Theoretical relationships between component design, patient bone geometry and range-of-motion post hip resurfacing

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
Peter Ellison

Abstract

Clinical studies indicate that range of motion until prosthetic impingement is important in understanding unexplained failures of hip resurfacings, yet the underlying biomechanical principles have received little attention. This study investigates the mathematical relationships between component design, position, patient bone geometry and range of motion in hip resurfaced prostheses. Variations in range of motion and impingement-free safe-zones for cup position were calculated using an established method of vector analysis that facilitated parametric analysis in a time efficient manner. The alpha angle, defined as the angle between the centreline of the femoral neck and the waist of the femoral head/neck junction, was used to represent the natural femoral neck. Range of motion and impingement-free safe-zones were inversely proportional to the alpha angle and cup inclusion angle. The size of the safe-zone was most sensitive to the alpha angle with a 6 degrees reduction, decreasing the range of cup positions without impingement by 80-100%. Lowering the upper limit of cup inclination from 55 degrees to 45 degrees reduced the range of cup positions that allow impingement-free motion by 47-94%. No common safe-zone was observed for t...Continue Reading

References

Nov 1, 1965·The British Journal of Radiology·R O Murray
Jan 1, 1997·The Journal of Bone and Joint Surgery. British Volume·R P RobinsonR P Ching
Mar 21, 2000·The Journal of Bone and Joint Surgery. American Volume·D D D'LimaC W Colwell
May 31, 2001·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·S L SmithA A Goldsmith
Jun 5, 2002·The Journal of Bone and Joint Surgery. British Volume·H P NötzliJ Hodler
Jun 8, 2002·Journal of Biomechanics·Fumihiro Yoshimine, Ko Ginbayashi
Jun 9, 2004·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·K-H Widmer, B Zurfluh
Jan 30, 2007·The Journal of Bone and Joint Surgery. British Volume·P E BeauléF J Dorey
Sep 18, 2007·Clinical Biomechanics·Pascal-André VendittoliMartin Lavigne
Sep 2, 2008·The Journal of Bone and Joint Surgery. British Volume·R De HaanK A De Smet
Oct 2, 2008·The Journal of Bone and Joint Surgery. British Volume·R De HaanK De Smet
Nov 22, 2008·Clinical Orthopaedics and Related Research·Marcel DuddaMartin Beck
Dec 17, 2008·Acta Orthopaedica·Guillaume MabilleauAfsie Sabokbar
Apr 14, 2009·Clinical Orthopaedics and Related Research·Ian J LeslieJohn Fisher
Jul 29, 2010·Archives of Orthopaedic and Trauma Surgery·Gavin J Macpherson, Steffen J Breusch
Aug 3, 2010·The Journal of Bone and Joint Surgery. British Volume·G GrammatopoulosD W Murray
Nov 3, 2010·The Journal of Bone and Joint Surgery. British Volume·G GrammatopoulosH S Gill

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