Dr. S asks:
Can anyone verify for me whether the implant in this photograph is an internal or external hex implant? I am told by the patient’s previous dentist that both implants are Nobel Replace Select Implants (Implants were placed in 1999). The Nobel rep said they look like external hexed implants from the radiograph. I think they look like internal hexed implants. I have to order parts to re-restore this trauma case. I would appreciate any feedback. (I plan to drill a slot in the broken abutment screw and take the broken abutment screw out with a straight edged screw driver.). Thanks in advance for any input re: ext vs internal hex.
Is This Implant an Internal or External Hex Implant?
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your rep is right , external
Look at the underside of the abutment. It is definitely an external hex.
This is an old replace not select, with a 1mm height external hex(designed for individual crowns).
cheers
alex
External hex it is. When trying to remove the screw try placing a dimple in the fractured end of the screw with a small round diamond in a fast handpiece. With an ultrasonic scaler, place the tip on the dimple and try and reverse it out with the ultrasonic tip on. This should soon vibrate the fractured piece out.
Hi
External hex
Good luck with the removal.
If you are having trouble determining whether this implant is internally or externally hexed, may I respectfully suggest that you don’t attempt to treat the case until you have more experience. It’s clear that your experience is limited and you’re doing no one a favour by attempting to do things you are not competent at doing.
I don’t mean to be offensive but you have to crawl before you walk.
Good Rep.
Ext. Hex.
External hex. Probably a Steri-Oss if it is in the Nobel line. If it was placed before 2003 or so most likely is always external as internal were not as popular at that time and relatively new. Good luck.
external hex- no doubt. You might try to grab the fractured screw with a silver cone forcepts
External Hex. But why did the restoration fail? Try to find out what caused this to happen so that a future failure does not become a bigger problem for you.
The crown shows you the response to your question. An internal Hex never has a platform, it will be the same width. Nobel stopped suddenly selling this implant and changed to replace select implant line. Try to unscrew them very slow. Good luck
It is an external hex- no doubt. The reason of the fracture- non echilibrate bite. Remove – with an ultrasonic scaler.
External hex, narrow platform.
After removing the screw, check carefully for simetry and any deformation or fracture on the hexagon and platform on the implant.(try to take an impression of it and pour in duralay, if it is not easy to visualise)
The implant platform may have been damaged in the impact,as these implants are made from a softer grade of CP Titanium in which case you will probably need to remove and replace the implant.
Ya.. its external hex..
This is an external hexed implant. Get the nobel biocare screw removing instrument or the sterioss screw removal kit to remove the fractured screw. They both work the same way.
You are definitely facing an external hexagon. Before his second photograph – crown – their situation is resolved!
This is an external hex implant and appears to be a Nobel Replace fixture.
The implant has an internal connection. There is a kind of adapter between the implant and the Abutment what makes it to an external one. Could be also Neoss
The top part of the dental implant is called Hex. It has a locking mechanism, which may be inside the body of the implant- internal hex implants, or stick as a platform above the body of the implant-external hex implants. Also, if you look at the implant from the top you will see the threaded ‘canal’ in the middle of the hex going down the body of the implant. The future restoration will be seated on the hex and screw tightened to the implant. It is doctor’s preference which type of implants to use. I prefer internal hex implants for these reasons: they give a better retention for the future restoration, and they can be placed slightly deeper allowing for more cosmetic restorations