Surgical instrument and method of positioning an acetabular prosthetic component
AssigneeDePuy Synthes Products, Inc.
InventorRodney E. Satterthwaite
Life of this patent
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Abstract
An orthopedic surgical instrument and method for positioning an acetabular prosthetic component in a patient's surgically-prepared acetabulum is disclosed. The orthopedic surgical instrument has a base configured to engage the patient's pelvis, a first linkage pivotally coupled to the base, a locking mechanism operable to lock the first linkage in position relative to the base, and a second linkage removably coupled to the first linkage. The second linkage has an alignment axis corresponding to a desired abduction angle and a desired anteversion angle of the acetabular axis of the acetabular prosthetic component.
Claims8
An orthopaedic surgical instrument for positioning an acetabular prosthetic component in a patient's surgically-prepared acetabulum, the instrument comprising:
- a base including a plurality of mounting legs configured to engage the patient's pelvis,
- a first linkage pivotally coupled to the base, the first linkage including a spirit level,
- a locking mechanism operable to lock the first linkage in position relative to the base,
- a second linkage removably coupled to the first linkage, the second linkage having an alignment axis corresponding to a desired abduction angle and a desired anteversion angle of an acetabular axis of the acetabular prosthetic component, and
- a shaft configured to be secured to the acetabular prosthetic component, the shaft having a longitudinal axis that is coincident with the acetabular axis of the acetabular prosthetic component when the acetabular prosthetic component is secured thereto,
- wherein the second linkage includes a parallelogram linkage configured to maintain the acetabular axis of the acetabular prosthetic component parallel with the alignment axis of the second linkage, and the parallelogram linkage includes a mount configured to receive the shaft such that the longitudinal axis extends parallel to the alignment axis.
An orthopaedic surgical instrument for positioning an acetabular prosthetic component in a patient's surgically-prepared acetabulum, the instrument comprising:
- a base configured to engage the patient's pelvis,
- a first linkage coupled to the base, the first linkage including a gravity-based indicator,
- a locking mechanism operable to lock the first linkage in position relative to the base,
- a second linkage coupled to the first linkage, the second linkage having an alignment axis corresponding to a desired abduction angle and a desired anteversion angle of an acetabular axis of the acetabular prosthetic component, and
- a shaft configured to be secured to the acetabular prosthetic component, the shaft having a longitudinal axis that is coincident with the acetabular axis of the acetabular prosthetic component when the acetabular prosthetic component is secured thereto,
- wherein the second linkage includes a parallelogram linkage configured to maintain the acetabular axis of the acetabular prosthetic component parallel with the alignment axis of the second linkage, and the parallelogram linkage includes a mount configured to receive the shaft such that the longitudinal axis extends parallel to the alignment axis.
Dependencies are inferred from the claim text.