title: Lateral facetectomy decreased patellofemoral contact pressure in total knee replacement: A cadaveric study.
abstract: BACKGROUND
  To study the patellofemoral contact pressure in patellar non-resurfacing total knee replacement after lateral facetectomy in different amounts of bone removal.
  
  
  METHODS
  Eight knees from four fresh-frozen whole body cadavers were used for this study. Total knee replacement of all knees was performed by the same surgical technique. The contact pressure was measured and recorded when the knee performed passive motion from full extension to full flexion in native patella, lateral retinacular junction release, 10% lateral facetectomy, and 20% lateral facetectomy.
  
  
  RESULTS
  Peak patellofemoral contact pressure decreased progressively from native patellar, junctional release of the patella, 10% facetectomy, and 20% facetectomy. The peak patellofemoral contact pressures were statistically significantly different in each patellar condition (p= 0.025).
  
  
  CONCLUSIONS
  In the experimental study, lateral facetectomy can reduce the peak patellofemoral contact pressure in patellar non-resurfacing total knee arthroplasty.
authors.affiliation: Department of Orthopaedic Surgery and Physical Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
authors.forename: Varah
authors.initials: V
authors.lastname: Yuenyongviwat
authors.affiliation: Department of Orthopaedic Surgery and Physical Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
authors.forename: Khanin
authors.initials: K
authors.lastname: Iamthanaporn
authors.affiliation: Department of Orthopaedic Surgery and Physical Medicine, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
authors.forename: Theerawit
authors.initials: T
authors.lastname: Hongnaparak
keywords: Facetectomy; Non-resurfacing; Patellofemoral joint; Pressure; Total knee replacement