Patent ID: 9737416
Date: 2017-08-22
CPC Classifications: A61B,A61F

Claim:
1. 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 the 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 wherein the parallelogram linkage includes a mount configured to receive the shaft such that the longitudinal axis extends parallel to the alignment axis.