p. One study described an 11-year survivorship of 92% in patients younger than 60 years old, with another 22% showing progression of the unresurfaced compartment, although not requiring revision at the time of follow-up. There has been continued discussion concerning whether the patellofemoral compartment should be a determining factor in the decision to perform a UKA. One recent study pointed out that patellofemoral congruence is improved after UKA and that this may be the reason for reports of good outcomes after UKA done for patellofemoral osteoarthritis (OA). The type of bearing used in medial compartment arthroplasty also has been debated, with many advocating the use of a mobile-bearing UKA. A recent study