Bone response to a novel highly porous surface in a canine implantable chamber

  • Frenkel S
  • Jaffe W
  • Dimaano F
 et al. 
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Abstract

Long-term survival of uncemented hip components is dependent upon successful biological fixation. This study examined a new prosthetic surface treatment consisting of a highly porous open structure of commercially pure titanium, Tritanium? Dimensionalized Metal; its overall porosity is approximately 65-70%. With the use of an implantable chamber in dogs, the effects of this treatment on bone ingrowth and strength of attachment were compared to both titanium (overall porosity of 30-35%) and cobalt chrome beads (overall porosity of 35-40%), with and without hydroxyapatite coating. At 6 and 12 weeks, chambers were explanted and specimens underwent high-resolution radiographic imaging and mechanical testing. At 12 weeks, Tritanium surfaces had greater bone penetration and tensile strength than remaining surface types. Over 40% of the Tritanium specimens had a tensile strength greater than 500 N, exceeding the testing capability of the servohydraulic equipment. The highly porous Tritanium surfaces allow for a far greater amount of bone ingrowth than beaded surfaces, and may create a geometry that enhances mechanical strength. Tritanium? Dimensionalized Metal surface treatment may result in a clinically valuable implant fixation surface to induce rapid ingrowth and a strong bone-implant interface, contributing to increased implant survivorship. © 2004 Wiley Periodicals, Inc.

Author-supplied keywords

  • Alloys
  • Animal model
  • Animals
  • Biocompatible
  • Biomechanics
  • Bone
  • Bone Development
  • Bone-implant interfaces
  • Coated Materials
  • Cobalt
  • Culture
  • Diffusion Chambers
  • Dogs
  • Durapatite
  • Electron
  • Experimental
  • Femur
  • Hip prostheses
  • Hydraulic equipment
  • Implant design
  • Implants
  • Implants (surgical)
  • Mechanical
  • Microscopy
  • Porosity
  • Radiography
  • Scanning
  • Servo-hydraulic equipments
  • Stress
  • Surface Properties
  • Surface treatment
  • Tensile strength
  • Titanium
  • animal experiment
  • article
  • biocompatibility
  • bone growth
  • bone regeneration
  • chromium
  • comparative study
  • controlled study
  • dog
  • fracture fixation
  • hip prosthesis
  • hydroxyapatite
  • implantation
  • integration
  • material coating
  • mechanical stress
  • nonhuman
  • prosthesis

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Authors

  • S R Frenkel

  • W L Jaffe

  • F Dimaano

  • K Iesaka

  • T Hua

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