Patient-reported outcome correlates with knee function after a single-design mobile-bearing TKA.
With substantial interest devoted to improving knee flexion after TKA, it is important to document the relationship between high range of motion and patient-rated outcomes shown. We therefore asked whether single-design high-flexion mobile-bearing posterior-stabilized TKA resulted in: (1) improved knee function; (2) satisfying subjective results; (3) participation recreational and sporting activities; and (4) function correlated to the final range of motion. We prospectively followed 445 consecutive patients having 516 TKAs from September 2000 to January 2005. The same high-flexion posterior-stabilized mobile-bearing implant was used in all patients. Mean patient age was 71 +/- 8 years and mean body mass index was 28 +/- 4 kg/m(2). The minimum clinical followup was 2 years (mean, 3 years; range, 2-4 years). The postoperative range of knee flexion was 128 degrees +/- 4 degrees and the mean Knee Society function and knee scores were 91 +/- 6 and 96 +/- 3, respectively. Eighty-two percent of patients were involved in sporting activities and 86% returned to their previous level of activity. These data confirm that high postoperative range of knee flexion improve patient-rated outcomes.


METHODS
Level IV, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.
Argenson
Jean-Noel
JN
Department of Orthopedic Surgery, Service de Chirurgie Orthopédique, Aix-Marseille University, Hôpital Sainte-Marguerite, Marseille, France. jean-noel.argenson@ap-hm.fr
Parratte
Sebastien
S
Ashour
Abdullah
A
Komistek
Richard D
RD
Scuderi
Giles R
GR
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology* / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D017060:Patient Satisfaction; D011474:Prosthesis Design; D016059:Range of Motion, Articular / Q000502:physiology*; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D013997:Time Factors; D016896:Treatment Outcome