Fig. 7.

Schatzker type III fractures ((a) zero column fractures; pure depression) can often be treated using arthroscopic reduction and internal fixation. The meniscus is elevated proximally (b) as a typical sign for this posterolateral depression fracture. The depressed region is accessed through an anteromedial approach using a hollow trephine (c, d) in order to minimise bone loss. A bone tamp is then used to elevate the depressed area under direct arthroscopic visualisation. Once joint congruity is restored, bone grafting and screw osteosynthesis (e) can be performed. As a sign of a perfect reduction, the meniscus should then be in its normal position (f).