tailieunhanh - báo cáo hóa học:" A biomechanical study of plate versus intramedullary devices for midshaft clavicle fixation"

A biomechanical study of plate versus intramedullary devices for midshaft clavicle fixation | Journal of Orthopaedic Surgery and Research BioMed Central Research article A biomechanical study of plate versus intramedullary devices for midshaft clavicle fixation S Raymond Golish Jason A Oliviero Eric I Francke and Mark D Miller Open Access Address Department of Orthopaedic Surgery University of Virginia Health System Charlottesville Virginia USA Email S Raymond Golish - sg3vu@ Jason A Oliviero - jao4x@ Eric I Francke - eif2c@ Mark D Miller - mdm3p@ Corresponding author Published 16 July 2008 Received 17 September 2007 Journal of Orthopaedic Surgery and Research 2008 3 28 doi 1749-799X-3-28 Accepted 16 July 2008 This article is available from http content 3 1 28 2008 Golish et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract_ Background Non-operative management of midshaft clavicle fractures is standard however surgical management is increasing. The purpose of this study is to compare the biomechanical performance of plate versus intramedullary fixation in cyclic bending for matched pairs of cadaveric clavicles. We hypothesized that the biomechanical properties are similar. Methods Eight sets of matched clavicles with vertical midshaft osteotomies were prepared from fresh frozen cadavers. A mm dynamic compression plate or a or mm intramedullary device were used for fixation. Clavicles were loaded in a four-point bend at 6 different loads for 3000 cycles at 1 Hz starting with 180 N and increasing by 180 N with sampling at 2 Hz. Failure was defined as 10 mm of displacement or catastrophic construct failure prior to 10 mm of displacement. .