Influence of cementing the pin on resistance to fracture in hip resurfacing
Background - Since the introduction of modern hip resurfacing systems, there has been a controversy regarding the fixation of the centering pin in the femoral component. It has been suggested that cementing the pin may increase strength of the femoral neck. This in-vitro analysis investigated the in...
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| Hauptverfasser: | , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2011
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| In: |
Clinical biomechanics
Year: 2011, Jahrgang: 26, Heft: 2, Pages: 136-140 |
| ISSN: | 1879-1271 |
| DOI: | 10.1016/j.clinbiomech.2010.09.008 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.clinbiomech.2010.09.008 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0268003310002561 
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| Verfasserangaben: | Ulf J. Schlegel, Jan Siewe, Rudi G. Bitsch, Juergen Koebke, Peer Eysel, Michael M. Morlock |
| Zusammenfassung: | Background - Since the introduction of modern hip resurfacing systems, there has been a controversy regarding the fixation of the centering pin in the femoral component. It has been suggested that cementing the pin may increase strength of the femoral neck. This in-vitro analysis investigated the influence of a cemented, femoral pin on resistance to fracture in the resurfaced hip. - Methods - Five pairs of cadaveric, fresh-frozen femora underwent hip resurfacing (ASR™) using a high viscosity cementing technique. In one side of each pair only the inner surface of the implant was cemented, in the other side, cement was additionally hand-pressurized down the pinhole prior to implantation of the femoral component. Specimen were then mounted on a material testing machine and cyclic loading with increasing load steps was applied until fracture of the femoral neck. - Findings - Fracture load was increased (P=0.013) in the cemented pin group (Median=4200N) when compared with the cementless pin group (Median=2800N). The number of cycles to failure in the group with the cemented pin (Median=8072) was likewise higher (P=0.01) when compared to the group, in which the pin was not cemented (Median=5906). - Interpretation - Cementing the pin may provide additional fixation in hips with low bone mineral density or osteonecrotic lesions, as resistance to fracture could be improved in the presented in-vitro scenario. Although this was shown for a specific hip resurfacing system, this effect might be extrapolated to other, similar implant designs. |
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| Beschreibung: | Available online 8 October 2010 Gesehen am 12.10.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 1879-1271 |
| DOI: | 10.1016/j.clinbiomech.2010.09.008 |