Diese Bohrführungseinheit weist variabel einstellbare Führungseinheiten zur Einstellung von Bohrwinkel, Bohrrichtung und Bohrtiefe für Vorbohrungen an Knochen auf, sodass ermittelte Planungsdaten wie Einbringwinkel und Bohrtiefe umsetzbar sind.The unit (BFE) has a truncated cone (KE) including a cover region (DB) and a guide element (FE) i.e. fixing screw, for performing a defined drilling. The guide element adjusts a drilling angle. Another guide element (VH) adjusts a drilling direction. A hollow cylinder is displaceable along the former guide element and extends from the former guide element upto a bottom of the truncated cone. The hollow cylinder is extended by an extension element. A drilling angle plate (BWH) is provided with the former guide element.
