understanding why metal-on-metal hip arthroplasties fail by alister j. hart, ashley matthies, johann...

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Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble J Bone Joint Surg Am Volume 94(4):e22 February 15, 2012 ©2012 by The Journal of Bone and Joint Surgery, Inc.

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Page 1: Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

Understanding Why Metal-on-Metal Hip Arthroplasties Fail

by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

J Bone Joint Surg AmVolume 94(4):e22February 15, 2012

©2012 by The Journal of Bone and Joint Surgery, Inc.

Page 2: Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

Graph showing the rank order (expressed as a percentage) of each patient according to acetabular cup inclination angle.

Alister J. Hart et al. J Bone Joint Surg Am 2012;94:e22

©2012 by The Journal of Bone and Joint Surgery, Inc.

Page 3: Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

Graph showing the rank order (expressed as a percentage) of each patient according to acetabular cup version angle.

Alister J. Hart et al. J Bone Joint Surg Am 2012;94:e22

©2012 by The Journal of Bone and Joint Surgery, Inc.

Page 4: Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

Scatter plot showing the orientation of each acetabular cup.

Alister J. Hart et al. J Bone Joint Surg Am 2012;94:e22

©2012 by The Journal of Bone and Joint Surgery, Inc.

Page 5: Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

Graph showing the rank order (expressed as a percentage) of each patient according to the whole blood (WB) metal ion levels.

Alister J. Hart et al. J Bone Joint Surg Am 2012;94:e22

©2012 by The Journal of Bone and Joint Surgery, Inc.

Page 6: Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

Graph showing the rank order (expressed as a percentage) of each patient in the revision group according to component wear rate.

Alister J. Hart et al. J Bone Joint Surg Am 2012;94:e22

©2012 by The Journal of Bone and Joint Surgery, Inc.

Page 7: Understanding Why Metal-on-Metal Hip Arthroplasties Fail by Alister J. Hart, Ashley Matthies, Johann Henckel, Kevin Ilo, John Skinner, and Philip C. Noble

Scatter plot showing the logarithms of the metal ion levels and wear rate for each patient who underwent revision because of unexplained hip pain.

Alister J. Hart et al. J Bone Joint Surg Am 2012;94:e22

©2012 by The Journal of Bone and Joint Surgery, Inc.

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