OTT πΒ Outcome StudiesGeneral Populationβ£2 Year Outcomes (KSSTA 1998, Marcacci et al.)β£10-Year PROMs & Survivorship (AJSM 2021, Grassi et al.)Ultra Long Term Follow Up β£5β7 Year Follow-up (KSSTA 2003, Marcacci et al.)β£10β13 Year Follow-up (AJSM 2009, Marcacci et al.)β£20 Year Follow-up (AJSM 2017, Zaffagnini et al.)