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

  • US 8,992,538 B2
  • Filed: 08/18/2009
  • Issued: 03/31/2015
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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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.

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