nobel, Straumann and ZimVie. And that's just one example, there are many many other abutment manufacturers.
But even if an original abutment is used, that is, an abutment made by the same manufacturer as the implant, there can still be multiple variations. For instance, a stock UCLA abutment might have a different screw design than a CAD titanium abutment.
Let's just use the Straumann Bone Level implant as an example. If we take a look at the RC platform, and just looking at screws sold by Straumann - there are 10 different screws. And even though all 10 of those screws share the same threadform and will therefore thread into an RC implant, they have very different designs. And each of those designs was engineered to work with their specific abutment counterpart.
So, this is why when you call the implant company or your lab and you tell them you need a replacement screw, one of the first questions they'll probably ask is which abutment was used.
If your lab is the one that provided the original abutment for that case, that information should be in their records. If, however, you are using a different lab, the best thing to do is to contact the original lab to determine what abutment was used.
The other option is to try to have your current lab identify the abutment and screw for you. This usually involves removing the abutment and sending both it and the screw to the lab for evaluation. Now, it's not always possible to identify the specific abutment and screw type. In that situation, you'll most likely have to start over with a brand new abutment. - วิทยาศาสตร์และเทคโนโลยี
top as always, thumbs up!
Thank you!
Hello I have upper and lower hybrid implants (dentures) and just the upper keeps loosing any recommendations or advise
Can implants come loose
Thank you, Doctor, for the information. The material that is placed on the head of the screw when installing the crown means the end of the work. If this material falls, will it affect the implant? Thanks
No, a failure of the restorative materials will not typically affect the implant.
@@OBrienDentalLab Thank you Dr
My implant crown broke after 4 years of having it , without looking at it the dentist says I would need to change both the abutment and the crown which is more costly as I am paying out of pocket … is this the normal process or should they only be replacing the broken crown?
I feel the abutment replacement is unnecessary but I’m also not the professional so I would easily lose that argument with them and have to pay the $1500 for both
Would you recommend continuing to trust them or go and get other dentist opinions on this situation
how often do you get orders for bridges with very high margins? for example, 5mm supragingival?
It is common to get requests for 1-2mm supragingival margins, but I don't recall ever getting a request for 5mm.
you should fabricate a crown to be cemented onto a tall stock healing abutment. i bet it would work. it would make a very interesting video
That's an interesting idea, but it wouldn't be an FDA approved workflow so it's not something we would do.
My crown keeps coming loose every couple months. My dentist is blaming my teeth grinding. Is that right for teeth grinding to loosen the screws in a matter of a month or 2 months.
Some studies have shown that parafunctional habits (such as teeth grinding) can lead to screw loosening. Here is one as an example: www.ncbi.nlm.nih.gov/pmc/articles/PMC6994738/
Hi. Not sure if you can help but I’m a little desperate. My dentist put the wrong size abutment on one of my implants & now can’t get it off. Have you ever heard of that happening?? Any suggestions would be truly appreciated.
Have you talked to your dentist about this? If they aren't able to help you, I would suggest finding another dentist or prosthodontist in your area to help you out.
are there stock abutments that a dentist can place so that another dentist with no implant experience can simply do an impression like doing an impression on a real tooth? and then cement the delivered crown to the abutment?
Yes, that can be done with virtually any stock abutment. The downside is that if the margins are subgingival, they are more difficult to capture than on a tooth prep.
@@OBrienDentalLab thank you sir
@@OBrienDentalLab what is the name of the method of a general dentist with no implant experience doing a conventional impression on an existing abutment?
@@mikehascats26 It's called "abutment level impression". I usually tell the doctor they will be taking the impression in the same manner as a tooth prep.