[Anatomy and biomechanical research progress of knee posteromedial corner]

To review the recent anatomy and biomechanical research progress of knee posteromedial corner, to analyze deficient aspect, and to predict future research directions.

Domestic and international literature about the anatomy and function of knee posteromedial corner in recent years was reviewed extensively, at the same time, the biomechanics of corresponding structure was summarized and analyzed.

The anatomical structures of knee posteromedial corner included the static stability structures and the dynamic stability structures. The dynamic stability structures were more important, including posterior root of medial meniscus, posterior oblique ligament, semimembranosus extensions, meniscotibial ligament and oblique popliteal ligament. The posterior oblique ligament was most important structure to contribute to stabilization of valgus, anterior internal rotation of knee and posterior movement of tibia.

Anatomical reconstruction of knee posteromedial corner especially the posterior oblique ligament is the key to the reconstruction of knee posteromedial function stability.