Survival Rates and Patient-Reported Outcomes Support the Use of Custom Cement-Over Megaprosthesis (CCOM) in Complex Revision Lower Limb Arthroplasty.

Background: Patients presenting with periprosthetic osteolysis or fracture between ipsilateral hip and knee arthroplasties are challenging to treat successfully. Long-stem implants, osteopenic bones, and patient comorbidities all represent considerable surgical challenges. Poor results of fracture fixation in this group, coupled with the desire to retain well-performing implants and minimize soft-tissue trauma led to the developmentof the custom cement-over megaprostheses (CCOM).