Deformation pattern and load transfer of an uncemented femoral stem with modular necks. An experimental study in human cadaver femurs

Clinical Biomechanics
Cathrine H EnoksenTina Strømdal Wik

Abstract

Modular necks in hip arthroplasty allow variations in neck-shaft angles, neck version and neck lengths and have been introduced to improve accuracy when reconstructing the anatomy and hip joint biomechanics. Periprosthetic bone resorption may be a consequence of stress shielding in the proximal femur after implantation of a femoral stem. The purpose of this study was to investigate the deformation pattern and load transfer of an uncemented femoral stem coupled to different modular necks in human cadaver femurs. A cementless femoral stem was implanted in twelve human cadaver femurs and tested in a hip simulator corresponding to single leg stance and stair climbing activity with patient-specific loading. The stems were tested with four different modular necks; long, short, retro and varus. The long neck was used as reference in statistical comparisons, as it can be considered the "standard" neck. The deformation of bone during loading was measured by strain gauge rosettes at three levels of the proximal femur on the medial, lateral and anterior side. The cortical strains were overall reduced on the medial and lateral side of femur, for all implants tested, and in both loading conditions compared to the unoperated femur. Although ...Continue Reading

References

Mar 1, 1970·Journal of Biomechanics·R D McLeish, J Charnley
May 1, 1997·Journal of Biomedical Materials Research·M VicecontiA Toni
Nov 5, 1998·Journal of Biomechanics·G N DudaL Claes
Jun 19, 2001·Journal of Biomechanics·G BergmannG N Duda
Jul 31, 2001·The Journal of Bone and Joint Surgery. British Volume·A K JanaC A Engh
Feb 15, 2003·The Journal of Bone and Joint Surgery. British Volume·Frank Horan
Mar 5, 2009·The Journal of Bone and Joint Surgery. British Volume·R S KotwalS A Jones
May 2, 2009·The Journal of Bone and Joint Surgery. British Volume·P O ØstbyhaugA Aamodt
May 9, 2009·Orthopaedics & Traumatology, Surgery & Research : OTSR·G LecerfE Stindel
Oct 20, 2009·The Journal of Arthroplasty·Chris J Dangles, Carl J Altstetter
Feb 12, 2010·Acta Orthopaedica·Georg W OmlorPeter Aldinger
Mar 2, 2010·The Journal of Bone and Joint Surgery. British Volume·T S WikA Aamodt
Apr 13, 2010·The Journal of Arthroplasty·Jack G SkendzelAndrew G Urquhart
Jun 27, 2012·The Journal of Bone and Joint Surgery. British Volume·I P S GillR J Beaver
May 3, 2013·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Per Olav ØstbyhaugArild Aamodt
Aug 3, 2013·The Bone & Joint Journal·H KrishnanA J Hart
Oct 23, 2013·World Journal of Orthopedics·Philip S PastidesCharles A Willis-Owen
Apr 4, 2014·Acta Orthopaedica·Jakob van OldenrijkDaniel Haverkamp
Apr 1, 2015·Orthopedics·Francesco FalezMatteo Papalia

❮ Previous
Next ❯

Citations

Aug 10, 2016·Biomedizinische Technik. Biomedical Engineering·Christoph ArndtChristian Voigt
May 31, 2017·International Journal for Numerical Methods in Biomedical Engineering·J C FrameP E Riches
Sep 3, 2017·Archives of Orthopaedic and Trauma Surgery·Andreas FottnerFlorian Schmidutz

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biomechanics

Biomechanics examines the generation of internal forces within the body and investigates the effects and control of forces that act on or are produced on tissues. Here are the latest discoveries.