title: The Incidence and Short Term Functional Effect of Partial PCL Release in Fixed and Mobile Bearing PCL Retaining TKA.
abstract: Posterior cruciate ligament (PCL) release may be required to balance the flexion gap in PCL retaining TKA. This study examines the incidence and functional consequences of PCL release in both fixed and mobile bearing TKA. A consecutive series of 1388 TKAs with 1014 fixed bearing, and 374 mobile bearing implants were reviewed for prevalence of partial PCL release, restoration of potential flexion and objective knee stability at minimum one-year follow-up. Patients receiving mobile bearing inserts were more likely to need partial PCL release (42% versus 17.5%). The occurrence of partial PCL release did not have a significant impact on knee range of motion and subjective knee stability. The need for a partial PCL release appears to be greater in mobile than in fixed bearing. Knees that required a release in both groups demonstrated no difference in restoration of flexion compared with unreleased knees and no adverse effects on flexion stability.
authors.affiliation: University of California Irvine, Orange, California.
authors.forename: Ran
authors.initials: R
authors.lastname: Schwarzkopf
authors.affiliation: University of California Irvine, Orange, California.
authors.forename: Spencer
authors.initials: S
authors.lastname: Woolwine
authors.affiliation: New England Baptist Hospital, Boston, MA, USA.
authors.forename: Lee
authors.initials: L
authors.lastname: Josephs
authors.affiliation: New England Baptist Hospital, Boston, MA, USA.
authors.forename: Richard D
authors.initials: RD
authors.lastname: Scott
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods* / Q000706:statistics & numerical data; D003430:Cross-Sectional Studies; D006801:Humans; D007719:Knee Joint / Q000502:physiology / Q000601:surgery; D008875:Middle Aged; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D016059:Range of Motion, Articular
keywords: fixed bearing; flexion stability; knee instability; mobile bearing; posterior cruciate ligament; total knee arthroplasty