Internal fixation of fractured bones involves metal pins and plating to secure osseous fragments into the correct anatomical postion preventing fragment displacement during the healing process.
Internal fixation with plate and pins of the fibula.
Normal ankle x-ray image
If untreated callus formation and bone healing will occur however, fragments may not realign in correct anatomical position which may result in loss of mobility of the ankle due to disruption at points of osseous articulation caused by the dislocation.
X-ray image showing dislocated tibia and fibular fracture. If left to heal without surgical realignment the bones would begin to heal along current maligned fracture angles.