STP1008: Comparison of Interlocking and Noninterlocking Intramedullary Nails in Bending and Torsion

    Bechtold, JE
    Director of Orthopaedic Biomechanics Laboratory, resident, assistant chief, and chief, Hennepin County and Metropolitan Medical Centers, Minneapolis, MN

    Schaffhausen, JM
    Director of Orthopaedic Biomechanics Laboratory, resident, assistant chief, and chief, Hennepin County and Metropolitan Medical Centers, Minneapolis, MN

    Kyle, RF
    Director of Orthopaedic Biomechanics Laboratory, resident, assistant chief, and chief, Hennepin County and Metropolitan Medical Centers, Minneapolis, MN

    Gustilo, RB
    Director of Orthopaedic Biomechanics Laboratory, resident, assistant chief, and chief, Hennepin County and Metropolitan Medical Centers, Minneapolis, MN

    Pages: 5    Published: Jan 1989


    Abstract

    Two types of interlocking intramedullary (IM) nails and a noninterlocked IM nail were tested in bending and torsion, to compare their flexural stiffness, and torsional stability in a femoral fracture model. A Grosse-Kempf IM nail with proximal and distal cortical interlocking screws, a Brooker-Wills IM nail with proximal interlocking screw and distal cancellous interlocking fins, and a Grosse-Kempf IM nail with no interlocking screws were tested. All IM nails had similar flexural stiffnesses. The interlocked Grosse-Kempf IM nail was most stable in torsion, followed by the interlocked Brooker-Wills IM nail. The noninterlocked Grosse-Kempf IM nail was least stable in torsion.

    Keywords:

    intramedullary nail, interlocked intramedullary nail, bending stiffness, torsional stability, Grosse-Kempf, Brooker-Wills


    Paper ID: STP10368S

    Committee/Subcommittee: F04.02

    DOI: 10.1520/STP10368S


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