The Journal of Bone and Joint Surgery, Vol 75, Issue 6 814-824, Copyright © 1993 by Journal of Bone and Joint Surgery, Inc

JOURNAL CONTENTS

Histological and radiographic assessment of well functioning porous-coated acetabular components. A human postmortem retrieval study

CA Engh, KF Zettl-Schaffer, Y Kukita, D Sweet, M Jasty and C Bragdon
Anderson Orthopaedic Research Institute, Arlington, Virginia 22206.

Nine porous-coated acetabular components were retrieved post mortem. All components had been inserted at our institution and had been in situ for a mean of fifty months (range, seventeen to eighty-seven months). Clinical records revealed that all had been functioning well at the time of death, and clinical radiographs showed signs that all had been stable. Standard backscattered scanning electron microscopy was used to quantitate the amount of bone ingrowth into the porous coating. For each component, the histological appearance of the bone-metal interface was compared with the appearance on clinical radiographs. Light microscopy was used to study the non-ossified areas. Every component had growth of bone into the porous coating, with the ingrowth occupying a mean of 32 per cent (range, 3 to 84 per cent) of the fields that were examined. In areas where bone ingrowth had occurred, the mean area density was 48 per cent (range, 26 to 65 per cent). Use of radiographs consistently led to an underestimation of the presence of gap areas and an overestimation of the occurrence of bone apposition. When fibrous tissue was present in non-ossified areas, it was extremely dense and well organized. Within the limits of light microscopic examination, there was no evidence of granulomatous formation in the non-ossified regions. This is particularly encouraging since the fibrous tissue-bone interfaces seem to prohibit the deposit of particulate debris.
CiteULike    Connotea    Del.icio.us    Technorati    What's this?

This article has been cited by other articles:

				B. Levine, C. J. Della Valle, and J. J. Jacobs Applications of Porous Tantalum in Total Hip Arthroplasty J. Am. Acad. Ortho. Surg., November 1, 2006; 14(12): 646 - 655. [Abstract] [Full Text] [PDF]

				G. A. Macheras, P. J. Papagelopoulos, K. Kateros, A. T. Kostakos, D. Baltas, and T. S. Karachalios Radiological evaluation of the metal-bone interface of a porous tantalum monoblock acetabular component J Bone Joint Surg Br, March 1, 2006; 88-B(3): 304 - 309. [Abstract] [Full Text] [PDF]

				Y.-Y. Won, L. D. Dorr, and Z. Wan Comparison of Proximal Porous-Coated and Grit-Blasted Surfaces of Hydroxyapatite-Coated Stems J. Bone Joint Surg. Am., January 1, 2004; 86(1): 124 - 128. [Abstract] [Full Text] [PDF]

				P. Udomkiat, Z. Wan, and L. D. Dorr Comparison of Preoperative Radiographs and Intraoperative Findings of Fixation of Hemispheric Porous-Coated Sockets J. Bone Joint Surg. Am., December 1, 2001; 83(12): 1865 - 1870. [Abstract] [Full Text] [PDF]

				M. T. MANLEY, W. N. CAPELLO, J. A. D'ANTONIO, A. A. EDIDIN, and R. G. T. GEESINK Fixation of Acetabular Cups without Cement in Total Hip Arthroplasty. A Comparison of Three Different Implant Surfaces at a Minimum Duration of Follow-up of Five Years J. Bone Joint Surg. Am., August 1, 1998; 80(8): 1175 - 85. [Abstract] [Full Text]

				R. D. BLOEBAUM, K. N. BACHUS, J. W. JENSEN, D. F. SCOTT, and A. A. HOFMANN Porous-Coated Metal-Backed Patellar Components in Total Knee Replacement. A Postmortem Retrieval Analysis J. Bone Joint Surg. Am., April 1, 1998; 80(4): 518 - 28. [Abstract] [Full Text]

				R. D. BLOEBAUM, N. L. MIHALOPOULUS, J. W. JENSEN, and L. D. DORR Postmortem Analysis of Bone Growth into Porous-Coated Acetabular Components J. Bone Joint Surg. Am., July 1, 1997; 79(7): 1013 - 22. [Abstract] [Full Text]

				R. M. URBAN, J. J. JACOBS, D. R. SUMNER, C. L. PETERS, F. R. VOSS, and J. O. GALANTE The Bone-Implant Interface of Femoral Stems with Non-Circumferential Porous Coating. A Study of Specimens Retrieved at Autopsy J. Bone Joint Surg. Am., July 1, 1996; 78(7): 1068 - 81. [Abstract] [Full Text]