Proximal femoral fractures: a biomechanical study to compare intramedullary and extramedullary fixation

M. J. Curtis, R. H. Jinnah, V. Wilson, B. W. Cunningham

Research output: Contribution to journalArticle

Abstract

This study assesses the rigidity and strength of fixation provided by intramedullary and extramedullary devices for proximal femoral fractures. Stable and unstable intertrochanteric fractures were studied in paired femora after internal fixation with the Gamma nail and Richards 135 ° classic hip-screw implants; in subtrochanteric fractures, the 95 ° Richards condylar screw was studied in addition. Subsidence of the sliding screw within the plate and nail constructs was measured. Fixation of subtrochanteric fractures with the intramedullary Gamma nail was significantly stronger and more rigid than that with the extramedullary screw plate devices. Under conditions of simulated protected weight bearing, the 95 ° condylar screw plate provided more rigid fixation than did the 135 ° hip screw. There was no significant difference in the strength of fixation of stable and unstable intertrochanteric fractures between the Gamma nail and the hip screw, although the Gamma nail provided more rigid fixation.

Original languageEnglish (US)
Pages (from-to)99-104
Number of pages6
JournalInjury
Volume25
Issue number2
DOIs
StatePublished - Mar 1994

ASJC Scopus subject areas

  • Emergency Medicine
  • Orthopedics and Sports Medicine

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