English to German Medical Medical: Instruments Bone surgery

Es ist eine Operationsanleitung zur Extraktion von Marknägel (Fassier-Duval). Es wird der Einsatz von "female trephines" und "male trephines" empfohlen. "Female trephines" habe ich bisher als "Hohlfräser" übersetzt, habe aber keine Übersetzung für "male trephine" gefunden.

When necessary to remove bone to create a path for the male component wings, use Male Trephine over the Male Component shaft to clear the path.
Take care not to hit the wings of the male component when advancing the Male Trephine. It is recommended to finish the removal of bone near the wings manually with a Jacobs Chuck.

If bone has grown over the Female Component, ream with the recommended Female Trephine (see table) to expose the head.
If advancement becomes difficult or overheating of the instrument is observed, back-out the Female Trephine and clean the teeth and core