“…The “Register of Orthopaedic Prosthetic Implant (RIPO) of Emilia-Romagna region” published 30 papers from 2002 to 2022 [ 24 , 645 ]. Among them, twenty-eight were cohort studies [ 24 , 26 , 39 , 43 , 57 , 145 , 164 , 189 , 231 , 288 , 297 , 482 , 491 , 502 , 506 , 508 , 527 , 540 , 562 , 563 , 569 , 585 , 592 , 597 , 599 , 624 , 630 , 645 ], one was RCT [ 476 ] and one registry protocol [ 468 ]. Of these 30 studies, 16 were survival [ 26 , 164 , 189 , 231 , 288 , 482 , 491 , 502 , 508 , 527 , 540 , 563 , 569 , 585 , 592 , 599 ], six analysed implant types [ 24 , 43 , 297 , 506 , 624 , 645 ], and two studied postoperative complications [ 597 , 630 ].…”