FULLY POROUS PROSTHETIC HIP STEM

• Main Authors: CROWNINSHIELD, ROY D, DEGROFF, DALE A, WENTZ, DOUGLAS H, GILBERTSON, LESLIE N, HOAG, STEPHEN H
• Format: Patent
• Language: English; French
• Published: 28.10.2014
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; TREATMENT OR PROTECTION OF EYES OR EARS

A prosthetic hip stem (20) for use in a prosthetic hip joint. The hip stem generally includes a core having a stem portion (22) and a neck portion (24) , a polymer matrix layer substantially covering the stem portion of the core, and a porous metal layer (40) 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 , 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.