Customized patient-specific acetabular orthopaedic surgical instrument and method of use and fabrication

摘要

A customized patient-specific orthopaedic instrument for facilitating implantation of an acetabular cup prosthesis in a coxal bone of a patient includes a customized patient-specific acetabular reaming guide. The customized patient-specific acetabular reaming guide includes a longitudinal passageway for an acetabular reamer and a plurality of arms with attached feet. Each foot of the reaming guide is positioned relative to the body based on the contours of the coxal bone of the patient and a predetermined degree of version and inclination angles of the acetabular cup prosthesis when implanted in the patient's coxal bone.

主权项

1. A customized patient-specific orthopaedic instrument for facilitating implantation of an acetabular cup prosthesis in a coxal bone of a patient, the customized patient-specific orthopaedic instrument comprising:
a customized patient-specific acetabular reaming guide comprising a single monolithic component including (i) a body having a longitudinal passageway defined therethrough, (ii) a plurality of arms extending from the body, and (iii) a plurality of feet configured to contact a coxal bone of a patient, each foot of the plurality of feet being coupled to a corresponding arm of the plurality of arms, an acetabular reamer surgical tool configured to ream the patient's acetabulum, the acetabular reamer surgical tool including a body positioned in the longitudinal passageway of the customized patient-specific acetabular reaming guide and secured thereto, wherein (i) each foot of the plurality of feet is non-movably fixed relative to the body based on (i) a predetermined degrees of version and inclination angles of the acetabular cup prosthesis when implanted in the patient's coxal bone, (ii) each foot of the plurality of feet includes a longitudinal passageway defined therein that is sized to receive a bone guide pin, and (iii) each foot of the plurality of feet includes a bottom, bone-facing surface having a customized patient-specific negative contour configured to receive a portion of the patient's coxal bone surrounding the patient's acetabulum having a corresponding positive contour, the customized patient-specific negative contour of each foot being unique relative to the customized patient-specific negative contour of every other foot to orient the acetabular reamer surgical tool at the predetermined degree of version and inclination angles when the customized patient-specific acetabular reaming guide is engaged with the patient's coxal bone.