Biomechanical analysis of tension band wiring (TBW) of transverse fractures of patella.
Chin J Traumatol
; 19(5): 255-258, 2016 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-27780503
ABSTRACT
PURPOSE:
Tension band wiring is commonly used for fixation of simple transverse fractures. The popular configuration is parallel Kirschner wires (K-wires) and a stainless steel wire loop placed in a vertically oriented figure-of-8.METHODS:
We used a wooden model of a patella with a midway transverse fracture and compared four different types of fixation. The first construct had a vertical figure-of-8 with one twist of wire. The second contained a vertical figure-of-8 with two twists of wire. The third was a vertical figure-of-8 with two twists of wire placed at adjacent corners while the last one had a horizontal figure-of-8 with two twists of wire placed at adjacent corners. Interfragmentary compression at the point of wire breakage was measured for each construct as well as permanent displacement on cyclic loading.RESULTS:
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 the 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).CONCLUSION:
Placing wire twists at the corner and a horizontal placement of figure-of-8 improves stability of the construct.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Patela
/
Fios Ortopédicos
/
Fraturas Ósseas
/
Fixação Interna de Fraturas
Limite:
Humans
Idioma:
En
Revista:
Chin J Traumatol
Assunto da revista:
TRAUMATOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Reino Unido