This study was undertaken to compare different designs of interlocking and unaugmented intramedullary nails, with respect to their stability in bending and torsion, and their resistance to rotational motion. Embalmed human femora with transverse midshaft fractures were instrumented with the following configurations of intramedullary nails: (1) Gross-Kempf (non-interlocked), (2) Grosse-Kempf (interlocked), and (3) Brooker-Wills. Bending and torsional stiffnesses were determined by loading the femora in four point bending and torsion, respectively, on an electrohydraulic materials testing machine. Bending stiffnesses were similar for the three nail configurations tested. The interlocked Grosse-Kempf nail was able to maintain the largest torque at fixed rotation, and exhibited largest springback, followed by the Brooker-Wills and then the non-interlocked Grosse-Kempf nails.
|Original language||English (US)|
|Number of pages||3|
|State||Published - Dec 1 1986|