The assessment of instability in the osteoarthritic knee.

Patient-reported instability is a common complaint amongst those with knee arthritis.Much research has examined the assessment of self-reported instability in the knee; however, no definitive quantitative measure of instability has been developed.This review focuses on the current literature investigating the nature of self-reported instability in the arthritic knee and discusses the possibilities of further investigation. Cite this article: EFORT Open Rev 2019;4:70-76. DOI: 10.1302/2058-5241.4.170079.