Dynamizations and Exchanges: Success Rates and Indications

Jody Litrenta, Paul Tornetta, Heather Vallier, Reza Firoozabadi, Ross Leighton, Kenneth Egol, Christiane Kruppa, Clifford B. Jones, Cory Collinge, Mohit Bhandari, Emil Schemitsch, David Sanders, Brian Mullis

Research output: Contribution to journalArticle

18 Scopus citations


Objective: To characterize the timing, indications, and "success rates of secondary interventions, dynamization and exchange nailing, in a large series of tibial nonunions" (dynamization and exchange nailing are types of secondary interventions). Setting: Retrospective multicenter analysis from level 1 trauma hospitals. Patients: A total of 194 tibia fractures that underwent dynamization or exchange nailing for delayed/nonunion. Intervention: Records and radiographs to characterize demographic data, fracture type, and cortical contact after tibial nailing were gathered. The radiographic union score for tibias (RUST) and the timing of intervention and time to union were calculated. Main Outcome Measures: The primary outcome was success of either intervention, defined as achieving union, with the need for further intervention defining failure. Other outcomes included RUST scores at intervention and union, and timing to intervention and union for both techniques. Two-tailed t tests and Fisher exact with P set at

Original languageEnglish (US)
Pages (from-to)569-573
Number of pages5
JournalJournal of Orthopaedic Trauma
Issue number12
StatePublished - Dec 1 2015


  • dynamization
  • exchange nail
  • tibial delayed union
  • tibial nonunion

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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    Litrenta, J., Tornetta, P., Vallier, H., Firoozabadi, R., Leighton, R., Egol, K., Kruppa, C., Jones, C. B., Collinge, C., Bhandari, M., Schemitsch, E., Sanders, D., & Mullis, B. (2015). Dynamizations and Exchanges: Success Rates and Indications. Journal of Orthopaedic Trauma, 29(12), 569-573. https://doi.org/10.1097/BOT.0000000000000311