Surgical Instrument

Abstract

Surgical instrument (1) for use in knee replacement surgery, comprising a first fastening device (100) which is designed for detachable fastening to a reference component (600) attached to a distal femur (F), a second fastening device (200), which is spaced distally from the first fastening device (100) and is designed for detachable fastening to a tibial cutting block (700) for cutting on a proximal tibia (T), a circular arc guide (300) which is connected at one end to the first fastening device (100) and at the other end to the second fastening device (200) and by means of which the second fastening device (200) is guided linearly movable relative to the first fastening device (100) in a sagittal guide plane (E) along a longitudinally extended circular arc guide track (C), a first linear guide (400) by means of which the circular arc guide (300) is connected at one end to the first fastening device (100) and is guided linearly movable relative to the same in the guide plane (E) along an anteroposteriorly longitudinally extended first guide track (L1), and a second linear guide (500), by means of which the second fastening device (200) is connected at the other end to the circular arc guide (300) and is guided linearly movable relative to the same in the guide plane (E) along an anteroposteriorly longitudinally extended second guide track (L2).

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