The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2018
Filed:
Feb. 14, 2006
Stephen H. Hoag, Warsaw, IN (US);
Dale A. Degroff, Warsaw, IN (US);
Douglas H. Wentz, Winona Lake, IN (US);
Leslie N. Gilbertson, Warsaw, IN (US);
Roy D. Crowninshield, Fort Wayne, IN (US);
Stephen H. Hoag, Warsaw, IN (US);
Dale A. Degroff, Warsaw, IN (US);
Douglas H. Wentz, Winona Lake, IN (US);
Leslie N. Gilbertson, Warsaw, IN (US);
Roy D. Crowninshield, Fort Wayne, IN (US);
Zimmer, Inc., Warsaw, IN (US);
Abstract
A prosthetic hip stem for use in a prosthetic hip joint. The hip stem generally includes a core having a stem portion and a neck portion, a polymer matrix layer substantially covering the stem portion of the core, and a porous metal layer substantially covering the polymer matrix layer. The polymer matrix layer connects the core and the porous metal layer, and may be injection molded therebetween. The neck portion of the hip stem has a relatively thin or slender profile which allows for an increased degree of articulating movement of the hip stem with respect to the acetabular component of a prosthetic hip joint. The neck portion of the hip stem additionally includes a version indicator element, such as a bump or a protrusion, which may be tactilely felt by a surgeon to aid the surgeon in positioning the hip stem during a minimally invasive total hip arthroplasty procedure, for example, where direct visualization of the hip stem by the surgeon may not be possible. Additionally, the core of the hip stem includes grooves, ridges, flats, dimples or other features to enhance the mechanical interconnection between the core and the polymer matrix layer.