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Erschienen in: International Orthopaedics 5/2007

01.10.2007 | Original Paper

Tension-band wiring of transverse fractures of patella. The effect of site of wire twists and orientation of stainless steel wire loop: a biomechanical investigation

verfasst von: J. John, W. W. Wagner, J. H. Kuiper

Erschienen in: International Orthopaedics | Ausgabe 5/2007

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Abstract

Tension-band wiring is commonly used to treat transverse patella fractures. The most common configuration has parallel Kirschner (K) wires and a stainless steel wire loop placed in a vertically oriented figure of eight. Early mobilisation is important but can cause detrimental displacement at the fracture site. A wooden model of a transversely fractured patella was used to compare different fixation constructs. The fracture was fixed using two K wires and a stainless steel wire loop. One or two wire twists were used, placed either arbitrarily or at corners of the loop. The loop was oriented either vertically or horizontally. Interfragmentary compression at the point of wire breakage and permanent displacement on cyclic loading was measured for each construct. Placement of the figure of eight in a horizontal orientation with two wire twists at the corner improved interfragmentary compression by 63% (p<0.05, Tukey post hoc test). On cyclic loading, all constructs with vertical figure of eight but none with a horizontal construct failed (p=0.01; Fisher’s exact test). Permanent fracture displacement after cyclic loading was 67% lower with horizontal figure of eight constructs (p<0.05; t test). Placing wire twists at the corner and a horizontal placement of figure of eight improves stability of the construct.
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Metadaten
Titel
Tension-band wiring of transverse fractures of patella. The effect of site of wire twists and orientation of stainless steel wire loop: a biomechanical investigation
verfasst von
J. John
W. W. Wagner
J. H. Kuiper
Publikationsdatum
01.10.2007
Verlag
Springer-Verlag
Erschienen in
International Orthopaedics / Ausgabe 5/2007
Print ISSN: 0341-2695
Elektronische ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-006-0238-0

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