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Non-Destructive Testing of Ceramic Knee Implants Using Micro-Computed Tomography.

Klemens Trieb1, Jonathan Glinz2, Michael Reiter2

  • 1Computed Tomography Research Group, University of Applied Sciences Upper Austria, Wels, Austria; Department of Orthopaedics, Klinikum Wels-Grieskirchen, Wels, Austria.

The Journal of Arthroplasty
|June 16, 2019
PubMed
Summary
This summary is machine-generated.

X-ray micro-computed tomography (XCT) successfully inspected metal-free ceramic knee implants for defects. This non-destructive testing method is crucial for ensuring the quality of advanced orthopedic implants.

Keywords:
burstceramicfemurnon-destructive testingstrengthtibia

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Area of Science:

  • Biomaterials Science
  • Medical Imaging
  • Orthopedic Surgery

Background:

  • Increasing knee replacement surgeries lead to more revision cases.
  • Complications like implant loosening necessitate advanced solutions.
  • Metal-free ceramic implants, such as zirconium dioxide (ZrO2), offer a promising alternative due to their strength.

Purpose of the Study:

  • To establish a non-destructive testing protocol for ceramic knee implants using X-ray micro-computed tomography (XCT).
  • To assess the feasibility of XCT for inspecting high-density ceramic components.
  • To optimize scanning parameters and artifact reduction for accurate defect detection.

Main Methods:

  • Investigated 16 ceramic knee implants (8 tibial, 8 femoral) using industrial XCT at a 100 μm voxel size.
  • Developed a non-destructive testing protocol through CT simulations, optimizing parameters and sample orientation.
  • Applied an iterative artifact reduction procedure for beam hardening correction.

Main Results:

  • Corrected XCT data enabled non-destructive inspection of high-density ceramic implants.
  • No internal defects (pores, cracks) were detected in the investigated samples.
  • XCT provides a 3D representation for inspecting both metal and ceramic knee implants, though artifacts persist.

Conclusions:

  • Beam-hardening corrected XCT data revealed no defects in ceramic femoral and tibial implants.
  • XCT serves as an essential, non-destructive addition to traditional fatigue testing methods.
  • This technique is vital for quality control in advanced orthopedic implant manufacturing.