Broken screws for Coaxis and Genesis implants

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Posted on By sameh barsoum In Implants

that's a lucky patient! came for FPD replacement of missing 5,12.
Pano showed this picture I asked him to check with the colleague about the implants: both Keystone Genesis and Coaxis.
I wonder if there is a kit specific to these 2 implants to protect the threads during screw retrieval?


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5 Comments

Sameh;
Good question. Not sure. Some systems have these kits. If not there are universal kits available from Salvin. regards and good luck Dr. Salama


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Yes I have an excellent kit for Ankylos which protects everything, couldn’t locate the universal one @salvin


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Before restoring, I would look into reasons that had caused the teeth and then screws to fail. Too much of coincidence and bilateral ...
to remove the screws may I suggest an endo piezo tip under a microscope. It will vibrate and unwind them out without any kits.


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actually that's too risky an approach: risk of damaging the top threads and the housing.
the case ended successfully: I injected high durometer strength PVS to take an impression all the way to the top of the broken screw, poured it in stone took an end cutting bur, centered it over the screw (aided with microscope magnification), stabilized it with paper clip/plaster to the stone model and injected duralay around it, put it in a pressure pot and used the duralay index to protect the sides so that drilling was centered over the screw. Had to go very slowly because no coolant could reach the drilling spot. Once I was through I bevelled an old hex driver went through the hole. It engaged the inner surface of the drilled screw and could safely unscrew it.


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great idea, do u have any pictures (of the preparations, index etc..) to add to your post ?
tnx aryeh


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