Biomechanical research of antegrade intramedullary fixation for the metacarpal fractures / 中华外科杂志
Chinese Journal of Surgery
;
(12): 606-609, 2010.
Artigo
em Chinês
| WPRIM
| ID: wpr-254748
ABSTRACT
<p><b>OBJECTIVE</b>To study the biomechanical characteristics of antegrade intramedullary fixation for metacarpal fractures.</p><p><b>METHODS</b>From March to May 2008, both the 4th and 5th metacarpals from 25 formalin embalmed cadaver hands had three-point bending test after transverse osteotomy followed by randomly fixation with one of the following three methods:
plate and screw, antegrade intramedullary K-wire, crossed K-wire. While, both the 2nd and 3rd metacarpals had torsional loading test after the same management as the 4th and 5th metacarpal had undergone.</p><p><b>RESULTS</b>In the three-point bending test, both the maximum bending moment (M(max)) and bending rigidity (EI) of the antegrade intramedullary K-wire were comparable with those of the plate and screw, and were significantly larger than those of the crossed K-wire. In the torsional loading test, the antegrade intramedullary K-wire had a statistically smaller maximum torque (T(max)) than the plate and screw, and had a comparable T(max) with the crossed K-wire; while, the torsional rigidity (GJ) of the intramedullary K-wire was statistically weaker than that of both the plate and screw and the crossed wire.</p><p><b>CONCLUSIONS</b>One single antegrade intramedullary K-wire can provide a satisfactory M(max) and EI for metacarpal fixation and shows relatively weak in the torsional loading test. The injured finger should be well protected to avoid torsional deformity in clinical practice.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Osteotomia
/
Cirurgia Geral
/
Ferimentos e Lesões
/
Fenômenos Biomecânicos
/
Placas Ósseas
/
Parafusos Ósseos
/
Fios Ortopédicos
/
Cadáver
/
Ossos Metacarpais
/
Fraturas Ósseas
Limite:
Adulto
/
Humanos
Idioma:
Chinês
Revista:
Chinese Journal of Surgery
Ano de publicação:
2010
Tipo de documento:
Artigo
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