Milling titanium

[DrDee]

Can we mill our own custom abutment including the connection and screw from Ti blanks, if so how and any opinion on their accuracy compared to premills provided by the company

 

[TheLabGuy]

In the USA, must have 510k from FDA to mill implant connections so...therefore NO!!!

 

[CoolHandLuke]

theres a lot to unpack here.

first off, what TheLabGuy said is completely true, in the USA you are responsible for the longevity of the prosthetic

that comes with a bit more though.

1. its just not as simple as calculating a crown; you are typically not provided toolpaths or tooling that will create the connection for you it must be engineered by your cadcam provider.
2. making your own screws needs a lathe process that exactly 0 people in the continental USA have access to or have knowledge how to use.
3. none of this connection information is public domain, all of it is copyrighted so if you do it you can open yourself up to lawsuits
4. the reason premills exist is due to reasons stated above, which covers you against lawsuits as premills are already manufactured
5. it is probably going to be in your best interests not to try to mill connections from ti pucks until/unless your cadcam provider makes this possible, because a recent FDA ruling will now allow companies who are already 510k compliant to sell equipment as a package that can create these devices in a sufficiently repeatable fashion, that the 510k certification can be passed to the customer. this means eventually if cadcam companies put in the work, they can sell a mill that can do this process all above board. this was revealed in the Chicago show.

watch for that in your sales literature going forward.

 

[Sevan P]

Not sure outside of the USA but in the USA FDA 510k 100%. Also why? Cost? In all honesty I wanted to bring milling abutment in house, so we are now milling from pre milled blanks. Truthfully i would of rather kept sending them out. It is not all that is seems. Fun yes, but more stressful if you can not have a tech dedicated to handling the entire process from start to finish. Much easier to have others do it.

 

[DrDee]

theres a lot to unpack here.

first off, what TheLabGuy said is completely true, in the USA you are responsible for the longevity of the prosthetic

that comes with a bit more though.

1. its just not as simple as calculating a crown; you are typically not provided toolpaths or tooling that will create the connection for you it must be engineered by your cadcam provider.
2. making your own screws needs a lathe process that exactly 0 people in the continental USA have access to or have knowledge how to use.
3. none of this connection information is public domain, all of it is copyrighted so if you do it you can open yourself up to lawsuits
4. the reason premills exist is due to reasons stated above, which covers you against lawsuits as premills are already manufactured
5. it is probably going to be in your best interests not to try to mill connections from ti pucks until/unless your cadcam provider makes this possible, because a recent FDA ruling will now allow companies who are already 510k compliant to sell equipment as a package that can create these devices in a sufficiently repeatable fashion, that the 510k certification can be passed to the customer. this means eventually if cadcam companies put in the work, they can sell a mill that can do this process all above board. this was revealed in the Chicago show.

watch for that in your sales literature going forward.

thank you, very helpful, not from the US hence, also here in India we do have a few who provide Aurum based ones when clinicians fail to give the required components

 

[2000markpeters]

CAM strategies for connections is a very tricky game to play. The strategies need to be bang on. It took us about 6 months to get most of them "right". Forget Straumann RN and WN, Most difficult connections by far to try and get the geometry and connection "right". You need a big accurate mill to do this. Our 1600lb 5 axis mill could "just" do it. If your geometries are even off by microns the abutments will fail over time with micro movement and screw loosening's etc. Just buy the premilled blanks and you are off to the races with most standard wet mills and no headaches.

 

[Beldent Inc.]

I do milled customs but only premilled blanks no millig the interfaces! we in Canada also