Extensor Mechanism Disruption Remains a Challenging Problem

•Functionally successful rate of extensor mechanism reconstruction out to 3 years was 50.0%.•Neither mesh nor allograft was superior for extensor mechanism reconstruction.•Knee Injury and Osteoarthritis Outcome Score, Joint Replacement scores were low, even for successes.•In-situ survivorship of the reconstructions, albeit not necessarily functional, was 75.0% at 36 months.•High rates of complications, reoperations, and mortality were noted.