title: Disparate postoperative results in the first and second knees on simultaneous bilateral total knee arthroplasty.
abstract: We hypothesized that the circumstances of the two consecutive operations of a simultaneous bilateral total knee arthroplasty (TKA) are different, and could lead to different outcomes of overlapping bilateral TKAs. Both knees of 420 subjects were evaluated in the current study. In the second TKA, there were more incidence rates of outlier in mechanical femoro-tibial angle (16.2% vs. 9.0%), more blood loss (735 vs. 656 mL), and longer operation time (61, 58 minutes respectively), as compared to the first TKA, while no significant differences in clinical outcomes. In conclusion, there were no significant differences in the clinical outcomes even though few distinct outcomes due to different circumstances of the surgery. Awareness of these findings can help the continued success of bilateral TKA in an increasing patient population.
authors.affiliation: Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors.forename: Jai Gon
authors.initials: JG
authors.lastname: Seo
authors.affiliation: Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors.forename: Byung Hoon
authors.initials: BH
authors.lastname: Lee
authors.affiliation: Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors.forename: Young-Wan
authors.initials: YW
authors.lastname: Moon
authors.affiliation: Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors.forename: Moon Jong
authors.initials: MJ
authors.lastname: Chang
authors.affiliation: Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors.forename: Se Hwan
authors.initials: SH
authors.lastname: Park
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000379:methods / Q000592:standards*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: clinical outcome, osteoarthritis; extramedullary reference; simultaneous; total knee arthroplasty