A method for making a guide channel includes providing an auxiliary jig comprising a coupling structure and a corresponding coupling structure of a drilling jig so that the auxiliary jig and the drilling jig are arranged in a defined spatial position. An auxiliary bore is drilled into the auxiliary jig. An auxiliary bore sleeve comprising a reference ring plane is inserted into the auxiliary bore predefined by a target depth. The auxiliary jig is placed on the drilling jig in the defined spatial position. A guide bore is drilled into the drilling jig. A guide sleeve is inserted into the guide bore using a positioning tool so as to form the guide channel. The guide sleeve comprises a depth stop for the drill stop. The guide sleeve is inserted to an insertion depth defined by the reference ring plane and the reference device. The auxiliary jig is removed.
