Quantitative Ingrowth Analysis of a Porous-coated Acetabular Component in a Canine Model

Authors

  • TERESA D SCHILLER DVM,

    1. Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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  • DAVID J. DEYOUNG dvm, Diplomate ACVS, Diplomate ACVA,

    Corresponding author
    1. Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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  • RICHARD A. SCHILLER,

    1. Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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  • HAROLD A. ABERMAN dvm, mse,

    1. Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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  • DAVID S. HUNGERFORD md

    1. Department of Orthopaedic Surgery, School of Medicine, Johns Hopkins University, Baltimore, Maryland
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Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, 4700 Hillsborough Street, Raleigh, NC 27606

Abstract

Histomorphometric analysis of bone ingrowth into a porous-coated acetabular component was evaluated in a canine model. A total of nine prostheses were evaluated, 3 at 6 months, 3 at 12 months, and 3 at 24 months after implantation. All implants were grossly stable at the time of retrieval. The mean percentage of bone ingrowth was 12% at 6 months, 24% at 12 months, and 24% at 24 months. Narrow radiolucent lines noted on microradiographs were more evident at the 6 month time period than at the 12 or 24 month time periods. Bone ingrowth into a porous-coated acetabular component in a weight-bearing model may continue beyond the 6 month time period, and early evaluation of bone ingrowth may underestimate final bone ingrowth.

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