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Intramedullary femoral nails: one or two lag screws? A preliminary study

journal contribution
posted on 2023-06-08, 15:57 authored by Chang WangChang Wang, C J Brown, A L Yettram, P Procter
Failures of proximal femoral nails that treat unstable femoral fractures have been reported. In this communication, a finite element model to include a proximal femoral nail within a fractured femur was used to carry out preliminary investigations into configurations of single or double lag screws. The effects of the different types of fracture were investigated. The results show that in order to share the load evenly between two lag screws, a good configuration seems to be to have a slightly larger screw above the lower screw. This also ameliorates stresses in the nail at the lag screw insertion holes. However, using two screws in this way can lead to large stresses in the cancellous bone in the femoral head, and these stresses may be significant in the initiation of cut-out.

History

Publication status

  • Published

Journal

Medical Engineering & Physics

ISSN

1350-4533

Publisher

Elsevier

Issue

9

Volume

22

Page range

613-624

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2013-10-03

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