title: Anteroposterior Laxity After Bicruciate-Retaining Total Knee Arthroplasty Is Closer to the Native Knee Than ACL-Resecting TKA: A Biomechanical Cadaver Study.
abstract: The purpose of this study was to examine whether a bicruciate retaining (BCR) TKA would yield anteroposterior (AP) laxity closer to the native knee than a posterior cruciate ligament retaining (CR) TKA. A BCR TKA was designed and compared to CR TKA and the native knee using cadaver specimens. AP laxity with the CR TKA was greater than the native knee (P=0.006) and BCR TKA (P=0.039), but no difference was found between the BCR TKA and the native knee. No significant differences were found in rotations between the prostheses and the native knee. BCR TKA was shown to be surgically feasible, reduced AP laxity versus CR TKA, and may improve knee stability without using conforming geometry in the implant design.
authors.affiliation: The Biomechanics Group, Department of Mechanical Engineering, Imperial College London, London, UK. Electronic address: c.halewood@imperial.ac.uk.
authors.forename: Camilla
authors.initials: C
authors.lastname: Halewood
authors.affiliation: Corin Ltd, Cirencester, UK.
authors.forename: Alison
authors.initials: A
authors.lastname: Traynor
authors.affiliation: Department of Orthopaedic Surgery, Ziekenhuis Oost-Limburg, Genk, Belgium.
authors.forename: Johan
authors.initials: J
authors.lastname: Bellemans
authors.affiliation: Department of Orthopaedic Surgery, UZ Ghent, Ghent, Belgium.
authors.forename: Jan
authors.initials: J
authors.lastname: Victor
authors.affiliation: The Biomechanics Group, Department of Mechanical Engineering, Imperial College London, London, UK; The Musculoskeletal Surgery Lab, Department of Surgery and Cancer, Imperial College London, London, UK.
authors.forename: Andrew A
authors.initials: AA
authors.lastname: Amis
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000379:methods; D001696:Biomechanical Phenomena; D002102:Cadaver; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000209:etiology / Q000503:physiopathology; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D016119:Posterior Cruciate Ligament / Q000601:surgery; D011474:Prosthesis Design
keywords: ACL retaining TKA; bicruciate prosthesis; kinematics; stability; total knee arthroplasty