title: No difference in clinical and radiologic outcomes after total knee arthroplasty with a new ultra-congruent mobile bearing system and rotating platform mobile bearing systems after minimum 5-year follow-up.
abstract: We retrospectively compared the clinical and radiographic results between 76 primary total knee arthroplasties (TKAs) using the e.motion Ultra-Congruent prosthesis and 155 primary TKAs using the Low Contact Stress rotating platform. All patients had a minimum 5-year follow-up. Range of motion, Hospital for Special Surgery score, Knee Society Knee Score and Knee Society Functional Score significantly increased in both groups postoperatively, but there was no significant difference between the two groups. The mechanical femorotibial angle improved in both groups postoperatively. Coronal and sagittal component angles were well maintained at the final follow-up. This study demonstrates that a new mobile-bearing prosthesis, designed to be highly congruent with a rotating bearing, could be considered with theoretical advantages and comparable outcomes of established mobile-bearing prostheses.
authors.affiliation: Department of Orthopaedic Surgery, KonKuk University Medical Center, KonKuk University School of Medicine, Seoul, Korea.
authors.forename: Young-Bong
authors.initials: YB
authors.lastname: Ko
authors.affiliation: Department of Orthopaedic Surgery, Chung-Ang University School of Medicine, Seoul, Korea.
authors.forename: Eui-Chan
authors.initials: EC
authors.lastname: Jang
authors.affiliation: Department of Orthopaedic Surgery, Chung-Ang University School of Medicine, Seoul, Korea.
authors.forename: Sang-Min
authors.initials: SM
authors.lastname: Park
authors.affiliation: Department of Orthopaedic Surgery, Chung-Ang University School of Medicine, Seoul, Korea.
authors.forename: Seong Hwan
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, Chung-Ang University School of Medicine, Seoul, Korea.
authors.forename: Yoon-Ho
authors.initials: YH
authors.lastname: Kwak
authors.affiliation: Department of Orthopaedic Surgery, Chung-Ang University School of Medicine, Seoul, Korea.
authors.forename: Han-Jun
authors.initials: HJ
authors.lastname: Lee
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000601:surgery; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D010020:Osteonecrosis / Q000601:surgery; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: LCS; e.motion; mobile bearing system; rotating platform; total knee arthroplasty; ultra-congruent