title: Quantification of soft tissue balance in total knee arthroplasty using finite element analysis.
abstract: Unbalanced contact force on the tibial component has been considered a factor leading to loosening of the implant and increased wear of the bearing surface in total knee arthroplasty. Because it has been reported that good alignment cannot guarantee successful clinical outcomes, the soft tissue balance should be checked together with the alignment. Finite element models of patients' lower extremities were developed to analyse the medial and lateral contact force distribution on the tibial insert. The distributions for four out of five patients were not balanced equally, even though the alignment angles were within a clinically acceptable range. Moreover, the distribution was improved by changing soft tissue release and ligament tightening for the specific case. Integration of the biomechanical modelling, image matching and finite element analysis techniques with the patient-specific properties and various dynamic loading would suggest a clinically relevant pre-operative planning for soft tissue balancing.
authors.affiliation: a Department of Orthopaedic Surgery , KonKuk University Medical Center, KonKuk University School of Medicine , Seoul 143-729 , Republic of Korea.
authors.forename: Kwang-Jun
authors.initials: KJ
authors.lastname: Oh
authors.forename: Won Man
authors.initials: WM
authors.lastname: Park
authors.forename: Kyungsoo
authors.initials: K
authors.lastname: Kim
authors.forename: Yoon Hyuk
authors.initials: YH
authors.lastname: Kim
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D005260:Female; D020342:Finite Element Analysis; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D035002:Lower Extremity / Q000000981:diagnostic imaging / Q000503:physiopathology; D011859:Radiography; D013977:Tibia / Q000503:physiopathology
keywords: arthroplasty; biomechanics; finite element analysis; knee; soft tissue balance