Dynamization of the plate in treating nonunion of the tibial fracture: Case report

Background: Plate osteosynthesis for the tibial fracture is one of the alternative treatments with satisfactory outcomes. Appropriate surgical techniques, including an open or minimally invasive approach, absolute or relative stability regarding fracture characteristics, and construct stiffness, could lead to proper fracture healing. However, in some circumstances the nonunion might be a problem. The treatment of the healing disturbance is challenging as more complex procedures, such as compression plating, bone grafting, or conversion to nailing, are considered. Dynamization, which aims to optimize the rigidity of the construct, was an alternative to stimulate bone healing. Case: We present two cases of tibial nonunion following open reduction internal fixation (ORIF) with plating. The dynamization concept by percutaneously removing screws close to the fracture site to reduce fixation stiffness for appropriate relative stability, promote callus formation, and facilitate fracture healing without additional bone grafting. This simple procedure could be an alternative option in selected healing problem cases. Conclusion: These cases highlight the importance of considering fixation construct rigidity in fracture management. Too rigid fixation with a simple fracture gap or in comminuted fracture led to delayed healing. Dynamization of plating should be considered when delayed healing is related to the fixation construct's stiffness. Screw removal, as demonstrated in this case report, can be done under local anesthesia as a simple procedure to stimulate fracture healing before more complex surgical options. However, individualized analysis of nonunion causes is essential for successful bone healing.