Fracture Healing Times

Upper Extremity

Callus formation: 2-3 weeks

Union: 4-6 weeks

Lower Extremity

Callus formation: 2-3 weeks

Union: 8-12 weeks

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• 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