Knee biomechanics: Will we ever know the truth?

[摘要] Kang et al1 have ably demonstrated the roleof finite element analysis (FEA) in deciphering the complex interplay between component positioning of the implanted total kneearthroplasty (TKA) and the kinetics of keysoft-tissue structures. This work extends ourknowledge of the role of the central posteriorrestraint (posterior cruciate ligament (PCL))and the impact of varying posterior condylaroffset (PCO) and posterior tibial slope uponfinal tibiofemoral flexion, muscle load, andby inference, final construct stability. Usingan established computer model of TKA, thefine balancing of the knee after arthroplastyhas been keenly exposed. The extension ofthis modelling work to examine muscle loadin the quadriceps and patellofemoral articulation is of particular interest, and supportsprevious in vitro cadaveric work.2,3 It wouldappear that there is, in effect, a form of lengthtension effect when determining optimal offset and tibial slope.

[学科分类] 骨科学