The aim of mechanical alignment in total knee arthroplasty is to align all knees into a fixed neutral position, even though not all knees are the same. As a result, mechanical alignment often alters a patient's constitutional alignment and joint line obliquity, resulting in soft-tissue imbalance. This annotation provides an overview of how the Coronal Plane Alignment of the Knee (CPAK) classification can be used to predict imbalance with mechanical alignment, and then offers practical guidance for bone balancing, minimizing the need for soft-tissue releases.

中文翻译：

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并非所有的膝盖都是一样的。


全膝关节置换术中机械对准的目的是将所有膝盖对准固定的中立位置，即使并非所有膝盖都相同。因此，机械对准通常会改变患者的体质对准和关节线倾斜，导致软组织不平衡。此注释概述了如何使用膝关节冠状面对准 (CPAK) 分类来预测机械对准的不平衡，然后提供骨平衡的实用指导，最大限度地减少软组织松解的需要。