摘要：

A specially shaped hole in an aiming device which enables the surgeon to perform an incision through the aiming device transverse hole in a plane that contains nail hole axis. Incision is therefore important to prevent undesirable side pull stress over the drill guide inserted through the aiming device transverse hole, which causes apparent problems in order to fit the drill through the hole in the nail. Thus, at least one screw for interlocking the nail with surrounding bone can accurately be installed.

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