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.
6% to 9% of patellar fractures are open, a percentage that is increasing due to an aging population and rising rates of total knee arthroplasty (TKA).