Re-injury to a recently rehabilitated or operated knee is a common occurrence that can result in significant loss of function. Knee stability measures have been used to diagnose and assess knee stability before and after rehabilitation interventions. Here, we systematically review the literature and evaluate the different anterior-posterior and rotational knee stability measures currently in use. A computer-assisted literature search of the Medline, CINAHL, EMBASE, PubMed and Cochrane databases was conducted using keywords related to knee stability measures. In a second step, we conducted a manual search of the references cited in these articles to capture any studies that may have been missed in the searched databases. The literature search strategy identified a total of 574 potential studies. After revisiting the titles and abstracts, 34 full-text articles met the inclusion criteria and were included in this review. Most articles compared knee stability measures, whilst other studies assessed their sensitivity and specificity. Several techniques and devices used to measure knee stability are reported in the literature. However, there are only a limited number of quality studies where these techniques and/or devices have been evaluated. Further development and investigation with high quality study designs is necessary to robustly evaluate the existing devices/techniques.
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