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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 ProcterFailures 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 & PhysicsISSN
1350-4533Publisher
ElsevierExternal DOI
Issue
9Volume
22Page range
613-624Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2013-10-03Usage metrics
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