Validation of a micro-CT technique for measuring volumetric wear in retrieved acetabular liners.

In this study, a novel micro-CT-based technique for evaluating wear in retrieved acetabular liners was introduced and validated. Six UHMWPE acetabular components ranging in implantation time from 2.7 to 14.4 years were collected and evaluated with the use of a high-resolution micro-CT scanner. The components were scanned with a uniform volumetric resolution of 74 microns (16-bit precision) with the use of a 1,024 x 1,024 in-plane image matrix. Manual rigid 3D image registration of the interior hemispherical portion of the acetabular cup with geometric primitives by trained observers allowed for isolation, visualization, and measurement of the wear volume. Results for these six components indicated an average wear rate of 65 mm(3)/year. Overall scanner error was quantified gravimetrically and associated with a maximum uncertainty of 0.6%. Intra-- and interobserver uncertainty analysis showed the method to be both accurate and repeatable.

[1]  A. Wang,et al.  Analysis of a retrieved UHMWPE acetabular cup crosslinked in air with 1000 kGy of gamma radiation , 2004, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[2]  Jove Graham,et al.  Wear and surface cracking in early retrieved highly cross-linked polyethylene acetabular liners. , 2004, The Journal of bone and joint surgery. American volume.

[3]  Xunhua Yuan,et al.  Comparison of two digital radiostereometric analysis methods in the determination of femoral head penetration in a total hip replacement phantom , 2004, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[4]  C. Engh,et al.  Sterilization and polyethylene wear: clinical studies to support laboratory data. , 2004, The Journal of bone and joint surgery. American volume.

[5]  Steven M. Kurtz,et al.  The UHMWPE Handbook: Ultra-High Molecular Weight Polyethylene in Total Joint Replacement , 2004 .

[6]  M. Silva,et al.  Short-term in vivo wear of cross-linked polyethylene. , 2004, The Journal of bone and joint surgery. American volume.

[7]  V. Goldberg,et al.  Evaluation of contemporary software methods used to quantify polyethylene wear after total hip arthroplasty. , 2003, The Journal of bone and joint surgery. American volume.

[8]  S. Incavo,et al.  Clinical performance of a highly cross-linked polyethylene at two years in total hip arthroplasty: a randomized prospective trial. , 2003, The Journal of arthroplasty.

[9]  D. D’Lima,et al.  Polyethylene cross‐linking by two different methods reduces acetabular liner wear in a hip joint wear simulator , 2003, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[10]  I. Clarke,et al.  Wear mode and wear mechanism of retrieved acetabular cups , 2003, International Orthopaedics.

[11]  Joshua Jacobs,et al.  Comparison of Two and Three-Dimensional Computerized Polyethylene Wear Analysis After Total Hip Arthroplasty , 2003, The Journal of bone and joint surgery. American volume.

[12]  R. Bourne,et al.  Validation of Two and Three-Dimensional Radiographic Techniques for Measuring Polyethylene Wear After Total Hip Arthroplasty , 2003, The Journal of bone and joint surgery. American volume.

[13]  S. Affatato,et al.  The performance of gamma- and EtO-sterilised UHWMPE acetabular cups tested under severe simulator conditions. Part 1: role of the third-body wear process. , 2002, Biomaterials.

[14]  C. Gerber,et al.  Comparison of polyethylene wear with femoral heads of 22 mm and 32 mm. A prospective, randomised study. , 2002, The Journal of bone and joint surgery. British volume.

[15]  Charles A. Engh,et al.  A Clinically Practical Method of Manually Assessing Polyethylene Liner Thickness , 2001, The Journal of bone and joint surgery. American volume.

[16]  R. Barrack,et al.  Radiographic wear measurements in a cementless metal-backed modular cobalt-chromium acetabular component. , 2001, The Journal of arthroplasty.

[17]  M. Raimondi,et al.  A method for the evaluation of the change in volume of retrieved acetabular cups , 2000, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[18]  T. Bauer,et al.  Polyethylene wear vector in vivo: A three‐dimensional analysis using retrieved acetabular components and radiographs , 1999, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[19]  M Thomsen,et al.  [An optical method for determining deformation and form changes in polyethylene surfaces of explanted acetabular cups of hip endoprostheses]. , 1999, Biomedizinische Technik. Biomedical engineering.

[20]  C. Engh,et al.  Two-dimensional versus three-dimensional radiographic measurements of polyethylene wear. , 1999, Clinical orthopaedics and related research.

[21]  A Unsworth,et al.  A comparison between gravimetric and volumetric techniques of wear measurement of UHMWPE acetabular cups against zirconia and cobalt-chromium-molybdenum femoral heads in a hip simulator , 1999, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[22]  P. Fulford.  Electronic publishing--the next steps. , 1997, The Journal of bone and joint surgery. British volume.

[23]  W H Harris,et al.  Wear of Polyethylene Acetabular Components in Total Hip Arthroplasty. An Analysis of One Hundred and Twenty-eight Components Retrieved at Autopsy or Revision Operations* , 1997, The Journal of bone and joint surgery. American volume.

[24]  B. Wroblewski,et al.  Measurement of Wear in Retrieved Acetabular Sockets , 1995, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[25]  J. Charnley,et al.  Rate of wear in total hip replacement. , 1975, Clinical orthopaedics and related research.

[26]  S. Kurtz,et al.  Crosslinked and thermally treated ultra-high molecular weight polyethylene for joint replacements , 2004 .

[27]  V. Saikko,et al.  Wear of conventional and cross-linked ultra-high-molecular-weight polyethylene acetabular cups against polished and roughened CoCr femoral heads in a biaxial hip simulator. , 2002, Journal of biomedical materials research.