Upper Extremity

Callus formation: 2-3 weeks

Union: 4-6 weeks

Lower Extremity

Callus formation: 2-3 weeks

Union: 8-12 weeks


  • Union has indications for weight bearing
  • Check for MD orders prior to mobilizing

Terms:

  • Stable: clinical union vs. Unstable
  • Displaced: long axis does not align
  • Open vs. closed: whether bone breaks skin