6% to 9% of patellar fractures are of the open type. An ageing population and global increase in the number of TKAs has led to an increasing number of periprosthetic fractures of which a patella fracture is one type.
The prevalence of open patellar fractures, which are a type of periprosthetic fracture, is rising due to an aging population and the increasing number of total knee arthroplasty procedures.