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Related Experiment Video

Updated: Jun 27, 2026

Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants
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Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants

Published on: May 14, 2020

[Bone remodeling around cementless tantalum cups].

J-C Grillo1, X Flecher, J Bouvenot

  • 1Service de Chirurgie Orthopédique et de Traumatologie, Hôpital Sainte-Marguerite, Marseille, France. jgrillo@voila.fr

Revue De Chirurgie Orthopedique Et Reparatrice De L'Appareil Moteur
|December 17, 2008
PubMed
Summary

Tantalum cups show promising results in hip replacements, maintaining bone density and potentially preserving bone stock. This study evaluated the bone-implant interface using X-rays and DEXA, finding good clinical outcomes.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Radiology

Context:

  • Cementless cups often lead to decreased periacetabular bone stock one year post-implantation.
  • Tantalum, a relatively new biomaterial, is being investigated for its bone-preserving properties.

Purpose:

  • To evaluate the bone-implant interface of tantalum cups using plain X-rays and dual-energy X-ray absorptiometry (DEXA).
  • To assess periacetabular bone stock changes and implant stability after tantalum cup implantation.

Summary:

  • A retrospective analysis of 42 patients with tantalum cups (Trabecular Metaltrade mark) followed for a minimum of two years.
  • Evaluated clinical scores (Harris score), radiographic parameters (lucent lines, acetabular position), and densitometric bone mineral density (BMD) in periacetabular zones.

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An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
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  • Results showed a mean Harris score of 81, no implant malpositions, 14% lucent lines, and higher BMD (1.290+/-0.309g/cm(2)) compared to typical cementless cups.

    • Impact:

    • Tantalum cups demonstrate clinical and radiographic results comparable to existing literature for correct implant positioning.
    • Higher BMD in Zone 1 suggests improved force transfer to weight-bearing areas, potentially leading to better preservation of pelvic bone stock.
    • Tantalum biomaterial may offer superior force transmission to the iliac bone, contributing to enhanced bone stock preservation.