title: Does a high-flexion design affect early outcome of medial unicondylar knee arthroplasty? Clinical comparison at 2 years.
abstract: Recently, implant companies have sought to target a more active segment of the population with high-flex implants. Our aim was to compare a successful medial UKA implant with its newer high-flex version. Sixty-one patients (nonflex, 33; high-flex [HF], 28) were prospectively followed after medial UKA with a minimum of 2-year follow-up. Patients were evaluated using Short Form 12, Western Ontario and McMaster Osteoarthritis (WOMAC), Knee Society Scores, and range of motion (ROM). The HF group exhibited significantly higher WOMAC Physical Function scores at 3-month follow-up and higher WOMAC Pain and SF-12 Mental Component scores at 2-year follow-up; all other comparisons were not statistically different, including ROM. The HF cohort had significantly higher improvements in Knee Society Function and Knee score at 1- and 2-year follow-up, respectively; all other comparisons yielded no significant differences in mean improvement from baseline, including ROM or survivorship.
authors.affiliation: Department of Orthopaedic Surgery, Center for Hip and Knee Replacement, New York–Presbyterian Hospital, Columbia University, New York, NY 10032, USA.
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Geller
authors.forename: Richard S
authors.initials: RS
authors.lastname: Yoon
authors.forename: Jason
authors.initials: J
authors.lastname: McKean
authors.forename: William
authors.initials: W
authors.lastname: Macaulay
mesh_terms: D000368:Aged; D018771:Arthralgia / Q000453:epidemiology; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation* / Q000379:methods; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D007719:Knee Joint / Q000502:physiology* / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D010147:Pain Measurement; D015995:Prevalence; D011446:Prospective Studies; D011474:Prosthesis Design; D016059:Range of Motion, Articular / Q000502:physiology*; D020127:Recovery of Function / Q000502:physiology; D012189:Retrospective Studies; D016896:Treatment Outcome