Tibial orthopaedic surgical instruments for setting offset

摘要

An orthopaedic surgical instrument assembly is disclosed. The orthopaedic surgical assembly includes a guide tower, an offset tool attached to the guide tower, and a stem trial. A guide tower includes a base surface adapted to be positioned on a proximal end of a patient's tibia and defining a first axis extending through the base surface. The offset tool is configured to rotate about the first axis. The offset tool includes a tool body that is positioned in the guide tower and is integrally formed with a shaft extending through an opening defined in the base surface of the guide tower. The stem trial is removably coupled to a lower end of the shaft.

主权项

1. An orthopaedic surgical instrument assembly, comprising:
a guide tower including a base surface adapted to be positioned on a proximal end of a patient's tibia, the guide tower having a passageway that defines a first axis and extends through an opening defined in the base surface, an offset tool having (i) a tool body including a lower end positioned in the passageway of the guide tower, the tool body being configured to rotate relative to the guide tower, and (ii) a shaft attached to and extending from a lower surface of the tool body, the shaft extending outwardly through the opening defined in the base surface and defining a second axis extending parallel to the first axis, wherein when the orthopaedic surgical instrument assembly is viewed in a transverse plane and the shaft is rotated about the second axis, the tool body is rotated relative to the guide tower and the first axis of the guide tower is moved in a circular path about the second axis, and a stem trial including an elongated body shaped to be positioned in an intramedullary canal of the patient's tibia, the stem trial having an externally-threaded upper end, and the shaft of the offset tool having an internally-threaded lower end that receives the externally-threaded upper end of the stem trial.