You ever seen this?

[TheLabGuy]

I've seen a couple hexes on an internal connection snap off, and a handful of screws snap over the last 30+ years in the biz. Always due to occlusion, even instructed the hygienists/Docs to check implant crown occlusion when the patients come in for their recall/routine cleanings. What happens over time, is the vertical collapses, teeth get worn, pdl's collapse, etc... Now most of my clients get the hygiene on board, if a patient comes in for a cleaning and has implants, they check with some articulating paper and if high, adjust accordingly.

However, I've never seen this...I believe this was a conical connection - Straumann RC - snapped the screw and the abutment right in half. The rest of the screw is still deep in the implant, look closely. It's a case we did six years ago for the Dentist himself, his mouth. Told him to stop smarting off to his wife but he swears he was just eating a burrito.

 

[Car 54]

Winner

even instructed the hygienists/Docs to check implant crown occlusion when the patients come in for their recall/routine cleanings. What happens over time, is the vertical collapses, teeth get worn, pdl's collapse, etc... Now most of my clients get the hygiene on board, if a patient comes in for a cleaning and has implants, they check with some articulating paper and if high, adjust accordingly.

And just to add, one of the reasons I leave my lingual margins at tissue height on custom abutments, is to be able to use that as a reference point in keeping track of any possible tissue loss and to figure out why, as needed.

 

[TheLabGuy]

Winner

And just to add, one of the reasons I leave my lingual margins at tissue height on custom abutments, is to be able to use that as a reference point in keeping track of any possible tissue loss and to figure out why, as needed.

Very smart, never heard of that technique before, thanks for sharing.

 

[CoolHandLuke]

I've seen a couple hexes on an internal connection snap off, and a handful of screws snap over the last 30+ years in the biz. Always due to occlusion, even instructed the hygienists/Docs to check implant crown occlusion when the patients come in for their recall/routine cleanings. What happens over time, is the vertical collapses, teeth get worn, pdl's collapse, etc... Now most of my clients get the hygiene on board, if a patient comes in for a cleaning and has implants, they check with some articulating paper and if high, adjust accordingly.

However, I've never seen this...I believe this was a conical connection - Straumann RC - snapped the screw and the abutment right in half. The rest of the screw is still deep in the implant, look closely. It's a case we did six years ago for the Dentist himself, his mouth. Told him to stop smarting off to his wife but he swears he was just eating a burrito.

View attachment 44551 View attachment 44552

there was a similar thing occurring with people with Biohorizons implants failing, there was a thread here...

Anyone see this with biohorizons abutments?

Multiple have come back to our lab with this part sheared off, its happened on uclas, temp abutments, final abutments, the only correlation is that weve only seen it with biohorizons, and its not limited to a specific platform.

dentallabnetwork.com

 

[Andrew Priddy]

I've seen it on a few BLRC's, we believe the screws were loose on both cases

 

[grantoz]

there was a similar thing occurring with people with Biohorizons implants failing, there was a thread here...

Anyone see this with biohorizons abutments?

Multiple have come back to our lab with this part sheared off, its happened on uclas, temp abutments, final abutments, the only correlation is that weve only seen it with biohorizons, and its not limited to a specific platform.

dentallabnetwork.com

ive seen it a few times now with the 4.5 ti base where the hex shears off.

 

[Affinity]

I just had the same with bioH a few months ago, snapped in half at the hex. Dr wanted me to get a new screw, I said, the hex is missing! Pt also broke about 4 other zr crowns we had done on him at the same time, asst said he started drinking again.. haha Id believe that over a burrito did it!

 

[sidesh0wb0b]

I've seen a couple hexes on an internal connection snap off, and a handful of screws snap over the last 30+ years in the biz. Always due to occlusion, even instructed the hygienists/Docs to check implant crown occlusion when the patients come in for their recall/routine cleanings. What happens over time, is the vertical collapses, teeth get worn, pdl's collapse, etc... Now most of my clients get the hygiene on board, if a patient comes in for a cleaning and has implants, they check with some articulating paper and if high, adjust accordingly.

However, I've never seen this...I believe this was a conical connection - Straumann RC - snapped the screw and the abutment right in half. The rest of the screw is still deep in the implant, look closely. It's a case we did six years ago for the Dentist himself, his mouth. Told him to stop smarting off to his wife but he swears he was just eating a burrito.

View attachment 44551 View attachment 44552

i have a hard time wrapping my head around how that screw would shear off that far inside the fixture
there shouldnt be any lateral forces down there! the only thing i can think of is the wrong screw and when it bottomed out and was torqued more it created some horizontal stresses that lead to it shearing off when the abutment failed. that is a wild one for sure. retrieval will be oh so much fun!