Femoral component positioning in resurfacing arthroplasty: Effects on cortical strains

Frederick J. Kummer, Gavin Caesar Pereira, Aaron K. Schachter, William L. Jaffe

Research output: Contribution to journalArticle

Abstract

Previous studies have suggested that femoral component positioning in resurfacing arthroplasty may affect strains in the femoral neck that could lead to decreased implant longevity, A strain gaged, Sawbones® model was used to determine the femoral neck strains for a variety of resurfacing head translations and angulations. We found that head positions affected strain distributions, most positions leading to increased neck strains, often over 100%, with the exception being a varus head position where the superior neck strains decreased over 50%. Although the clinical meaning of these findings is unclear, it could be of concern for stress-shielding or fatigue fracture of the femoral neck.

Original languageEnglish (US)
Pages (from-to)341-346
Number of pages6
JournalBulletin of the NYU Hospital for Joint Diseases
Volume67
Issue number4
StatePublished - 2009
Externally publishedYes

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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