Survivorship of a low-stiffness extensively porous-coated femoral stem at 10 years.
A novel low-stiffness extensively porous-coated total hip femoral component was designed to achieve stable skeletal fixation, structural durability, and reduced periprosthetic femoral stress shielding. In short- to intermediate-term clinical review, this implant achieved secure biologic fixation and preserved periprosthetic bone. We retrospectively reviewed all 102 prospectively followed patients (106 implants) with this implant to document the longer-term implant survivorship, clinical function, fixation quality, and periprosthetic bone preservation. Ninety-seven patients with 101 implants had current followup or were followed to patient death (range, 1-14 years; average, 10 years). Eighty-six living patients were followed for an average implant survivorship of 10 years. There were no known femoral implant removals. The average Harris hip score at 10-year followup was 98. Radiographs demonstrated secure implant fixation and maintenance of periprosthetic bone. These data suggest this implant design provided long-term function characterized by extensive fixation, structural durability, and radiographic appearance of maintained periprosthetic cortical thickness and density.


METHODS
Level I, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.
Hartzband
Mark A
MA
Hartzband Center for Hip and Knee Replacement, Paramus, NJ, USA.
Glassman
Andrew H
AH
Goldberg
Victor M
VM
Jordan
Louis R
LR
Crowninshield
Roy D
RD
Fricka
Kevin B
KB
Jordan
Louis C
LC
D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation*; D015519:Bone Density; D020099:Coated Materials, Biocompatible; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D010146:Pain / Q000209:etiology / Q000517:prevention & control; D010147:Pain Measurement; D016062:Porosity; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D020127:Recovery of Function; D012189:Retrospective Studies; D013314:Stress, Mechanical; D013499:Surface Properties; D013848:Thigh; D013997:Time Factors; D014025:Titanium; D016896:Treatment Outcome; D014481:United States; D014800:Vitallium
D020099:Coated Materials, Biocompatible; C101914:titanium fiber; D014800:Vitallium; D014025:Titanium