Introduction: Radial head is an important stabilizer of the elbow. Although preservation of the fractured radial head has biomechanical advantages, comminuted fractures belonging to Mason type III usually do not have satisfactory outcome after osteosynthesis. Excision of the fractured head also often renders the elbow unstable. Therefore, radial head replacement by a prosthesis has been under study as an alternative option. Material and Methods: Seventeen patients with
Mason type III radial head fractures treated by cemented mono-block radial head prosthesis were retrospectively studied. Their clinical and functional outcomes were analysed. Results: Functional results were studied in the 15 available patients using the Mayo Elbow Performance
Score. Seven patients had good or excellent results; six had fair and two had poor outcomes. None had infection, instability, or implant loosening by the end of three years of follow-up. Conclusion: Considering the unpredictable outcomes of osteosynthesis in comminuted radial head fractures, cemented prosthetic replacement using the metallic mono-bloc prosthesis is a viable surgical option in these patients with satisfactory results.

Keywords: Radial head; Comminuted fracture; Prosthesis; Radial head replacement.