Componentes acetabulares cementados primarios en caderas con displasia …(I)

"Componentes acetabulares cementados primarios en caderas con displasia de desarrollo severo o luxación total."

Brett J. Hampton, MD1 and William H. Harris, MD2 1 Department of Orthopedics and Rehabilitation, Walter Reed Army Medical Center, 6900 Georgia Avenue, N.W., Washington, DC 20307 2 Harris Orthopaedic Biomechanics and Biomaterials Laboratory, Massachusetts General Hospital, 55 Fruit Street, GRJ 1126, Boston, MA 02114. E-mail address: wharris.obbl@partners.org

We previously reported the seven-year results of the use of a hemispherical, porous-coated acetabular component in twenty consecutive primary total hip arthroplasties in a highly selected group, namely, patients with severe developmental dysplasia or total dislocation of the hip. The present report describes the outcomes of those hips nine years later, at an average follow-up of sixteen years (range, 11.5 to nineteen years). Since the time of our prior report, two shells were revised; one revision was done because of aseptic loosening and the other, because of polyethylene liner dissociation without tine fracture. The remaining shells were well fixed. No pelvic osteolysis was evident on plain radiographs. The average polyethylene liner wear rate was 0.09 mm/yr. With failure defined as aseptic loosening of the shell, the average sixteen-year survival for the shell was 92%. We believe that this cup had excellent fixation at a long duration of follow-up of sixteen years in this highly selected set of patients with difficult hip problems.

J Bone Joint Surg Am. 1999;81:347-54.