A phalangeal fracture model—Quantitative analysis of rigidity and failure

James B. Massengill, Harold Alexander, Noshir Langrana, Albert Mylod

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Nine types of internal fixation techniques were tested in 4-point bending using a pig metacarpal model for phalangeal fractures. Levels of bending rigidity and bending moments at failure were determined, and the modes of failure are described. Plate and screw fixation afforded the greatest rigidity, and epiphyseal fractures occurred, leaving intact the test section. Flexible wire loop fixation failed by wire cutting into bone when a square knot was used. Twisted wire unraveled when placed in tension. Depending on the fracture type and the wire placement, Kirschner wires failed either by slipping in the bone, twisting in the bone cortex, or bending at the bone cortex interface. Rigidity varied widely depending on the way in which the wires were employed.

Original languageEnglish (US)
Pages (from-to)264-270
Number of pages7
JournalJournal of Hand Surgery
Volume7
Issue number3
DOIs
StatePublished - 1982

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

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