Surgical instrument

A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising:

• a first fastening device having at least one receiver opening;
• a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device;
• and
• at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device,
• wherein the at least one guide slot comprises a hole row defined by holes extending through the guide device in the orthogonal direction for latching of the at least one sliding member, wherein the holes are spaced apart from one another along the longitudinal direction and establish several latching positions for the at least one sliding member.

A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising:

• a first fastening device having at least one receiver opening;
• a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device;
• and
• at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device,
• wherein a portion of the guide device adjacent to the at least one guide slot and/or the at least one sliding member is spring-elastically deformable against a return force, wherein the at least one sliding member is held with the guide device by means of the return force.

A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising:

• a first fastening device having at least one receiver opening;
• a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device;
• at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device;
• and
• a fixing device that is switchable between a fixing state for fixing relative movability between the first fastening device and the guide device, and a release state in which relative movability between the first fastening device and the guide device is not,
• wherein the fixing device comprises a tooth row extending parallel to the at least one guide slot, and an engagement device which, in the release state, is adjustably movable relative to the tooth row parallel to the at least one guide slot, wherein the tooth row is fastened to the guide device and the engagement device is mounted on the first fastening device.

A surgical instrument for use in a total knee arthroplasty, the surgical instrument comprising:

• a first fastening device having at least one receiver opening;
• a guide device which is configured to be releasably coupled to the first fastening device, the guide device comprising at least one guide slot extending along a longitudinal direction wherein the at least one receiver opening extends in an orthogonal direction relative to the longitudinal direction when the guide device is coupled to the first fastening device;
• and
• at least one sliding member configured to be inserted along the orthogonal direction through the at least one receiver opening and into the at least one guide slot to thereby releasably connect the first fastening device with the guide device, wherein, when the first fastening device is connected with the guide device, the at least one sliding member is movable along the at least one guide slot in the longitudinal direction to thereby allow a relative movement guided in a sagittal guide plane between the first fastening device and the guide device,
• wherein the at least one guide slot extends in arcuate form within the sagittal guide plane.