PURPOSE: ACL deficiency may cause abnormal knee kinematics and is associated with a tenfold increase in surgical failures after unicompartmental knee arthroplasty, such as aseptic loosening of the tibial compartment and medial bearing instability. The current investigators hypothesized that in a knee with UKA, single-bundle ACL reconstruction would restore tibiofemoral translation to levels similar to those of the intact ACL. METHODS: Two fresh frozen pelvis-to-toes specimens (four paired knees) were used. On each knee, medial unicompartmental knee arthroplasty was performed by a single surgeon. ACL reconstructions were performed by conventional single-bundle technique. Three trials of Lachman and pivot shift tests were performed and recorded for each knee with the ACL-intact, after sectioning the ACL and after single-bundle ACL reconstruction. A mechanized pivot shifter was used to perform the pivot shift maneuvers. A surgical navigation system (Praxim Grenoble, France) simultaneously tracked tibiofemoral kinematics. RESULTS: There was a significant difference in lateral compartment translation during the Lachman and pivot shift tests between the ACL-intact/UKA knee and the ACL-deficient/UKA knee (P < 0.05). There was no significant difference in lateral compartment translation during the Lachman and pivot shift tests between the intact/UKA knee and the ACL-reconstructed/UKA knee (n.s.). CONCLUSIONS: For both the Lachman test and the pivot shift test, single-bundle ACL reconstruction restored kinematics in the UKA knee to magnitudes similar to those in the ACL-intact knee.
PURPOSE:ACL deficiency may cause abnormal knee kinematics and is associated with a tenfold increase in surgical failures after unicompartmental knee arthroplasty, such as aseptic loosening of the tibial compartment and medial bearing instability. The current investigators hypothesized that in a knee with UKA, single-bundle ACL reconstruction would restore tibiofemoral translation to levels similar to those of the intact ACL. METHODS: Two fresh frozen pelvis-to-toes specimens (four paired knees) were used. On each knee, medial unicompartmental knee arthroplasty was performed by a single surgeon. ACL reconstructions were performed by conventional single-bundle technique. Three trials of Lachman and pivot shift tests were performed and recorded for each knee with the ACL-intact, after sectioning the ACL and after single-bundle ACL reconstruction. A mechanized pivot shifter was used to perform the pivot shift maneuvers. A surgical navigation system (Praxim Grenoble, France) simultaneously tracked tibiofemoral kinematics. RESULTS: There was a significant difference in lateral compartment translation during the Lachman and pivot shift tests between the ACL-intact/UKA knee and the ACL-deficient/UKA knee (P < 0.05). There was no significant difference in lateral compartment translation during the Lachman and pivot shift tests between the intact/UKA knee and the ACL-reconstructed/UKA knee (n.s.). CONCLUSIONS: For both the Lachman test and the pivot shift test, single-bundle ACL reconstruction restored kinematics in the UKA knee to magnitudes similar to those in the ACL-intact knee.
Authors: Mininder S Kocher; J Richard Steadman; Karen K Briggs; William I Sterett; Richard J Hawkins Journal: Am J Sports Med Date: 2004 Apr-May Impact factor: 6.202
Authors: Andrew D Pearle; Daniel J Solomon; Tony Wanich; Alexandre Moreau-Gaudry; Carinne C Granchi; Thomas L Wickiewicz; Russell F Warren Journal: Am J Sports Med Date: 2007-04-17 Impact factor: 6.202
Authors: R A Berger; D D Nedeff; R M Barden; M M Sheinkop; J J Jacobs; A G Rosenberg; J O Galante Journal: Clin Orthop Relat Res Date: 1999-10 Impact factor: 4.176
Authors: Jeremy F Suggs; Guoan Li; Sang Eun Park; Peter G Sultan; Harry E Rubash; Andrew A Freiberg Journal: J Orthop Res Date: 2006-04 Impact factor: 3.494