Unscrew the Transfer Coping Screw?

I managed to round off the internal shape of a Straumann healing cap, about 8 years ago. I solved it by very carefully cutting a screw head shape into the remaining metal and then using a watchmaker's screwdriver to remove the cap. You possibly need to combine your skills and thinking with that of an engineer who has snapped off a stud in an engine block.

Make sure it is not your hex driver that has rounded off. I have replaced a number of drivers due to rounding of the hex but never had an impression coping screw rounded out. Try a new driver to verify this.

I once rounded off the internal hex of an abutement when I was removing a porcelain/metal crown from the implant abutement. (Diamond too close to the hex). Most implant vendors have a 'easy-out' type of instrument very similiar to what mechanics/plumbers/etc use to remove broken screws. Basically, it's a left hand thread that engages the stipped hex when you turn the wrench counter-clockwise. Works like a charm. About fifty bucks. Per the above post, also check your driver first.

Try an new sharp rosenbur in slow but high torque in a reversed mode, it will often do the trick.

It happened to me two days ago! I managed to cut the head of the transfer with a diamond bur, leaving intact the internal screw. Then, with a universal clamp, i could easily unscrew the transfer.

Isn't it unusual to torque an impression coping/transfer screw to 20Ncm? The information I pass on to my accounts (also from the implant manufacturers) is to secure the screw with finger pressure only. The various solutions posted are well worth remembering and I will pass those on as needed.

I agree. I would never torque an impression pin. It is not necessary. Secondly, Hex drivers are not all a like. Some only have a milimeter of hex, others 2mm of hex. Off brands usually are smaller and do not fully engage the female screw hex.

Lee, I have also used the "easy out" they do work in most situations.

The rosenbur idea sounds interesting. What is a rosenbur, anyway?

Just to be sure not to overlook the obvious, the Straumann System uses a Straumann SCS Driver. It may seem compatible with an .048 internal hex driver but it is not. It is also not compatible with Nobel Replace Select system