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The Journal of Bone and Joint Surgery 81:280-291 (1999)
© 1999 The Journal of Bone and Joint Surgery, Inc.

Instructional Course Lecture

Instructional Course Lectures, The American Academy of Orthopaedic Surgeons - Total Acetabular Allografts*{dagger}

WAYNE G. PAPROSKY, M.D.{ddagger}, WINFIELD, ILLINOIS and TODD D. SEKUNDIAK, M.D., F.R.C.S.(C)§, WINNIPEG, MANITOBA, CANADA

An Instructional Course Lecture, American Academy of Orthopaedic Surgeons


   Introduction
 
Although the number of total hip arthroplasty procedures has remained relatively constant in the last few years, the prevalence of these implants in the general population is increasing because of the longer life spans of the patients. Thus, these implants are subjected to the stresses resulting from increased levels of activity for longer periods of time. Mechanisms of failure include infection, instability, wear, loosening, and fracture9,29,31,37.

Historically, the use of a press-fit, porous ingrowth implant has provided the best results after revision acetabular arthroplasties, irrespective of the mode of failure5,9,21,23,26,27,29,31,34,37,38,42,44. Wear and loosening of the implant are the most common causes of failure. These modes of failure are of concern as wear and its associated osteolytic process tend to precede loosening and consequent symptoms. Patients therefore may delay medical attention until bone loss becomes massive. It is essential to quantitate the amount of bone loss as this determines . . . [Full Text of this Article]


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