title: Medial unicompartmental knee arthroplasty in patients less than 55 years old: minimum of two years of follow-up.
abstract: Eighty-five fixed bearing medial unicompartmental arthroplasties were performed in 42 men and 33 women with a mean age of 49 years (range, thirty-three to fifty-five years old) at the time of surgery. At a mean of 4.0 years (range two to twelve years), the mean pre-operative Knee Society score improved from 49 to 95.1 points (P<0.0001) and the mean UCLA activity score was 7.5 (range 5 to 9). Three knees underwent revision to a total knee arthroplasty; two for arthritic progression in the lateral compartment and one for pain. At the time of final follow-up, two knees (2.4%) demonstrated progressive Grade 4 arthritis of the patellofemoral compartment but were asymptomatic. There was no radiographic evidence of loosening, osteolysis, or premature polyethylene wear. Estimated survivorship was 96.5% at 10 years. UKA offered excellent early outcomes in this cohort of younger, active patients.
authors.affiliation: Section of Adult Reconstruction, Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois.
authors.forename: Debdut
authors.initials: D
authors.lastname: Biswas
authors.forename: Geoffrey S
authors.initials: GS
authors.lastname: Van Thiel
authors.forename: Nathan G
authors.initials: NG
authors.lastname: Wetters
authors.forename: Bryan J
authors.initials: BJ
authors.lastname: Pack
authors.forename: Richard A
authors.initials: RA
authors.lastname: Berger
authors.forename: Craig J
authors.initials: CJ
authors.lastname: Della Valle
mesh_terms: D000328:Adult; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D011859:Radiography; D016059:Range of Motion, Articular
keywords: arthroplasty; knee; patellofemoral; unicompartmental