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Second-generation Extensively Porous-coated THA Stems at Minimum 10-year Followup

  • Symposium: Papers Presented at the Annual Closed Meeting of the International Hip Society
  • Published:
Clinical Orthopaedics and Related Research®

Abstract

The relatively high prevalence of thigh pain and stress shielding associated with the AML porous-coated cementless femoral component led to the development of the Prodigy®, a femoral component with more extensive porous-coating and a distal polished bullet tip with medial diaphyseal relief to potentially decrease the flexural rigidity. We prospectively evaluated a cohort of 100 consecutive cementless total hip arthroplasties performed using this device. The minimum followup was 10 years (mean, 11.4 years; range, 10–12 years). At 10-year followup, 69 of the 86 patients (82 hips) were living, 14 patients with 15 hips were deceased, and three patients with three hips were lost to followup. No hips required a stem revision. Two patients (two hips) complained of thigh pain. All hips were bone ingrown. Distal tip radiolucencies and osteolysis occurred in 13 hips (17%) and none, respectively. Twenty-one hips (28%) demonstrated moderate or severe stress shielding. Only further followup will determine if this could be a clinical problem or one with revision surgery. These results encourage the authors to continue using second-generation extensively coated stems in their primary total hip arthroplasty constructs.

Level of Evidence: Level III, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.

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Acknowledgments

We thank Rhonda Chalus, RN, for her work in helping to complete this study.

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Authors and Affiliations

  1. Department of Orthopaedics, University of Iowa Health Care, Iowa City, IA, 52242, USA

    David W. Hennessy BS, John J. Callaghan MD & Steve S. Liu MD

  2. VA Hospital Administration, Iowa City, IA, USA

    John J. Callaghan MD

Authors
  1. David W. Hennessy BS
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  2. John J. Callaghan MD
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  3. Steve S. Liu MD
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Corresponding author

Correspondence to John J. Callaghan MD.

Additional information

One of the authors (JJC) has received royalties and consulting fees from DePuy (Warsaw, IN), a Johnson & Johnson company.

Each author certifies that his institution has approved the reporting of these cases, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained.

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Hennessy, D.W., Callaghan, J.J. & Liu, S.S. Second-generation Extensively Porous-coated THA Stems at Minimum 10-year Followup. Clin Orthop Relat Res 467, 2290–2296 (2009). https://doi.org/10.1007/s11999-009-0831-9

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  • DOI: https://doi.org/10.1007/s11999-009-0831-9

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