Kinematic Alignment technique for Total Knee Arthroplasty: a scoping review

Abstract

Purpose

This scoping review aims to analyze history, philosophy, surgical technique, and results of Kinematic Alignment (KA) in total knee arthroplasty (TKA). KA co-aligns the axes and joint lines of the components with the three «kinematic» axes and joint lines of the pre-arthritic or native knee without placing restrictions on the pre-operative deformity and post-operative correction.

Methods

A scoping review of the existing literature utilizing PubMed was performed in march 2020. 44 studies published in peer-reviewed journals over the last ten years in English were reviewed. 

Results

The growing interest in KA is confirmed by the presence of several studies comparing MA and KA techniques reported in the literature. Many reviews and meta-analysis showed that the functional outcomes and flexion range of motion of the KA technique were similar or even better than ones of the mechanically aligned MA implants.

Conclusion

The KA TKA is an effective alternative method to MA TKA, striving to increase patients satisfaction after TKA. Multicenter RCTs with longer follow up and larger sample studies are needed to clarify its longevity and results.

Keywords: Kinematic alignment; Knee; Mechanical alignment; Outcome; Total knee arthroplasty.

Level of evidence: V