title: Is Single-Radius Design Better for Quadriceps Recovery in Total Knee Arthroplasty?
abstract: OBJECTIVE
  Although single-radius (SR) designs have a theoretical advantage in quadriceps recovery following total knee arthroplasty (TKA), there has been a paucity of objective evaluation studies.
  
  
  METHODS
  One hundred and twenty minimally invasive TKAs were prospectively randomized by a single surgeon into 2 groups: SR design TKA group and multi-radius design TKA group. Quadriceps force and power were assessed using a dynamometer, and clinical data were investigated preoperatively and 6 weeks, 3 months, 6 months and 1 year postoperatively.
  
  
  RESULTS
  There were no differences between two groups in quadriceps recovery and clinical results throughout the follow-up period. Furthermore, the proportion of patients whose postoperative quadriceps force and power reached preoperative level was similar in both groups.
  
  
  CONCLUSIONS
  Femoral component design itself would not significantly influence quadriceps recovery after TKA.
authors.affiliation: Department of Orthopaedic Surgery, Center for Joint Diseases and Rheumatism, Kyung Hee University Hospital at Gangdong, Seoul, Korea.
authors.forename: Duk-Hyun
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, Kyung Hee University Hospital, Seoul, Korea.
authors.forename: Dong-Kyoon
authors.initials: DK
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, Center for Joint Diseases and Rheumatism, Kyung Hee University Hospital at Gangdong, Seoul, Korea.
authors.forename: Sang-Hak
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Orthopaedic Surgery, Center for Joint Diseases and Rheumatism, Kyung Hee University Hospital at Gangdong, Seoul, Korea.
authors.forename: Kang-Il
authors.initials: KI
authors.lastname: Kim
authors.affiliation: Department of Orthopaedic Surgery, Kyung Hee University Hospital, Seoul, Korea.
authors.forename: Dae-Kyung
authors.initials: DK
authors.lastname: Bae
keywords: Arthroplasty; Knee; Muscle strength dynamometer; Prosthesis design; Quadriceps muscle