Orthopaedic surgical instrument system and a method of trialing an orthopaedic prosthetic assembly
AssigneeDepuy Ireland Unlimited Company
InventorsNathan C. Reeder, Aaron J. Matyas, Lauren A. Ferris
Life of this patent
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Abstract
An orthopaedic surgical instrument system includes a hinged tibial insert trial and a tibial base trial. A post adapter is sized to be positioned over a post of the tibial base trial and to be positioned in a central opening defined in the hinged tibial insert trial. The hinged tibial insert trial includes a housing configured to be received in a femoral component and a button mechanism to selectively secure the hinged tibial insert trial to the femoral component. The system may include a shim trial sized to be attached to an inferior surface of the hinged tibial insert trial.
Claims10
An orthopaedic surgical instrument comprising:
- a hinged tibial insert trial comprising:
- an inferior surface configured to confront a superior surface of a tibial base trial;
- a pair of curved surfaces positioned opposite the inferior surface;
- a central opening defined in the inferior surface;
- a spine positioned between the pair of curved surfaces;
- and
- a housing hingedly coupled to the spine and including a button mechanism having an elongated plunger pin having a first end that selectively extends out of the housing, wherein the button mechanism is operable to retract the first end of the elongated plunger pin within the housing.
A method of assembling a surgical instrument system, the method comprising:
- clipping a base post adapter onto a post of a tibial base trial, wherein the tibial base trial is positioned on a proximal end of a patient's tibia;
- placing a hinged tibial insert trial on the base post adapter in response to clipping the base post adapter;
- positioning the patient's knee joint in less than about 45 degrees of flexion in response to placing the hinged tibial insert trial;
- depressing a button mechanism of the hinged tibial insert trial causing retraction of a plunger pin;
- inserting a housing of the hinged tibial insert trial into a femoral box defined in a femoral component through a gap defined between a pair of curved surfaces of the femoral component while depressing the button mechanism and in response to positioning the patient's knee joint;
- and
- releasing the button mechanism in response to inserting the housing.
Dependencies are inferred from the claim text.